TY  - JOUR
AU  - Stojanovic, Bojan
AU  - Djordjevic, Nenad
AU  - Davidovic, Vesna
AU  - Bozickovic, Aleksa
AU  - Ivetic, Aleksandra
AU  - Obradovic, Sasa
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6315
AB  - Aim of study: To evaluate corn grain micronization for calves fed a grower diet. Area of study: Padinska Skela – Belgrade, Serbia. Material and methods: Thirty weaned Holstein dairy calves (65–74 days of age) were randomly assigned to one of two treatments with growers containing micronized (MCG) or untreated corn grain (UCG). The experimental period lasted for 60 days. Main results: The values of total tract apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), and nonfiber carbohydrates (NFC) were higher for calves fed MCG versus those within the UCG treatment by 3.9% (p<0.05), 7.0% (p<0.01), 7.1% (p<0.01) and 7.5% (p<0.05), respectively, for the days 25–30 of the experimental period. In addition, the values of digestibility of OM, CP, and NFC were higher by 4.9% (p<0.05), 5.7% (p<0.05), and 6.0% (p<0.05), respectively, for the days 55–60 of the experimental period. The density of metabolizable energy, net energy for maintenance and gain in consumed dietary DM was higher (p<0.001) by 4.7, 5.5, and 7.2%, respectively for calves fed on the grower containing micronized corn grain (MCG), during the first digestibility period, and by 3.0, 3.6, and 4.6%, respectively, during the second digestibility period. Energy intake was lower (p<0.05) during the second digestibility period, for calves fed a diet with micronized corn. Blood urea N was affected (p<0.001) by dietary treatments. Lower values (10.2%) were observed for calves fed the grower containing MCG. Research highlights: The micronization of corn grain is a useful tool for optimizing weaned calf production due to the improvement in the digestibility and energy content of the ration. © 2023 CSIC.
T2  - Spanish Journal of Agricultural Research
T2  - Spanish Journal of Agricultural Research
T1  - The effect of corn grain micronization on diet digestibility and blood biochemical parameters in weaned Holstein calves
IS  - 1
VL  - 21
DO  - 10.5424/sjar/2023211-18925
ER  - 

@article{
author = "Stojanovic, Bojan and Djordjevic, Nenad and Davidovic, Vesna and Bozickovic, Aleksa and Ivetic, Aleksandra and Obradovic, Sasa",
year = "2023",
abstract = "Aim of study: To evaluate corn grain micronization for calves fed a grower diet. Area of study: Padinska Skela – Belgrade, Serbia. Material and methods: Thirty weaned Holstein dairy calves (65–74 days of age) were randomly assigned to one of two treatments with growers containing micronized (MCG) or untreated corn grain (UCG). The experimental period lasted for 60 days. Main results: The values of total tract apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), and nonfiber carbohydrates (NFC) were higher for calves fed MCG versus those within the UCG treatment by 3.9% (p<0.05), 7.0% (p<0.01), 7.1% (p<0.01) and 7.5% (p<0.05), respectively, for the days 25–30 of the experimental period. In addition, the values of digestibility of OM, CP, and NFC were higher by 4.9% (p<0.05), 5.7% (p<0.05), and 6.0% (p<0.05), respectively, for the days 55–60 of the experimental period. The density of metabolizable energy, net energy for maintenance and gain in consumed dietary DM was higher (p<0.001) by 4.7, 5.5, and 7.2%, respectively for calves fed on the grower containing micronized corn grain (MCG), during the first digestibility period, and by 3.0, 3.6, and 4.6%, respectively, during the second digestibility period. Energy intake was lower (p<0.05) during the second digestibility period, for calves fed a diet with micronized corn. Blood urea N was affected (p<0.001) by dietary treatments. Lower values (10.2%) were observed for calves fed the grower containing MCG. Research highlights: The micronization of corn grain is a useful tool for optimizing weaned calf production due to the improvement in the digestibility and energy content of the ration. © 2023 CSIC.",
journal = "Spanish Journal of Agricultural Research, Spanish Journal of Agricultural Research",
title = "The effect of corn grain micronization on diet digestibility and blood biochemical parameters in weaned Holstein calves",
number = "1",
volume = "21",
doi = "10.5424/sjar/2023211-18925"
}

Stojanovic, B., Djordjevic, N., Davidovic, V., Bozickovic, A., Ivetic, A.,& Obradovic, S.. (2023). The effect of corn grain micronization on diet digestibility and blood biochemical parameters in weaned Holstein calves. in Spanish Journal of Agricultural Research, 21(1).
https://doi.org/10.5424/sjar/2023211-18925

Stojanovic B, Djordjevic N, Davidovic V, Bozickovic A, Ivetic A, Obradovic S. The effect of corn grain micronization on diet digestibility and blood biochemical parameters in weaned Holstein calves. in Spanish Journal of Agricultural Research. 2023;21(1).
doi:10.5424/sjar/2023211-18925 .

Stojanovic, Bojan, Djordjevic, Nenad, Davidovic, Vesna, Bozickovic, Aleksa, Ivetic, Aleksandra, Obradovic, Sasa, "The effect of corn grain micronization on diet digestibility and blood biochemical parameters in weaned Holstein calves" in Spanish Journal of Agricultural Research, 21, no. 1 (2023),
https://doi.org/10.5424/sjar/2023211-18925 . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Djordjević, Nenad
AU  - Simić, Aleksandar
AU  - Božičković, Aleksa
AU  - Davidović, Vesna
AU  - Ivetić, Aleksandra
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5279
AB  - This study examined the in vitro crude protein (CP) degradability of wilted, dried for hay and ensiled Medicago sativa, Trifolium pratense and Sorghum sudanense, as well as of ensiled legume-sudan grass mixtures. The rumen degradable protein (RDP) was estimated using the latest Cornell net carbohydrate and protein system (CNCPS v6.5) and with the Streptomyces griseus protease assay (48 h of incubation). Sudan grass forages were the lowest in moderately degradable CP and the highest in CP fraction C, while red clover showed the least values for the soluble true protein like alfalfa forages for slowly degradable protein bound in neutral detergent fibre (NDF). Ensiling of legume-sudan grass mixtures decreases N-NH3 content by 12.2 and 5.1% in comparison with alfalfa and red clover silages, respectively. The RDP values for sudan grass (fresh, wilted, hay) were lower by 7.2 to 7.9% or 10.4 to 15.7% (CNCPS or S. griseus procedure) and up to 0.8 or 5.3 to 9.7% in comparison with alfalfa and red clover, respectively. The reduction of protein degradability in ensiled legume-sudan grass mixtures was 5.5 or 6.1% and 1.5 or 3% compared to alfalfa and red clover silages, respectively. Due to higher rumen undegradable protein content, the sudan grass and legume-sudan grass mixtures may be efficiently used to improve the protein utilization in ruminant nutrition.
PB  - Ankara Univ Press, Ankara
T2  - Ankara Universitesi Veteriner Fakultesi Dergisi
T1  - The in vitro protein degradability of legume and sudan grass forage types and ensiled mixtures
EP  - 425
IS  - 4
SP  - 419
VL  - 67
DO  - 10.33988/auvfd.702257
ER  - 

@article{
author = "Stojanović, Bojan and Djordjević, Nenad and Simić, Aleksandar and Božičković, Aleksa and Davidović, Vesna and Ivetić, Aleksandra",
year = "2020",
abstract = "This study examined the in vitro crude protein (CP) degradability of wilted, dried for hay and ensiled Medicago sativa, Trifolium pratense and Sorghum sudanense, as well as of ensiled legume-sudan grass mixtures. The rumen degradable protein (RDP) was estimated using the latest Cornell net carbohydrate and protein system (CNCPS v6.5) and with the Streptomyces griseus protease assay (48 h of incubation). Sudan grass forages were the lowest in moderately degradable CP and the highest in CP fraction C, while red clover showed the least values for the soluble true protein like alfalfa forages for slowly degradable protein bound in neutral detergent fibre (NDF). Ensiling of legume-sudan grass mixtures decreases N-NH3 content by 12.2 and 5.1% in comparison with alfalfa and red clover silages, respectively. The RDP values for sudan grass (fresh, wilted, hay) were lower by 7.2 to 7.9% or 10.4 to 15.7% (CNCPS or S. griseus procedure) and up to 0.8 or 5.3 to 9.7% in comparison with alfalfa and red clover, respectively. The reduction of protein degradability in ensiled legume-sudan grass mixtures was 5.5 or 6.1% and 1.5 or 3% compared to alfalfa and red clover silages, respectively. Due to higher rumen undegradable protein content, the sudan grass and legume-sudan grass mixtures may be efficiently used to improve the protein utilization in ruminant nutrition.",
publisher = "Ankara Univ Press, Ankara",
journal = "Ankara Universitesi Veteriner Fakultesi Dergisi",
title = "The in vitro protein degradability of legume and sudan grass forage types and ensiled mixtures",
pages = "425-419",
number = "4",
volume = "67",
doi = "10.33988/auvfd.702257"
}

Stojanović, B., Djordjević, N., Simić, A., Božičković, A., Davidović, V.,& Ivetić, A.. (2020). The in vitro protein degradability of legume and sudan grass forage types and ensiled mixtures. in Ankara Universitesi Veteriner Fakultesi Dergisi
Ankara Univ Press, Ankara., 67(4), 419-425.
https://doi.org/10.33988/auvfd.702257

Stojanović B, Djordjević N, Simić A, Božičković A, Davidović V, Ivetić A. The in vitro protein degradability of legume and sudan grass forage types and ensiled mixtures. in Ankara Universitesi Veteriner Fakultesi Dergisi. 2020;67(4):419-425.
doi:10.33988/auvfd.702257 .

Stojanović, Bojan, Djordjević, Nenad, Simić, Aleksandar, Božičković, Aleksa, Davidović, Vesna, Ivetić, Aleksandra, "The in vitro protein degradability of legume and sudan grass forage types and ensiled mixtures" in Ankara Universitesi Veteriner Fakultesi Dergisi, 67, no. 4 (2020):419-425,
https://doi.org/10.33988/auvfd.702257 . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Simić, Aleksandar
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Davidović, Vesna
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5209
AB  - A cutting experiment was conducted to analyze the changes in the crude protein (CP) fraction content and in the estimated ruminal protein degradability of forage, obtained in conditions of simulated rotational spring grazing on permanent grassland. The field trial was conducted on permanent pasture during 2015 and included three cuttings as a simulated rotational spring grazing. For determination of protein degradability of pasture forage, the fractionation of the CP according to Cornell Net Carbohydrate and Protein System (CNCPS v6.5) and the Streptomyces griseus protease assay were used. Relative to CP, no significant differences were found among cuts for ammonia N content (A1 fraction) and for protein fraction C which is completely unavailable to the animals. Values for soluble true protein (A2 fraction) and cell wall-associated protein, which is acid detergent soluble (B2), were significantly increased (p lt 0.05) while a significant reduction (p lt 0.05) of the moderately degradable protein (B1) content was determined during the growing season. The lower rumen degradable protein (RDP) content of grassland herbage was obtained in the second cut which was significant (p lt 0.05) according to the CNCPS procedure. Obtained high solubility and degradability of CP in pasture require adequate content of readily available carbohydrates in rations for grazing ruminants to provide efficient utilization of consumed protein.
AB  - Istraživanje je obavljeno u cilju utvrđivanja promena u sadržaju frakcija sirovog proteina (SP) i ruminalne razgradivosti proteina zelene mase dobijene košenjem prirodnog travnjaka u uslovima koji su odgovarali rotacijskoj pregonskoj ispaši tokom prolećne sezone. Poljski ogled je izveden na permanentnom pašnjaku tokom proleća 2015. godine i uključivao je tri otkosa koji su odgovarali ciklusima ispaše. Za determinisanje razgradivosti proteina zelene mase, frakcionisanje sirovog proteina je obavljeno prema proceduri Cornell Net Carbohydrate and Protein System (CNCPS v6.5), kao i primenom in vitro metode korišćenjem Streptomyces griseus proteaze. U odnosu na SP, nisu utvrđene značajne razlike između otkosa - ciklusa ispaše u pogledu sadržaja amonijačnog N (frakcija A1), kao i u pogledu sadržaja proteinske frakcije C, koja je potpuno nedostupna životinjama. Sadržaj rastvorljivog pravog proteina (frakcija A2) i proteina vezanog za ćelijski zid, koji je rastvorljiv u kiselom deterdžentu (frakcija B2) se značajno povećavao (p lt 0,05), dok se sadržaj umereno razgradive frakcije proteina (B1) značajno smanjivao (p lt 0,05) tokom prolećne sezone vegetacije. Najmanja vrednost za ruminalnu razgradivost i učešće RDP (protein razgradiv u rumenu) u SP zelene mase sa pašnjaka utvrđena je u drugom otkosu, a ova razlika je bila značajna (p lt 0,05) kada je ruminalna razgradivost proteina determinisana korišćenjem procedure CNCPS. Utvrđeno visoko učešće rastvorljive frakcije SP i visoka ruminalna razgradivost SP zelene mase sa pašnjaka ukazuju na potrebu podrobnijeg balansiranja obroka za preživare na paši u pogledu sadržaja lako razgradivih ugljenih hidrata, a u cilju obezbeđenja efikasnog iskorišćavanja konzumiranog proteina.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - Protein degradability of grassland forage under simulated rotational spring grazing
T1  - Razgradivost proteina zelene mase sa travnjaka u uslovima prolećne pregonske ispaše
EP  - 263
IS  - 3
SP  - 255
VL  - 64
DO  - 10.2298/JAS1903255S
ER  - 

@article{
author = "Stojanović, Bojan and Simić, Aleksandar and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Davidović, Vesna",
year = "2019",
abstract = "A cutting experiment was conducted to analyze the changes in the crude protein (CP) fraction content and in the estimated ruminal protein degradability of forage, obtained in conditions of simulated rotational spring grazing on permanent grassland. The field trial was conducted on permanent pasture during 2015 and included three cuttings as a simulated rotational spring grazing. For determination of protein degradability of pasture forage, the fractionation of the CP according to Cornell Net Carbohydrate and Protein System (CNCPS v6.5) and the Streptomyces griseus protease assay were used. Relative to CP, no significant differences were found among cuts for ammonia N content (A1 fraction) and for protein fraction C which is completely unavailable to the animals. Values for soluble true protein (A2 fraction) and cell wall-associated protein, which is acid detergent soluble (B2), were significantly increased (p lt 0.05) while a significant reduction (p lt 0.05) of the moderately degradable protein (B1) content was determined during the growing season. The lower rumen degradable protein (RDP) content of grassland herbage was obtained in the second cut which was significant (p lt 0.05) according to the CNCPS procedure. Obtained high solubility and degradability of CP in pasture require adequate content of readily available carbohydrates in rations for grazing ruminants to provide efficient utilization of consumed protein., Istraživanje je obavljeno u cilju utvrđivanja promena u sadržaju frakcija sirovog proteina (SP) i ruminalne razgradivosti proteina zelene mase dobijene košenjem prirodnog travnjaka u uslovima koji su odgovarali rotacijskoj pregonskoj ispaši tokom prolećne sezone. Poljski ogled je izveden na permanentnom pašnjaku tokom proleća 2015. godine i uključivao je tri otkosa koji su odgovarali ciklusima ispaše. Za determinisanje razgradivosti proteina zelene mase, frakcionisanje sirovog proteina je obavljeno prema proceduri Cornell Net Carbohydrate and Protein System (CNCPS v6.5), kao i primenom in vitro metode korišćenjem Streptomyces griseus proteaze. U odnosu na SP, nisu utvrđene značajne razlike između otkosa - ciklusa ispaše u pogledu sadržaja amonijačnog N (frakcija A1), kao i u pogledu sadržaja proteinske frakcije C, koja je potpuno nedostupna životinjama. Sadržaj rastvorljivog pravog proteina (frakcija A2) i proteina vezanog za ćelijski zid, koji je rastvorljiv u kiselom deterdžentu (frakcija B2) se značajno povećavao (p lt 0,05), dok se sadržaj umereno razgradive frakcije proteina (B1) značajno smanjivao (p lt 0,05) tokom prolećne sezone vegetacije. Najmanja vrednost za ruminalnu razgradivost i učešće RDP (protein razgradiv u rumenu) u SP zelene mase sa pašnjaka utvrđena je u drugom otkosu, a ova razlika je bila značajna (p lt 0,05) kada je ruminalna razgradivost proteina determinisana korišćenjem procedure CNCPS. Utvrđeno visoko učešće rastvorljive frakcije SP i visoka ruminalna razgradivost SP zelene mase sa pašnjaka ukazuju na potrebu podrobnijeg balansiranja obroka za preživare na paši u pogledu sadržaja lako razgradivih ugljenih hidrata, a u cilju obezbeđenja efikasnog iskorišćavanja konzumiranog proteina.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "Protein degradability of grassland forage under simulated rotational spring grazing, Razgradivost proteina zelene mase sa travnjaka u uslovima prolećne pregonske ispaše",
pages = "263-255",
number = "3",
volume = "64",
doi = "10.2298/JAS1903255S"
}

Stojanović, B., Simić, A., Grubić, G., Djordjević, N., Božičković, A.,& Davidović, V.. (2019). Protein degradability of grassland forage under simulated rotational spring grazing. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 64(3), 255-263.
https://doi.org/10.2298/JAS1903255S

Stojanović B, Simić A, Grubić G, Djordjević N, Božičković A, Davidović V. Protein degradability of grassland forage under simulated rotational spring grazing. in Journal of Agricultural Sciences (Belgrade). 2019;64(3):255-263.
doi:10.2298/JAS1903255S .

Stojanović, Bojan, Simić, Aleksandar, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Davidović, Vesna, "Protein degradability of grassland forage under simulated rotational spring grazing" in Journal of Agricultural Sciences (Belgrade), 64, no. 3 (2019):255-263,
https://doi.org/10.2298/JAS1903255S . .

TY  - JOUR
AU  - Đekić, Ilija
AU  - Petrović, Jelena
AU  - Božičković, Aleksa
AU  - Djordjević, Vesna
AU  - Tomašević, Igor
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4999
AB  - Dairy consumption studies or life cycle assessment of dairy products have been in research focus for several years providing useful information. However, limited number of studies confronted the two types of data in order to analyze environmental impacts associated with consumers. The objective of this research was to calculate these impacts, namely global warming potential (GWP), ozone depletion potential (ODP), cumulative energy demand (CED), acidification potential (AP) and eutrophication potential (EP) related to the consumption of milk and yogurt in Serbia.In the present paper, life cycle assessment study was performed using data from nine dairy farms and ten dairy plants. The system boundary applied is cradle-to-retail comprising data from cow farms, raw milk transportation, processing and transportation of dairy products. In parallel, a survey on the consumption of milk and yogurt was conducted analyzing responses from 957 dairy product consumers. It was found that milk production is responsible for the emission of 1.511 kg CO2(e)/kg of milk, 7.720 MJe/kg, 0.1363 mg R11e/kg, 12.164 g SO2(e)/kg and 17.825 g PO4e/kg while the results for yogurt are slightly higher 1.672 kg CO2(e)/kg, 7.804 7.720 MJe/kg, 0.1369 mg R11e/kg, 12.238 g SO2(e)/kg and 17.609 g PO4e/kg. Further calculations also revealed that weekly emission of GWP, CED, ODP, AP and EP associated with an average consumer of milk and/or yogurt in Serbia was estimated at values of 2.254 kg CO2e/week, 10.926 MJ(e)/week, 0.19261 mg R11(e)/week, 17.191 g SO2e/week and 24.363 g PO4e/week.These results may be of interest to all actors in the dairy chain giving them a wider perspective of sustainable consumption of dairy products.
PB  - Elsevier, Amsterdam
T2  - Science of the Total Environment
T1  - Main environmental impacts associated with production and consumption of milk and yogurt in Serbia - Monte Carlo approach
VL  - 695
DO  - 10.1016/j.scitotenv.2019.133917
ER  - 

@article{
author = "Đekić, Ilija and Petrović, Jelena and Božičković, Aleksa and Djordjević, Vesna and Tomašević, Igor",
year = "2019",
abstract = "Dairy consumption studies or life cycle assessment of dairy products have been in research focus for several years providing useful information. However, limited number of studies confronted the two types of data in order to analyze environmental impacts associated with consumers. The objective of this research was to calculate these impacts, namely global warming potential (GWP), ozone depletion potential (ODP), cumulative energy demand (CED), acidification potential (AP) and eutrophication potential (EP) related to the consumption of milk and yogurt in Serbia.In the present paper, life cycle assessment study was performed using data from nine dairy farms and ten dairy plants. The system boundary applied is cradle-to-retail comprising data from cow farms, raw milk transportation, processing and transportation of dairy products. In parallel, a survey on the consumption of milk and yogurt was conducted analyzing responses from 957 dairy product consumers. It was found that milk production is responsible for the emission of 1.511 kg CO2(e)/kg of milk, 7.720 MJe/kg, 0.1363 mg R11e/kg, 12.164 g SO2(e)/kg and 17.825 g PO4e/kg while the results for yogurt are slightly higher 1.672 kg CO2(e)/kg, 7.804 7.720 MJe/kg, 0.1369 mg R11e/kg, 12.238 g SO2(e)/kg and 17.609 g PO4e/kg. Further calculations also revealed that weekly emission of GWP, CED, ODP, AP and EP associated with an average consumer of milk and/or yogurt in Serbia was estimated at values of 2.254 kg CO2e/week, 10.926 MJ(e)/week, 0.19261 mg R11(e)/week, 17.191 g SO2e/week and 24.363 g PO4e/week.These results may be of interest to all actors in the dairy chain giving them a wider perspective of sustainable consumption of dairy products.",
publisher = "Elsevier, Amsterdam",
journal = "Science of the Total Environment",
title = "Main environmental impacts associated with production and consumption of milk and yogurt in Serbia - Monte Carlo approach",
volume = "695",
doi = "10.1016/j.scitotenv.2019.133917"
}

Đekić, I., Petrović, J., Božičković, A., Djordjević, V.,& Tomašević, I.. (2019). Main environmental impacts associated with production and consumption of milk and yogurt in Serbia - Monte Carlo approach. in Science of the Total Environment
Elsevier, Amsterdam., 695.
https://doi.org/10.1016/j.scitotenv.2019.133917

Đekić I, Petrović J, Božičković A, Djordjević V, Tomašević I. Main environmental impacts associated with production and consumption of milk and yogurt in Serbia - Monte Carlo approach. in Science of the Total Environment. 2019;695.
doi:10.1016/j.scitotenv.2019.133917 .

Đekić, Ilija, Petrović, Jelena, Božičković, Aleksa, Djordjević, Vesna, Tomašević, Igor, "Main environmental impacts associated with production and consumption of milk and yogurt in Serbia - Monte Carlo approach" in Science of the Total Environment, 695 (2019),
https://doi.org/10.1016/j.scitotenv.2019.133917 . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Simić, Aleksandar
AU  - Grubić, Goran
AU  - Božičković, Aleksa
AU  - Krga, Ivan
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4864
AB  - A cutting experiment was conducted to test the changes in botanical composition, yield and nutritional value of forage, obtained in conditions of simulated rotational spring grazing on permanent grassland. The experiment was carried out on permanent pasture in vicinity of Šabac, Serbia in 2015 included three cuttings as a simulated rotational spring grazing. The highest share of grasses was noted in the first cut and decreased in the second and third cut, with increased forbs participation, and relatively constant percentage of legumes. The highest dry matter (DM) yield was obtained for the first harvest, followed by the second cut, and the lowest forage production was determined for the third harvest, with only 11.04 and 17.42% of the first and second cut yield. There were not found the significant differences between cuts for herbage DM and crude protein content. Markedly lower value for non-protein N concentration (p lt 0.05) was determined in the third cut. The fiber content increased during the grazing season (p lt 0.05), with the highest value determined in the herbage obtained in the second cut. The highest energy values (p lt 0.05) had the herbage produced in the first cut (DM basis), wherein the lowest values were found in the forage from the second harvest. These results indicate that especially herbage yield of analyzed grassland as chemical composition and nutrition value are highly variable during the growing season. The accurately defined optimal period for using is necessary to provide the high-quality forage for grazing animals.
AB  - Istraživanje u kome je košenjem simulirana pregonska ispaša, sprovedeno je u cilju utvrđivanja razlika u botaničkom sastavu, prinosu i hranljivoj vrednosti dobijene zelene mase sa permanentnog pašnjaka, tokom prolećne sezone. Eksperiment je izveden tokom 2015. godine na prirodnom pašnjaku u okolini Šapca, Srbija i uključivao je tri otkosa kao simulaciju pregonske prolećne ispaše. Najveći udeo trava je zabeležen u prvom otkosu, dok je zastupljenost trava u drugom i trećem otkosu bila smanjena, uz istovremeno povećanje učešća zeljanica, i relativno ujednačen udeo leguminoza po ciklusima iskorišćavanja. Najveći prinos suve materije (SM) je utvrđen u prvom ciklusu iskorišćavanja, zatim u drugom, dok je najmanja produkcija zelene mase izmerena u trećem otkosu, samo 11,04 i 17,42% prinosa u prvom odnosno drugom otkosu. Nisu nađene značajne razlike između ciklusa iskorišćavanja u pogledu sadržaja SM i sirovih proteina. Značajno manje učešće neproteinskog N (p lt 0,05) je utvrđeno u biljnoj masi dobijenoj iz trećeg otkosa. Determinisano je povećanje sadržaja vlakana (p lt 0,05) u SM biljne mase, tokom pašne sezone, pri čemu su najveće vrednosti utvrđene u drugom otkosu. Najveću energetsku vrednost (p lt 0,05) imala je zelena krma iz prvog otkosa (u SM), pri čemu je najniži sadržaj iskoristive energije utvrđen u zelenoj masi dobijenoj iz drugog ciklusa iskorišćavanja. Rezultati do kojih se došlo, ukazuju na naročito izraženo variranje prinosa, kao i hemijskog sastava i hranljive vrednosti zelene mase sa permanentnog pašnjaka, tokom prolećne sezone porasta vegetacije. U skladu sa tim, u cilju dobijanja kvalitetne paše za ishranu životinja, neophodno je precizno definisanje optimalnog perioda za iskorišćavanje pašnjaka tokom sezone ispaše.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Yield and nutritional value of permanent grassland forage under simulated rotational grazing
T1  - Prinos i hranljiva vrednost zelene mase sa permanentnog travnjaka u uslovima simulacije prolećne ispaše
EP  - 31
IS  - 1
SP  - 21
VL  - 34
DO  - 10.2298/bah1801021S
ER  - 

@article{
author = "Stojanović, Bojan and Simić, Aleksandar and Grubić, Goran and Božičković, Aleksa and Krga, Ivan",
year = "2018",
abstract = "A cutting experiment was conducted to test the changes in botanical composition, yield and nutritional value of forage, obtained in conditions of simulated rotational spring grazing on permanent grassland. The experiment was carried out on permanent pasture in vicinity of Šabac, Serbia in 2015 included three cuttings as a simulated rotational spring grazing. The highest share of grasses was noted in the first cut and decreased in the second and third cut, with increased forbs participation, and relatively constant percentage of legumes. The highest dry matter (DM) yield was obtained for the first harvest, followed by the second cut, and the lowest forage production was determined for the third harvest, with only 11.04 and 17.42% of the first and second cut yield. There were not found the significant differences between cuts for herbage DM and crude protein content. Markedly lower value for non-protein N concentration (p lt 0.05) was determined in the third cut. The fiber content increased during the grazing season (p lt 0.05), with the highest value determined in the herbage obtained in the second cut. The highest energy values (p lt 0.05) had the herbage produced in the first cut (DM basis), wherein the lowest values were found in the forage from the second harvest. These results indicate that especially herbage yield of analyzed grassland as chemical composition and nutrition value are highly variable during the growing season. The accurately defined optimal period for using is necessary to provide the high-quality forage for grazing animals., Istraživanje u kome je košenjem simulirana pregonska ispaša, sprovedeno je u cilju utvrđivanja razlika u botaničkom sastavu, prinosu i hranljivoj vrednosti dobijene zelene mase sa permanentnog pašnjaka, tokom prolećne sezone. Eksperiment je izveden tokom 2015. godine na prirodnom pašnjaku u okolini Šapca, Srbija i uključivao je tri otkosa kao simulaciju pregonske prolećne ispaše. Najveći udeo trava je zabeležen u prvom otkosu, dok je zastupljenost trava u drugom i trećem otkosu bila smanjena, uz istovremeno povećanje učešća zeljanica, i relativno ujednačen udeo leguminoza po ciklusima iskorišćavanja. Najveći prinos suve materije (SM) je utvrđen u prvom ciklusu iskorišćavanja, zatim u drugom, dok je najmanja produkcija zelene mase izmerena u trećem otkosu, samo 11,04 i 17,42% prinosa u prvom odnosno drugom otkosu. Nisu nađene značajne razlike između ciklusa iskorišćavanja u pogledu sadržaja SM i sirovih proteina. Značajno manje učešće neproteinskog N (p lt 0,05) je utvrđeno u biljnoj masi dobijenoj iz trećeg otkosa. Determinisano je povećanje sadržaja vlakana (p lt 0,05) u SM biljne mase, tokom pašne sezone, pri čemu su najveće vrednosti utvrđene u drugom otkosu. Najveću energetsku vrednost (p lt 0,05) imala je zelena krma iz prvog otkosa (u SM), pri čemu je najniži sadržaj iskoristive energije utvrđen u zelenoj masi dobijenoj iz drugog ciklusa iskorišćavanja. Rezultati do kojih se došlo, ukazuju na naročito izraženo variranje prinosa, kao i hemijskog sastava i hranljive vrednosti zelene mase sa permanentnog pašnjaka, tokom prolećne sezone porasta vegetacije. U skladu sa tim, u cilju dobijanja kvalitetne paše za ishranu životinja, neophodno je precizno definisanje optimalnog perioda za iskorišćavanje pašnjaka tokom sezone ispaše.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Yield and nutritional value of permanent grassland forage under simulated rotational grazing, Prinos i hranljiva vrednost zelene mase sa permanentnog travnjaka u uslovima simulacije prolećne ispaše",
pages = "31-21",
number = "1",
volume = "34",
doi = "10.2298/bah1801021S"
}

Stojanović, B., Simić, A., Grubić, G., Božičković, A.,& Krga, I.. (2018). Yield and nutritional value of permanent grassland forage under simulated rotational grazing. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 34(1), 21-31.
https://doi.org/10.2298/bah1801021S

Stojanović B, Simić A, Grubić G, Božičković A, Krga I. Yield and nutritional value of permanent grassland forage under simulated rotational grazing. in Biotechnology in Animal Husbandry. 2018;34(1):21-31.
doi:10.2298/bah1801021S .

Stojanović, Bojan, Simić, Aleksandar, Grubić, Goran, Božičković, Aleksa, Krga, Ivan, "Yield and nutritional value of permanent grassland forage under simulated rotational grazing" in Biotechnology in Animal Husbandry, 34, no. 1 (2018):21-31,
https://doi.org/10.2298/bah1801021S . .

TY  - JOUR
AU  - Božičković, Aleksa
AU  - Simić, Aleksandar
AU  - Grubić, Goran
AU  - Znidarsić, Tomaz
AU  - Djordjević, Nenad
AU  - Stojanović, Bojan
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4173
AB  - For all crop species, an accurate, quick, and simple method for determination of mean development stage of plants has a key role for scientific and practical use. The investigation was performed to validate a modified methodology for determination of mean stage of development in alfalfa (Medicago sativa L.). The modified methodology, mean stage by fresh weight (MSFW), assumes that mean stage by weight (MSW) could be determined by fresh, and not only by dry weight, as was required by the original methodology. A total of 198 alfalfa samples were collected in 2010 and 2011. Sampling completely covered three growth cycles: spring growth and first and second regrowths. The correlation (r) between MSW and MSFW was >0.99. In 92% of samples, absolute deviation between MSW and MSFW was  lt 0.15 on a scale between 0 and 9. The equation for prediction of MSFW based on measured MSW, MSFW-predicted = 0.9808. MSW, was developed with the data from the first year (n = 141) and tested with second-year samples (n = 57). Prediction error, expressed by root mean squared deviation (RMSD), was 0.045, while components of mean squared deviation (MSD), such as squared bias (SB), nonunity slope (NU), and lack of correlation (LC), were 8.12 x 10(-4), 5.45 x 10(-4), and 6.67 x 10(-4), respectively. Values close to zero in all three MSD components show that validation line had a approximate to 0, b approximate to 1, and r(2) approximate to 1. As a simpler methodology, MSFW gives an opportunity to be more applicable in practice with all of the benefits of the MSW methodology.
PB  - Wiley, Hoboken
T2  - Crop Science
T1  - Testing of a Modified Methodology for Determination of Mean Stage of Development in Alfalfa
EP  - 898
IS  - 2
SP  - 891
VL  - 56
DO  - 10.2135/cropsci2015.03.0156
ER  - 

@article{
author = "Božičković, Aleksa and Simić, Aleksandar and Grubić, Goran and Znidarsić, Tomaz and Djordjević, Nenad and Stojanović, Bojan",
year = "2016",
abstract = "For all crop species, an accurate, quick, and simple method for determination of mean development stage of plants has a key role for scientific and practical use. The investigation was performed to validate a modified methodology for determination of mean stage of development in alfalfa (Medicago sativa L.). The modified methodology, mean stage by fresh weight (MSFW), assumes that mean stage by weight (MSW) could be determined by fresh, and not only by dry weight, as was required by the original methodology. A total of 198 alfalfa samples were collected in 2010 and 2011. Sampling completely covered three growth cycles: spring growth and first and second regrowths. The correlation (r) between MSW and MSFW was >0.99. In 92% of samples, absolute deviation between MSW and MSFW was  lt 0.15 on a scale between 0 and 9. The equation for prediction of MSFW based on measured MSW, MSFW-predicted = 0.9808. MSW, was developed with the data from the first year (n = 141) and tested with second-year samples (n = 57). Prediction error, expressed by root mean squared deviation (RMSD), was 0.045, while components of mean squared deviation (MSD), such as squared bias (SB), nonunity slope (NU), and lack of correlation (LC), were 8.12 x 10(-4), 5.45 x 10(-4), and 6.67 x 10(-4), respectively. Values close to zero in all three MSD components show that validation line had a approximate to 0, b approximate to 1, and r(2) approximate to 1. As a simpler methodology, MSFW gives an opportunity to be more applicable in practice with all of the benefits of the MSW methodology.",
publisher = "Wiley, Hoboken",
journal = "Crop Science",
title = "Testing of a Modified Methodology for Determination of Mean Stage of Development in Alfalfa",
pages = "898-891",
number = "2",
volume = "56",
doi = "10.2135/cropsci2015.03.0156"
}

Božičković, A., Simić, A., Grubić, G., Znidarsić, T., Djordjević, N.,& Stojanović, B.. (2016). Testing of a Modified Methodology for Determination of Mean Stage of Development in Alfalfa. in Crop Science
Wiley, Hoboken., 56(2), 891-898.
https://doi.org/10.2135/cropsci2015.03.0156

Božičković A, Simić A, Grubić G, Znidarsić T, Djordjević N, Stojanović B. Testing of a Modified Methodology for Determination of Mean Stage of Development in Alfalfa. in Crop Science. 2016;56(2):891-898.
doi:10.2135/cropsci2015.03.0156 .

Božičković, Aleksa, Simić, Aleksandar, Grubić, Goran, Znidarsić, Tomaz, Djordjević, Nenad, Stojanović, Bojan, "Testing of a Modified Methodology for Determination of Mean Stage of Development in Alfalfa" in Crop Science, 56, no. 2 (2016):891-898,
https://doi.org/10.2135/cropsci2015.03.0156 . .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Dinić, Bora
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3936
AB  - The results of ensiling of various byproducts of crops, vegetables, food and vine industry are shown in the article. These products are ensiled because of their high moisture content, while their nitrogen content is increased by mixing them with fresh lucerne or its hay, or non-protein nitrogen (NPN) compounds are added. The results of domestic experiments show that better results are achieved when lucerne was added, considering lower pH values and lower amounts of ammonia and soluble nitrogen in the produced silages. However, when grape pomace was ensiled in September the problem is low availability of lucerne and that is why NPN compounds are utilized. When they are used the amount of soluble nitrogen matters in silage is increased, which may cause some negative influence on production, health and fertility in ruminants.
AB  - U radu su prikazani rezultati siliranja različitih pratećih proizvoda ratarstva, povrtarstva, prehrambene industrije i vinarija. Navedeni proizvodi se, zbog visokog sadržaja vlage, konzervišu siliranjem a u cilju povećanja sadržaja sirovih proteina vrši se njihovo kombinovanje sa zelenom lucerkom i lucerkinim senom, ili se dodaju NPN jedinjenja. Rezultati domaćih eksperimenata pokazuju da se pri upotrebi lucerke dobijaju bolji rezultati u pogledu kvaliteta silaža, odnosno manje pH vrednosti i manje količine amonijačnog i rastvorljivog azota. Međutim, pri siliranju komine grožđa u septembru mesecu, javlja se problem zbog malih količina lucerke, zbog čega se koriste NPN jedinjenja. Njihovom upotrebom povećava se količina rastvorljivih azotnih materija u silaži, što može biti problem za proizvodnost, zdravlje i plodnost preživara.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Improvement of silages prepared from byproducts with natural or synthetic nitrogen sources
T1  - Oplemenjivanje silaže od pratećih proizvoda upotrebom prirodnih ili sintetičkih izvora azota
EP  - 72
IS  - 3-4
SP  - 65
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3936
ER  - 

@article{
author = "Djordjević, Nenad and Dinić, Bora and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa",
year = "2015",
abstract = "The results of ensiling of various byproducts of crops, vegetables, food and vine industry are shown in the article. These products are ensiled because of their high moisture content, while their nitrogen content is increased by mixing them with fresh lucerne or its hay, or non-protein nitrogen (NPN) compounds are added. The results of domestic experiments show that better results are achieved when lucerne was added, considering lower pH values and lower amounts of ammonia and soluble nitrogen in the produced silages. However, when grape pomace was ensiled in September the problem is low availability of lucerne and that is why NPN compounds are utilized. When they are used the amount of soluble nitrogen matters in silage is increased, which may cause some negative influence on production, health and fertility in ruminants., U radu su prikazani rezultati siliranja različitih pratećih proizvoda ratarstva, povrtarstva, prehrambene industrije i vinarija. Navedeni proizvodi se, zbog visokog sadržaja vlage, konzervišu siliranjem a u cilju povećanja sadržaja sirovih proteina vrši se njihovo kombinovanje sa zelenom lucerkom i lucerkinim senom, ili se dodaju NPN jedinjenja. Rezultati domaćih eksperimenata pokazuju da se pri upotrebi lucerke dobijaju bolji rezultati u pogledu kvaliteta silaža, odnosno manje pH vrednosti i manje količine amonijačnog i rastvorljivog azota. Međutim, pri siliranju komine grožđa u septembru mesecu, javlja se problem zbog malih količina lucerke, zbog čega se koriste NPN jedinjenja. Njihovom upotrebom povećava se količina rastvorljivih azotnih materija u silaži, što može biti problem za proizvodnost, zdravlje i plodnost preživara.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Improvement of silages prepared from byproducts with natural or synthetic nitrogen sources, Oplemenjivanje silaže od pratećih proizvoda upotrebom prirodnih ili sintetičkih izvora azota",
pages = "72-65",
number = "3-4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3936"
}

Djordjević, N., Dinić, B., Grubić, G., Stojanović, B.,& Božičković, A.. (2015). Improvement of silages prepared from byproducts with natural or synthetic nitrogen sources. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 21(3-4), 65-72.
https://hdl.handle.net/21.15107/rcub_agrospace_3936

Djordjević N, Dinić B, Grubić G, Stojanović B, Božičković A. Improvement of silages prepared from byproducts with natural or synthetic nitrogen sources. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2015;21(3-4):65-72.
https://hdl.handle.net/21.15107/rcub_agrospace_3936 .

Djordjević, Nenad, Dinić, Bora, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, "Improvement of silages prepared from byproducts with natural or synthetic nitrogen sources" in Zbornik naučnih radova Instituta PKB Agroekonomik, 21, no. 3-4 (2015):65-72,
https://hdl.handle.net/21.15107/rcub_agrospace_3936 .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3944
AB  - In paper there were considered principles and characteristics of pasture utilization in dairy cattle nutrition and significant factors that affect pasture intake. The effects of supplementary nutrition on production performances of dairy cows were also considered. Milk yield of dairy cows on pasture is limited with inability for DM and energy intake to meet requirements for high milk yield, and by imbalance of fermentable carbohydrates and rumen degradable protein. Intake of DM of the grazing dairy cows may reach 3.25-3.5%o BW. On high quality pasture, energy intake from pasture can meet requirements of dairy cows for milk production of 21-24 kg/day. Crude protein content in consumed pasture meets requirements of dairy cows for 17-33% higher milk yield relative to supplied energy from intake pasture. Milk production increases with the amount of concentrate supplementation up to 10 kg DM/day, as also milk fat and protein yield, while milk fat percentage decreases.
AB  - U radu su razmatrani osnovni principi i karakteristike korišćenja paše u ishrani muznih krava, kao i najznačajniji faktori od kojih zavisi mogućnost konzumiranja paše. Razmatran je uticaj dopunske ishrane na konzumiranje paše i proizvodne performanse muznih krava. Prinos mleka kod krava na paši ograničen je nemogućnošću da konzumiraju dovoljno suve materije (SM) i energije za visoku proizvodnju mleka, i neizbalansiranošću fermentabilnih ugljenih hidrata i proteina razgradivih u rumenu. Konzumiranje SM kod krava na paši može dostići 3,25-3,5% TM. U uslovima kvalitetne ispaše, količina konzumirane energije iz paše može podmiriti potrebe krava za proizvodnju mleka od 21-24 kg/dan. Sadržaj proteina u konzumiranoj paši obezbeđuje potrebe krava u laktaciji za 17­33% veću proizvodnju mleka, u odnosu na količinu obezbeđene energije. Prinos mleka kod krava na paši se povećava sa dodatom kolicinom koncentrovane hrane u obroku do 10 kgSM/dan, kao i prinos mlečne masti i proteina, dok se sadržaj masti u mleku smanjuje.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Pasture in dairy cows nutrition
T1  - Paša u ishrani muznih krava
EP  - 64
IS  - 3-4
SP  - 55
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3944
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2015",
abstract = "In paper there were considered principles and characteristics of pasture utilization in dairy cattle nutrition and significant factors that affect pasture intake. The effects of supplementary nutrition on production performances of dairy cows were also considered. Milk yield of dairy cows on pasture is limited with inability for DM and energy intake to meet requirements for high milk yield, and by imbalance of fermentable carbohydrates and rumen degradable protein. Intake of DM of the grazing dairy cows may reach 3.25-3.5%o BW. On high quality pasture, energy intake from pasture can meet requirements of dairy cows for milk production of 21-24 kg/day. Crude protein content in consumed pasture meets requirements of dairy cows for 17-33% higher milk yield relative to supplied energy from intake pasture. Milk production increases with the amount of concentrate supplementation up to 10 kg DM/day, as also milk fat and protein yield, while milk fat percentage decreases., U radu su razmatrani osnovni principi i karakteristike korišćenja paše u ishrani muznih krava, kao i najznačajniji faktori od kojih zavisi mogućnost konzumiranja paše. Razmatran je uticaj dopunske ishrane na konzumiranje paše i proizvodne performanse muznih krava. Prinos mleka kod krava na paši ograničen je nemogućnošću da konzumiraju dovoljno suve materije (SM) i energije za visoku proizvodnju mleka, i neizbalansiranošću fermentabilnih ugljenih hidrata i proteina razgradivih u rumenu. Konzumiranje SM kod krava na paši može dostići 3,25-3,5% TM. U uslovima kvalitetne ispaše, količina konzumirane energije iz paše može podmiriti potrebe krava za proizvodnju mleka od 21-24 kg/dan. Sadržaj proteina u konzumiranoj paši obezbeđuje potrebe krava u laktaciji za 17­33% veću proizvodnju mleka, u odnosu na količinu obezbeđene energije. Prinos mleka kod krava na paši se povećava sa dodatom kolicinom koncentrovane hrane u obroku do 10 kgSM/dan, kao i prinos mlečne masti i proteina, dok se sadržaj masti u mleku smanjuje.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Pasture in dairy cows nutrition, Paša u ishrani muznih krava",
pages = "64-55",
number = "3-4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3944"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2015). Pasture in dairy cows nutrition. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 21(3-4), 55-64.
https://hdl.handle.net/21.15107/rcub_agrospace_3944

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Pasture in dairy cows nutrition. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2015;21(3-4):55-64.
https://hdl.handle.net/21.15107/rcub_agrospace_3944 .

Stojanović, Bojan, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, Aleksandra, "Pasture in dairy cows nutrition" in Zbornik naučnih radova Instituta PKB Agroekonomik, 21, no. 3-4 (2015):55-64,
https://hdl.handle.net/21.15107/rcub_agrospace_3944 .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Dinić, Bora
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
AU  - Dubljević, Radislav
AU  - Mitrović, Dragoljub
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3934
AB  - The results of experiments where lucerne, maize, sunflower and sorghum were ensiled and the importance of compression level on the quality of obtained silages were presented in the paper. Level of compression is more important in silages with higher dry matter content, with more mature material which is also cut in longer particles. With the higher level of silage mass compression the higher degree of anaerobic condition is provided and therefore higher production of lactic acid with lower production of acetic acid, which results in lower pH values. With higher compression of silages the total loss of nutrients is reduced, although it may be higher when moisture content is higher. That is why with perennial legumes and grasses it is better to wilt the material, while maize and sorghum are cut at the optimum maturity phase, prior to ensiling.
AB  - U radu su prikazani rezultati eksperimenata siliranja lucerke, kukuruza, suncokreta i sirka, i značaj stepena sabijenosti za kvalitet silaža od različitog materijala. Stepen kompresije je utoliko značajniji ukoliko materijal koji se silira ima veći sadržaj suve materije, potiče od zrelijeg materijala i krupnije je seckan. Pri većem stepenu sabijanja silomase u startu se obezbeđuje veći stepen anaerobnosti, te je veća produkcija mlečne i manja produkcija sirćetne kiseline, odnosno potižu se niže pH vrednosti. Pri boljem stepenu sabijenosti smanjuju se i ukupni gubici u hranljivim materijama, mada oni mogu da budu veći kod vlažnijeg materijala. Zato se kod višegodišnjih leguminoza i trava vrši provenjavanje a za kukuruz, suncokret i sirak siliranje se obavlja u optimalnoj fazi zrelosti.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - The importance of compression level as a factor in silage quality
T1  - Značaj stepena sabijenosti kao faktora kvaliteta silaže
EP  - 80
IS  - 3-4
SP  - 73
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3934
ER  - 

@article{
author = "Djordjević, Nenad and Dinić, Bora and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa and Dubljević, Radislav and Mitrović, Dragoljub",
year = "2015",
abstract = "The results of experiments where lucerne, maize, sunflower and sorghum were ensiled and the importance of compression level on the quality of obtained silages were presented in the paper. Level of compression is more important in silages with higher dry matter content, with more mature material which is also cut in longer particles. With the higher level of silage mass compression the higher degree of anaerobic condition is provided and therefore higher production of lactic acid with lower production of acetic acid, which results in lower pH values. With higher compression of silages the total loss of nutrients is reduced, although it may be higher when moisture content is higher. That is why with perennial legumes and grasses it is better to wilt the material, while maize and sorghum are cut at the optimum maturity phase, prior to ensiling., U radu su prikazani rezultati eksperimenata siliranja lucerke, kukuruza, suncokreta i sirka, i značaj stepena sabijenosti za kvalitet silaža od različitog materijala. Stepen kompresije je utoliko značajniji ukoliko materijal koji se silira ima veći sadržaj suve materije, potiče od zrelijeg materijala i krupnije je seckan. Pri većem stepenu sabijanja silomase u startu se obezbeđuje veći stepen anaerobnosti, te je veća produkcija mlečne i manja produkcija sirćetne kiseline, odnosno potižu se niže pH vrednosti. Pri boljem stepenu sabijenosti smanjuju se i ukupni gubici u hranljivim materijama, mada oni mogu da budu veći kod vlažnijeg materijala. Zato se kod višegodišnjih leguminoza i trava vrši provenjavanje a za kukuruz, suncokret i sirak siliranje se obavlja u optimalnoj fazi zrelosti.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "The importance of compression level as a factor in silage quality, Značaj stepena sabijenosti kao faktora kvaliteta silaže",
pages = "80-73",
number = "3-4",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3934"
}

Djordjević, N., Dinić, B., Grubić, G., Stojanović, B., Božičković, A., Dubljević, R.,& Mitrović, D.. (2015). The importance of compression level as a factor in silage quality. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 21(3-4), 73-80.
https://hdl.handle.net/21.15107/rcub_agrospace_3934

Djordjević N, Dinić B, Grubić G, Stojanović B, Božičković A, Dubljević R, Mitrović D. The importance of compression level as a factor in silage quality. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2015;21(3-4):73-80.
https://hdl.handle.net/21.15107/rcub_agrospace_3934 .

Djordjević, Nenad, Dinić, Bora, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, Dubljević, Radislav, Mitrović, Dragoljub, "The importance of compression level as a factor in silage quality" in Zbornik naučnih radova Instituta PKB Agroekonomik, 21, no. 3-4 (2015):73-80,
https://hdl.handle.net/21.15107/rcub_agrospace_3934 .

TY  - CONF
AU  - Stojanović, B
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Ivetić, A
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5543
AB  - The objective of this paper was to consider the effect of supplementary feeding of grazing dairy cows on dry matter intake (DMI), milk production and milk composition. Accurate estimations of total DMI and pasture DMI are important to the management of dairy grazing systems. The intakes of dry matter (DM) and net energy-NEL are lower on the pasture-only diet compared with cows supplementary fed with concentrate. Many pasture factors affect DMI, including pregrazing pasture mass and pasture allowance. Milk production of high producing grazing dairy cows in early lactation increases linearly as the amount of concentrate increases to 10 kg DM/day with a milk response of 1 kg milk/kg concentrate. In late lactation, increases are with a lower milk response per kilogram of supplemented concentrate. With the amount of concentrate supplementation, milk fat and protein yield increase while milk fat percentage decreases. Supplementation with rumen undegradable protein (RUP) is important for meeting requirements of grazing dairy cows, because the pasture has high ruminal crude protein (CP) degradability. Corn silage supplementation to grazing cows may increase milk production if pasture offered is restricted, but if pasture is offered ad libitum milk production does not change or can decrease. Supplementation of ruminally inert fat could have positive effect on milk production with concentrate supplemented at a lower rate.
C3  - International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia
T1  - Supplementary Feeding of Grazing Dairy Cows
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5543
ER  - 

@conference{
author = "Stojanović, B and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, A",
year = "2014",
abstract = "The objective of this paper was to consider the effect of supplementary feeding of grazing dairy cows on dry matter intake (DMI), milk production and milk composition. Accurate estimations of total DMI and pasture DMI are important to the management of dairy grazing systems. The intakes of dry matter (DM) and net energy-NEL are lower on the pasture-only diet compared with cows supplementary fed with concentrate. Many pasture factors affect DMI, including pregrazing pasture mass and pasture allowance. Milk production of high producing grazing dairy cows in early lactation increases linearly as the amount of concentrate increases to 10 kg DM/day with a milk response of 1 kg milk/kg concentrate. In late lactation, increases are with a lower milk response per kilogram of supplemented concentrate. With the amount of concentrate supplementation, milk fat and protein yield increase while milk fat percentage decreases. Supplementation with rumen undegradable protein (RUP) is important for meeting requirements of grazing dairy cows, because the pasture has high ruminal crude protein (CP) degradability. Corn silage supplementation to grazing cows may increase milk production if pasture offered is restricted, but if pasture is offered ad libitum milk production does not change or can decrease. Supplementation of ruminally inert fat could have positive effect on milk production with concentrate supplemented at a lower rate.",
journal = "International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia",
title = "Supplementary Feeding of Grazing Dairy Cows",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5543"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2014). Supplementary Feeding of Grazing Dairy Cows. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia.
https://hdl.handle.net/21.15107/rcub_agrospace_5543

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Supplementary Feeding of Grazing Dairy Cows. in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia. 2014;.
https://hdl.handle.net/21.15107/rcub_agrospace_5543 .

Stojanović, B, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, A, "Supplementary Feeding of Grazing Dairy Cows" in International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia (2014),
https://hdl.handle.net/21.15107/rcub_agrospace_5543 .

TY  - THES
AU  - Božičković, Aleksa
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/23
AB  - The investigation was done on 141 samples of one alfalfa (Medicago sativa L.) cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. The following parameters in alfalfa during the whole growth cycle were observed: mean morphological stage and changes in chemical composition and nutritive value. For that purpose a total of 141 samples were collected, actually 72, 35 and 34 samples during the three growth cycles: spring growth, first regrowth and second regrowth. Investigation was carried out in order to obtain mean morphological stage within each growth cycle. Sampling was done during the whole growing period, commencing when plant height was below 150 mm and continuing until plants were bearing ripe seeds, to evaluate chemical composition and nutritive value based on mean morphological stage. Two methods for determination of mean morphological stage were used: Mean Stage by Count (MSC) and Mean Stage by Weight (MSW). The mean morphological stage represents an average value for some morphological parameters based on all shoots collected from randomly selected area. All shoots within the sample were classified in ten morphological stages. These stages were used for determination of mean morphological stage. The hypothesis was that if the most important chemical parameters could be estimated with the mean morphological stage, then its net energy value for ruminants may be calculated with similar level of exactness. In the collected samples both MSC and MSW value were determined and the following analyses were conducted: crude protein (CP), crude ash (CA), ether extract (EE), neutral detergent fibre (aNDF), acid detergent fibre (ADF), acid detergent lignin (ADL), neutral and acid insoluble crude protein (NDICP and ADICP). The in vitro organic matter digestibility (IVOMD) was determined by the means of a gas production technique after 24h incubation in rumen fluid. Based on these chemical parameters in all samples the following values were calculated: cellulose, hemicellulose, nonfibre carbohydrates (NFC), total digestible nutrients (TDN), digestible energy (DE), metabolizable energy (ME) and net energy for lactation (NEL). The continuous increase in MSW value was observed during all growth periods. Within the first cut the decrease in MSC value was observed, due to appearance of young shoots after eight weeks. The appearance of young shoots did not affect MSW since it is calculated on the base of dried weight of an individual morphological stage. The modification of the MSW method was investigated. This modification was based on determining the mean stage value using the fresh weight rather than the dry weight of individual morphological stage. The modified MSW was called Mean Stage by Fresh Weight (MSFW). The difference between MSW and MSFW values was negligible as indicated by the very high correlation coefficient, a regression slope of nearly 1 with intercept 0 and an average absolute difference between paired MSW and MSFW values of only 0·073...
AB  - Na istoj lokaciji, u istoj vegetacionoj sezoni, je ispraćen porast lucerke (Medicago sativa L.) tokom tri prva ciklusa vegetacije (otkosa). Praćene su promene srednje morfološke faze kao i promene hemijskog sastava i hranljive vrednosti lucerke. Zbog toga je sakupljen ukupno 141 uzorak, odnosno 72, 35 i 34 uzorka redom u I, II i III otkosu. Svi otkosi su ispraćeni od početka vegetacije do faze zrenja mahuna. Istraţivanje je sprovedeno sa ciljem utvrđivanja regresionih funkcija za procenu hemijskog sastava i hranljive vrednosti zasnovanih na srednjoj morfološkoj fazi. Ispitane su dve srednje morfološke faze, srednja morfološka faza određena brojanjem – MSC (eng. Mean Stage by Count) i srednja morfološka faza određena na osnovu mase – MSW (eng. Mean Stage by Weight). Srednja morfološka faza predstavlja prosek nekih morfoloških parametara i određuje se na osnovu svih izdanaka (stabljika) na određenoj površini. Sve stabljike sakupljenog uzorka se klasifikuju u deset morfoloških faza na osnovu kojih se određuje srednja morfološka faza. Hipoteza od koje se pošlo je bila: ukoliko se najvaţniji hemijski parametri u lucerki mogu proceniti srednjom morfološkom fazom onda se i njena neto-energetska vrednost moţe proceniti sa sličnom tačnošću. Svim sakupljenim uzorcima je određena MSC i MSW vrednost kao i sledeći hemijski parametri: sirovi protein (SP), sirovi pepeo (SPe), sirove masti (SMa), vlakna nerastvorljiva u neutralnom deterdţentu (aNDF), vlakna nerastvorljiva u kiselom deterdţentu (ADF), lignin (ADL), protein nerastvorljiv u neutralnom deterdţentu (NDICP) i protein nerastvorljiv u kiselom deterdţentu (ADICP). Osim ovih hemijskih parametara, računski su određeni nevlaknasti ugljeni hidrati (NFC), celuloza i hemiceluloza. Na osnovu merenja produkcije gasa u tečnom sadrţaju buraga tokom 24 h, svakom uzorku je određena in vitro svarljivost organske materije (IVSOM). Na osnovu navedenih hemijskih parametara svim uzorcima su određene pravo svarljive hranljive materije (TDN) i sledeće energetske frakcije: svarljiva energija (DE), metabolička energija (ME) i neto energija za laktaciju (NEL). Utvrđen je kontinuiran porast MSW vrednosti tokom svih otkosa. Zbog pojave mladih izdanaka nakon osme nedelje prvog otkosa, utvrđeno je smanjenje MSC vrednosti. Pojava mladih izdanaka nije uticala na MSW vrednost pošto se ona određuje na osnovu suve mase morfoloških faza. Predloţen je modifikovani način utvrđivanja MSW na osnovu sveţe mase umesto suve mase. Modifikovana MSW vrednost je nazvana MSFW (eng. Mean Stage by Fresh Weight). Prosečna razlika između MSW i MSFW je iznosila 0,073 i nije bilo statistički značajne razlike između ovih parametara...
PB  - Univerzitet u Beogradu, Poljoprivredni fakultet
T1  - Evaluation of alfalfa nutritive value in ruminants based on morphological parameters
T1  - Procena hranljive vrednosti lucerke u ishrani preživara na osnovu morfoloških parametara
UR  - https://hdl.handle.net/21.15107/rcub_nardus_2582
ER  - 

@phdthesis{
author = "Božičković, Aleksa",
year = "2014",
abstract = "The investigation was done on 141 samples of one alfalfa (Medicago sativa L.) cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. The following parameters in alfalfa during the whole growth cycle were observed: mean morphological stage and changes in chemical composition and nutritive value. For that purpose a total of 141 samples were collected, actually 72, 35 and 34 samples during the three growth cycles: spring growth, first regrowth and second regrowth. Investigation was carried out in order to obtain mean morphological stage within each growth cycle. Sampling was done during the whole growing period, commencing when plant height was below 150 mm and continuing until plants were bearing ripe seeds, to evaluate chemical composition and nutritive value based on mean morphological stage. Two methods for determination of mean morphological stage were used: Mean Stage by Count (MSC) and Mean Stage by Weight (MSW). The mean morphological stage represents an average value for some morphological parameters based on all shoots collected from randomly selected area. All shoots within the sample were classified in ten morphological stages. These stages were used for determination of mean morphological stage. The hypothesis was that if the most important chemical parameters could be estimated with the mean morphological stage, then its net energy value for ruminants may be calculated with similar level of exactness. In the collected samples both MSC and MSW value were determined and the following analyses were conducted: crude protein (CP), crude ash (CA), ether extract (EE), neutral detergent fibre (aNDF), acid detergent fibre (ADF), acid detergent lignin (ADL), neutral and acid insoluble crude protein (NDICP and ADICP). The in vitro organic matter digestibility (IVOMD) was determined by the means of a gas production technique after 24h incubation in rumen fluid. Based on these chemical parameters in all samples the following values were calculated: cellulose, hemicellulose, nonfibre carbohydrates (NFC), total digestible nutrients (TDN), digestible energy (DE), metabolizable energy (ME) and net energy for lactation (NEL). The continuous increase in MSW value was observed during all growth periods. Within the first cut the decrease in MSC value was observed, due to appearance of young shoots after eight weeks. The appearance of young shoots did not affect MSW since it is calculated on the base of dried weight of an individual morphological stage. The modification of the MSW method was investigated. This modification was based on determining the mean stage value using the fresh weight rather than the dry weight of individual morphological stage. The modified MSW was called Mean Stage by Fresh Weight (MSFW). The difference between MSW and MSFW values was negligible as indicated by the very high correlation coefficient, a regression slope of nearly 1 with intercept 0 and an average absolute difference between paired MSW and MSFW values of only 0·073..., Na istoj lokaciji, u istoj vegetacionoj sezoni, je ispraćen porast lucerke (Medicago sativa L.) tokom tri prva ciklusa vegetacije (otkosa). Praćene su promene srednje morfološke faze kao i promene hemijskog sastava i hranljive vrednosti lucerke. Zbog toga je sakupljen ukupno 141 uzorak, odnosno 72, 35 i 34 uzorka redom u I, II i III otkosu. Svi otkosi su ispraćeni od početka vegetacije do faze zrenja mahuna. Istraţivanje je sprovedeno sa ciljem utvrđivanja regresionih funkcija za procenu hemijskog sastava i hranljive vrednosti zasnovanih na srednjoj morfološkoj fazi. Ispitane su dve srednje morfološke faze, srednja morfološka faza određena brojanjem – MSC (eng. Mean Stage by Count) i srednja morfološka faza određena na osnovu mase – MSW (eng. Mean Stage by Weight). Srednja morfološka faza predstavlja prosek nekih morfoloških parametara i određuje se na osnovu svih izdanaka (stabljika) na određenoj površini. Sve stabljike sakupljenog uzorka se klasifikuju u deset morfoloških faza na osnovu kojih se određuje srednja morfološka faza. Hipoteza od koje se pošlo je bila: ukoliko se najvaţniji hemijski parametri u lucerki mogu proceniti srednjom morfološkom fazom onda se i njena neto-energetska vrednost moţe proceniti sa sličnom tačnošću. Svim sakupljenim uzorcima je određena MSC i MSW vrednost kao i sledeći hemijski parametri: sirovi protein (SP), sirovi pepeo (SPe), sirove masti (SMa), vlakna nerastvorljiva u neutralnom deterdţentu (aNDF), vlakna nerastvorljiva u kiselom deterdţentu (ADF), lignin (ADL), protein nerastvorljiv u neutralnom deterdţentu (NDICP) i protein nerastvorljiv u kiselom deterdţentu (ADICP). Osim ovih hemijskih parametara, računski su određeni nevlaknasti ugljeni hidrati (NFC), celuloza i hemiceluloza. Na osnovu merenja produkcije gasa u tečnom sadrţaju buraga tokom 24 h, svakom uzorku je određena in vitro svarljivost organske materije (IVSOM). Na osnovu navedenih hemijskih parametara svim uzorcima su određene pravo svarljive hranljive materije (TDN) i sledeće energetske frakcije: svarljiva energija (DE), metabolička energija (ME) i neto energija za laktaciju (NEL). Utvrđen je kontinuiran porast MSW vrednosti tokom svih otkosa. Zbog pojave mladih izdanaka nakon osme nedelje prvog otkosa, utvrđeno je smanjenje MSC vrednosti. Pojava mladih izdanaka nije uticala na MSW vrednost pošto se ona određuje na osnovu suve mase morfoloških faza. Predloţen je modifikovani način utvrđivanja MSW na osnovu sveţe mase umesto suve mase. Modifikovana MSW vrednost je nazvana MSFW (eng. Mean Stage by Fresh Weight). Prosečna razlika između MSW i MSFW je iznosila 0,073 i nije bilo statistički značajne razlike između ovih parametara...",
publisher = "Univerzitet u Beogradu, Poljoprivredni fakultet",
title = "Evaluation of alfalfa nutritive value in ruminants based on morphological parameters, Procena hranljive vrednosti lucerke u ishrani preživara na osnovu morfoloških parametara",
url = "https://hdl.handle.net/21.15107/rcub_nardus_2582"
}

Božičković, A.. (2014). Evaluation of alfalfa nutritive value in ruminants based on morphological parameters. 
Univerzitet u Beogradu, Poljoprivredni fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_2582

Božičković A. Evaluation of alfalfa nutritive value in ruminants based on morphological parameters. 2014;.
https://hdl.handle.net/21.15107/rcub_nardus_2582 .

Božičković, Aleksa, "Evaluation of alfalfa nutritive value in ruminants based on morphological parameters" (2014),
https://hdl.handle.net/21.15107/rcub_nardus_2582 .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, N.
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
AU  - Davidović, Vesna
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3427
AB  - A study was conducted to investigate the effects of a diet particle size on nutrient digestibility in cows in early lactation. Treatments were diets with forage to concentrate ratio 43:57% in diet dry matter, with four different physically effective fibres (peNDF) content based on different cut length of corn silage and alfalfa haylage. The physical effectiveness factors (pef) and peNDF content of TMRs (total mixed ration) were determined using Penn State Particle Separator (PSPS) with two (pef(8.0), peNDF(8.0)) or three (pef(1.18), peNDF(1.18)) sieves. The reducing of cut length of forages and particle size of diets did not affect on dry matter intake, while decreased peNDF intake by 16.34 and 8.83%, for peNDF(8.0) and peNDF(1.18) respectively. Apparent total tract digestibility of the nutrients was measured using two indicators: acid insoluble ash (AIA) and acid detergent insoluble lignin (ADL). Decreasing of forages cut length significantly increased apparent total tract digestibility of neutral detergent fibre (NDF) from 48.39% to 53.84% and from 53.9% to 58.66%, of crude protein from 73.96% to 79.24% and from 71.56% to 77.90%, with contemporary decreasing of non-fibre carbohydrate from 90.89% to 84.81% and from 91.99% to 86.80%, with AIA or ADL as indicator respectively. Dietary value of net energy for lactation (NEL) and energy intake was not affected by the peNDF content of the diet.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Animal Physiology and Animal Nutrition
T1  - Effect of physical effectiveness on digestibility of ration for cows in early lactation
EP  - 721
IS  - 4
SP  - 714
VL  - 98
DO  - 10.1111/jpn.12129
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, N. and Božičković, Aleksa and Ivetić, Aleksandra and Davidović, Vesna",
year = "2014",
abstract = "A study was conducted to investigate the effects of a diet particle size on nutrient digestibility in cows in early lactation. Treatments were diets with forage to concentrate ratio 43:57% in diet dry matter, with four different physically effective fibres (peNDF) content based on different cut length of corn silage and alfalfa haylage. The physical effectiveness factors (pef) and peNDF content of TMRs (total mixed ration) were determined using Penn State Particle Separator (PSPS) with two (pef(8.0), peNDF(8.0)) or three (pef(1.18), peNDF(1.18)) sieves. The reducing of cut length of forages and particle size of diets did not affect on dry matter intake, while decreased peNDF intake by 16.34 and 8.83%, for peNDF(8.0) and peNDF(1.18) respectively. Apparent total tract digestibility of the nutrients was measured using two indicators: acid insoluble ash (AIA) and acid detergent insoluble lignin (ADL). Decreasing of forages cut length significantly increased apparent total tract digestibility of neutral detergent fibre (NDF) from 48.39% to 53.84% and from 53.9% to 58.66%, of crude protein from 73.96% to 79.24% and from 71.56% to 77.90%, with contemporary decreasing of non-fibre carbohydrate from 90.89% to 84.81% and from 91.99% to 86.80%, with AIA or ADL as indicator respectively. Dietary value of net energy for lactation (NEL) and energy intake was not affected by the peNDF content of the diet.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Animal Physiology and Animal Nutrition",
title = "Effect of physical effectiveness on digestibility of ration for cows in early lactation",
pages = "721-714",
number = "4",
volume = "98",
doi = "10.1111/jpn.12129"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A., Ivetić, A.,& Davidović, V.. (2014). Effect of physical effectiveness on digestibility of ration for cows in early lactation. in Journal of Animal Physiology and Animal Nutrition
Wiley-Blackwell, Hoboken., 98(4), 714-721.
https://doi.org/10.1111/jpn.12129

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A, Davidović V. Effect of physical effectiveness on digestibility of ration for cows in early lactation. in Journal of Animal Physiology and Animal Nutrition. 2014;98(4):714-721.
doi:10.1111/jpn.12129 .

Stojanović, Bojan, Grubić, Goran, Djordjević, N., Božičković, Aleksa, Ivetić, Aleksandra, Davidović, Vesna, "Effect of physical effectiveness on digestibility of ration for cows in early lactation" in Journal of Animal Physiology and Animal Nutrition, 98, no. 4 (2014):714-721,
https://doi.org/10.1111/jpn.12129 . .

TY  - JOUR
AU  - Božičković, Aleksa
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Stojanović, Bojan
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3568
AB  - The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. Within each growth cycle, sampling was done during the whole growing period, commencing when plant height was below 150 mm and continuing until plants were bearing ripe seeds. On all collected samples the following cell wall characteristics were determined: neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), neutral detergent insoluble crude protein (NDICP), acid detergent insoluble crude protein (ADICP). Cellulose and hemicellulose were detected on the base of the mentioned chemical parameters. Significantly lower (p lt 0.01) content of aNDF, ADF, ADL, ADICP and cellulose is found in the second regrowth, while there were no significant differences between the other two growth cycles. Except in NDICP and ADICP, the increase in all accompanying components of the cell wall was observed, and expressed in average daily changes. There was no consistent trend in NDICP and ADICP. During the spring growth from late bud to full-bloom stage the 'plateau' was observed. The plateau was represented as almost constant content of aNDF, ADF, ADL and cellulose. The correlations between all components of the cell wall were shown. The equation aNDF = 36.713 + 1.181 × ADF is recommended for conversion of ADF into aNDF in alfalfa.
AB  - Istraživanje je sprovedeno na 141 uzorku iste sorte lucerke, sakupljene na istoj lokaciji tokom prva tri ciklusa vegetacije: prolećni ciklus, drugi ciklus i treći ciklus. Tokom svakog ciklusa, uzorkovanjem je obuhvaćen ceo ciklus vegetacije, od momenta kada su biljke imale visinu manju od 150 mm sve do momenta kada su biljke imale zrelo seme. U svim sakupljenim uzorcima određeni su sledeći parametri ćelijskog zida: vlakna nerastvorljiva u neutralnom deterdžentu (aNDF), vlakna nerastvorljiva u kiselom deterdžentu (ADF), lignin (ADL), protein nerastvorljiv u neutralnom deterdžentu (NDICP), protein nerastvorljiv u kiselom deterdžentu (ADICP). Celuloza i hemiceluloza su određene na osnovu navedenih hemijskih parametara. Utvrđena je značajno manja (p lt 0.01) količina aNDF, ADF, ADL, ADICP i celuloze u trećem ciklusu vegetacije, dok između ostala dva ciklusa nisu utvrđene veće razlike. Izuzev kod NDICP i ADICP, utvrđen je porast svih praćenih komponenata ćelijskog zida i izražen u prosečnim dnevnim promenama. Kod NDICP i ADICP je zabeleženo odsustvo trenda. Tokom prolećnog ciklusa od faze punog pupoljenja do faze punog cvetanja je zabeležen 'plato', odnosno skoro konstantna količina aNDF, ADF, ADL i celuloze. Prikazane su korelacije između svih parametara ćelijskog zida. Jednačina aNDF = 36.713 + 1.181 × ADF je preporučena za konverziju ADF u aNDF u lucerki.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - Changes in alfalfa cell wall structure during vegetation
T1  - Promene u strukturi ćelijskog zida lucerke tokom vegetacije
EP  - 286
IS  - 3
SP  - 275
VL  - 59
DO  - 10.2298/jas1403275b
ER  - 

@article{
author = "Božičković, Aleksa and Grubić, Goran and Djordjević, Nenad and Stojanović, Bojan",
year = "2014",
abstract = "The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. Within each growth cycle, sampling was done during the whole growing period, commencing when plant height was below 150 mm and continuing until plants were bearing ripe seeds. On all collected samples the following cell wall characteristics were determined: neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), neutral detergent insoluble crude protein (NDICP), acid detergent insoluble crude protein (ADICP). Cellulose and hemicellulose were detected on the base of the mentioned chemical parameters. Significantly lower (p lt 0.01) content of aNDF, ADF, ADL, ADICP and cellulose is found in the second regrowth, while there were no significant differences between the other two growth cycles. Except in NDICP and ADICP, the increase in all accompanying components of the cell wall was observed, and expressed in average daily changes. There was no consistent trend in NDICP and ADICP. During the spring growth from late bud to full-bloom stage the 'plateau' was observed. The plateau was represented as almost constant content of aNDF, ADF, ADL and cellulose. The correlations between all components of the cell wall were shown. The equation aNDF = 36.713 + 1.181 × ADF is recommended for conversion of ADF into aNDF in alfalfa., Istraživanje je sprovedeno na 141 uzorku iste sorte lucerke, sakupljene na istoj lokaciji tokom prva tri ciklusa vegetacije: prolećni ciklus, drugi ciklus i treći ciklus. Tokom svakog ciklusa, uzorkovanjem je obuhvaćen ceo ciklus vegetacije, od momenta kada su biljke imale visinu manju od 150 mm sve do momenta kada su biljke imale zrelo seme. U svim sakupljenim uzorcima određeni su sledeći parametri ćelijskog zida: vlakna nerastvorljiva u neutralnom deterdžentu (aNDF), vlakna nerastvorljiva u kiselom deterdžentu (ADF), lignin (ADL), protein nerastvorljiv u neutralnom deterdžentu (NDICP), protein nerastvorljiv u kiselom deterdžentu (ADICP). Celuloza i hemiceluloza su određene na osnovu navedenih hemijskih parametara. Utvrđena je značajno manja (p lt 0.01) količina aNDF, ADF, ADL, ADICP i celuloze u trećem ciklusu vegetacije, dok između ostala dva ciklusa nisu utvrđene veće razlike. Izuzev kod NDICP i ADICP, utvrđen je porast svih praćenih komponenata ćelijskog zida i izražen u prosečnim dnevnim promenama. Kod NDICP i ADICP je zabeleženo odsustvo trenda. Tokom prolećnog ciklusa od faze punog pupoljenja do faze punog cvetanja je zabeležen 'plato', odnosno skoro konstantna količina aNDF, ADF, ADL i celuloze. Prikazane su korelacije između svih parametara ćelijskog zida. Jednačina aNDF = 36.713 + 1.181 × ADF je preporučena za konverziju ADF u aNDF u lucerki.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "Changes in alfalfa cell wall structure during vegetation, Promene u strukturi ćelijskog zida lucerke tokom vegetacije",
pages = "286-275",
number = "3",
volume = "59",
doi = "10.2298/jas1403275b"
}

Božičković, A., Grubić, G., Djordjević, N.,& Stojanović, B.. (2014). Changes in alfalfa cell wall structure during vegetation. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 59(3), 275-286.
https://doi.org/10.2298/jas1403275b

Božičković A, Grubić G, Djordjević N, Stojanović B. Changes in alfalfa cell wall structure during vegetation. in Journal of Agricultural Sciences (Belgrade). 2014;59(3):275-286.
doi:10.2298/jas1403275b .

Božičković, Aleksa, Grubić, Goran, Djordjević, Nenad, Stojanović, Bojan, "Changes in alfalfa cell wall structure during vegetation" in Journal of Agricultural Sciences (Belgrade), 59, no. 3 (2014):275-286,
https://doi.org/10.2298/jas1403275b . .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3664
AB  - Various methods of preparations and use of forage feeds for feeding animals in organic production systems were described in the paper. The base of this review is in the Act about control and certification in organic production and methods of organic production (2011). The main factors responsible for production of such feeds are: conversion (transition) period, methods of soil processing, production of organic fertilizers, use of certified seeds, use and list of allowed preparations for plant protection, feed conservation technology, transport and keeping of feeds, amounts of feed and feeding techniques. The herbivore feeding in organic production systems should be mostly relying on pasture, depending on the availability in various seasons, but also with some limitations which are different from conventional production. In periods without vegetation conserved forage is used - hay and silage. Silage production technology is basically similar to the one used in conventional production, and allows the use of inoculants as fermentation stimulants, and even use of some organic acids in order to rapidly obtain the appropriate pH values. The use of urea for feed supplementation (silage, concentrate) is absolutely forbidden. Considering that the Act about control and certification in organic production and methods of organic production (2011) defines minimal amount of 60% of forages in herbivore feeding, and in milk producing animals it is defined as 50% (in the first 3 months of lactation), even more care should be given to forages compared to conventional systems.
AB  - U radu su prikazani različiti postupci pripremanja voluminozne hrane za domaće životinje u skladu sa principima organske stočarske proizvodnje. Osnovu ovog pregleda i razmatranja čini Pravilnik o kontroli i sertifikaciji u organskoj proizvodnji i metodama organske proizvodnje (2011). Osnovni faktori odgovorni za proizvodnju takve hrane su: period konverzije (prelaska), način obrade zemljišta, priprema organskog đubriva, upotreba sertifikovanog semena, upotreba i lista sredstava za zaštitu bilja, tehnologija konzervisanja hraniva, transport i skladištenje hrane, količine hrane i tehnika ishrane... Ishrana biljojeda u organskoj stočarskoj proizvodnji u najvećoj mogućoj meri treba da se zasniva na ispaši, u zavisnosti od raspoloživosti pašnjaka u različito doba godine, ali i tu postoje određena ograničenja koja je razlikuju od konvencionalne ishrane. U periodu van vegetacije koristi se konzervisana hrana - seno i silaža. Tehnologija spremanja silaže je u osnovi slična kao i za konvencionalnu proizvodnju, i dozvoljava upotrebu inokulanata kao stimulatora fermentacije, pa čak i nekih organskih kiselina u cilju brzog postizanja odgovarajuće pH vrednosti. Upotreba uree kao sredstva za oplemenjivanje hrane (silaže, koncentrata…), apsolutno je zabranjena. S obzirom da je Pravilnikom o kontroli i sertifikaciji u organskoj proizvodnji i metodama organske proizvodnje (2011) definisan minimum učešća suve materije iz kabaste hrane u obrocima za biljojede od 60%, a u u slučaju životinja koje se koriste za proizvodnju mleka najmanje 50% (tokom prva tri meseca laktacije), još veća pažnja se mora pokloniti kvalitetu kabaste hrane.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Forages in organic animal production systems
T1  - Proizvodnja voluminozne hrane po principima organskog stočarstva
EP  - 186
IS  - 1-4
SP  - 175
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3664
ER  - 

@article{
author = "Djordjević, Nenad and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa",
year = "2014",
abstract = "Various methods of preparations and use of forage feeds for feeding animals in organic production systems were described in the paper. The base of this review is in the Act about control and certification in organic production and methods of organic production (2011). The main factors responsible for production of such feeds are: conversion (transition) period, methods of soil processing, production of organic fertilizers, use of certified seeds, use and list of allowed preparations for plant protection, feed conservation technology, transport and keeping of feeds, amounts of feed and feeding techniques. The herbivore feeding in organic production systems should be mostly relying on pasture, depending on the availability in various seasons, but also with some limitations which are different from conventional production. In periods without vegetation conserved forage is used - hay and silage. Silage production technology is basically similar to the one used in conventional production, and allows the use of inoculants as fermentation stimulants, and even use of some organic acids in order to rapidly obtain the appropriate pH values. The use of urea for feed supplementation (silage, concentrate) is absolutely forbidden. Considering that the Act about control and certification in organic production and methods of organic production (2011) defines minimal amount of 60% of forages in herbivore feeding, and in milk producing animals it is defined as 50% (in the first 3 months of lactation), even more care should be given to forages compared to conventional systems., U radu su prikazani različiti postupci pripremanja voluminozne hrane za domaće životinje u skladu sa principima organske stočarske proizvodnje. Osnovu ovog pregleda i razmatranja čini Pravilnik o kontroli i sertifikaciji u organskoj proizvodnji i metodama organske proizvodnje (2011). Osnovni faktori odgovorni za proizvodnju takve hrane su: period konverzije (prelaska), način obrade zemljišta, priprema organskog đubriva, upotreba sertifikovanog semena, upotreba i lista sredstava za zaštitu bilja, tehnologija konzervisanja hraniva, transport i skladištenje hrane, količine hrane i tehnika ishrane... Ishrana biljojeda u organskoj stočarskoj proizvodnji u najvećoj mogućoj meri treba da se zasniva na ispaši, u zavisnosti od raspoloživosti pašnjaka u različito doba godine, ali i tu postoje određena ograničenja koja je razlikuju od konvencionalne ishrane. U periodu van vegetacije koristi se konzervisana hrana - seno i silaža. Tehnologija spremanja silaže je u osnovi slična kao i za konvencionalnu proizvodnju, i dozvoljava upotrebu inokulanata kao stimulatora fermentacije, pa čak i nekih organskih kiselina u cilju brzog postizanja odgovarajuće pH vrednosti. Upotreba uree kao sredstva za oplemenjivanje hrane (silaže, koncentrata…), apsolutno je zabranjena. S obzirom da je Pravilnikom o kontroli i sertifikaciji u organskoj proizvodnji i metodama organske proizvodnje (2011) definisan minimum učešća suve materije iz kabaste hrane u obrocima za biljojede od 60%, a u u slučaju životinja koje se koriste za proizvodnju mleka najmanje 50% (tokom prva tri meseca laktacije), još veća pažnja se mora pokloniti kvalitetu kabaste hrane.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Forages in organic animal production systems, Proizvodnja voluminozne hrane po principima organskog stočarstva",
pages = "186-175",
number = "1-4",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3664"
}

Djordjević, N., Grubić, G., Stojanović, B.,& Božičković, A.. (2014). Forages in organic animal production systems. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 20(1-4), 175-186.
https://hdl.handle.net/21.15107/rcub_agrospace_3664

Djordjević N, Grubić G, Stojanović B, Božičković A. Forages in organic animal production systems. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2014;20(1-4):175-186.
https://hdl.handle.net/21.15107/rcub_agrospace_3664 .

Djordjević, Nenad, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, "Forages in organic animal production systems" in Zbornik naučnih radova Instituta PKB Agroekonomik, 20, no. 1-4 (2014):175-186,
https://hdl.handle.net/21.15107/rcub_agrospace_3664 .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Radivojević, Mihailo
AU  - Božičković, Aleksa
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3383
AB  - The influence of wilting, actually two levels of dry matter content (DM = 250 and 360 gkg-1) and three levels of compaction (460, 550 and 620 gdm-3) on variations in parameters of chemical composition, proteolysis and quality of lucerne silage was investigated. The experiment was set as 2x3 factorial with three replications per each treatment. Based on the results of chemical analysis, there was no significant variation within the contents of basic nutrients (p>0.05), while some variation was observed in lipid and carbohydrate contents. In silages with higher dry matter content the reduction of fermentation was observed, with acetate as dominant product in acid contents in A2B1 treatment, and also reduction in proteolytic processes which shows as lower ammonia and soluble nitrogen content (p lt 0.05). With the increase of level of compaction the increase in lactic acid was observed, with decrease in ammonia and soluble nitrogen (p lt 0.05). In material with natural moisture content, regardless of the level of compaction, the butyric fermentation was observed and intensified aminogenesis. On the basis of this investigation it can be concluded that wilting and adequate compaction are the key physical factors which influence silage quality parameters.
AB  - U radu je ispitivan uticaj provenjavanja, odnosno dva stepena sadržaja suve materije (SM = 250 i 360 gkg-1) i tri stepena sabijenosti (460, 550 i 620 gdm-3) na promene parametara hemijskog sastava, proteolize i kvaliteta silaže lucerke. Eksperiment je postavljen po statističkom modelu 2x3 u tri ponavljanja po svakom tretmanu. Na osnovu rezultata laboratorijskih analiza, utvrđeno je nesignifikantno variranje u sadržaju pojedinih hranljivih materija (p>0,05), izuzev masti i ugljenih hidrata. U silažama sa većim stepenom suve materije utvrđena je redukcija fermentacije, sa dominacijom sirćetne u ukupnom sadržaju kiselina u tretmanu A2B1, kao i redukcija proteolitičkih procesa, odnosno manji sadržaj amonijaka i rastvorljivog zota (p lt 0,05). Sa povećanjem stepena sabijenosti došlo je do porasta apsolutnog udela mlečne kiseline i smanjenja udela amonijačnog i rastvorljivog azota (p lt 0,05). U materijalu sa prirodnim sadržajem vlage, bez obzira na stepen sabijanja, došlo je do buterne fermentacije i intenziviranja aminogeneze. Na osnovu izvedenih ispitivanja može se zaključiti da su provenjavanje i adekvatno sabijanje ključni fizički faktori za parametre kvaliteta silaže lucerke.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage
T1  - Uticaj provenjavanja i stepena sabijenosti na parametre hemijskog sastava, proteolize i kvaliteta silaže lucerke
EP  - 46
IS  - 3-4
SP  - 39
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3383
ER  - 

@article{
author = "Djordjević, Nenad and Grubić, Goran and Stojanović, Bojan and Radivojević, Mihailo and Božičković, Aleksa",
year = "2013",
abstract = "The influence of wilting, actually two levels of dry matter content (DM = 250 and 360 gkg-1) and three levels of compaction (460, 550 and 620 gdm-3) on variations in parameters of chemical composition, proteolysis and quality of lucerne silage was investigated. The experiment was set as 2x3 factorial with three replications per each treatment. Based on the results of chemical analysis, there was no significant variation within the contents of basic nutrients (p>0.05), while some variation was observed in lipid and carbohydrate contents. In silages with higher dry matter content the reduction of fermentation was observed, with acetate as dominant product in acid contents in A2B1 treatment, and also reduction in proteolytic processes which shows as lower ammonia and soluble nitrogen content (p lt 0.05). With the increase of level of compaction the increase in lactic acid was observed, with decrease in ammonia and soluble nitrogen (p lt 0.05). In material with natural moisture content, regardless of the level of compaction, the butyric fermentation was observed and intensified aminogenesis. On the basis of this investigation it can be concluded that wilting and adequate compaction are the key physical factors which influence silage quality parameters., U radu je ispitivan uticaj provenjavanja, odnosno dva stepena sadržaja suve materije (SM = 250 i 360 gkg-1) i tri stepena sabijenosti (460, 550 i 620 gdm-3) na promene parametara hemijskog sastava, proteolize i kvaliteta silaže lucerke. Eksperiment je postavljen po statističkom modelu 2x3 u tri ponavljanja po svakom tretmanu. Na osnovu rezultata laboratorijskih analiza, utvrđeno je nesignifikantno variranje u sadržaju pojedinih hranljivih materija (p>0,05), izuzev masti i ugljenih hidrata. U silažama sa većim stepenom suve materije utvrđena je redukcija fermentacije, sa dominacijom sirćetne u ukupnom sadržaju kiselina u tretmanu A2B1, kao i redukcija proteolitičkih procesa, odnosno manji sadržaj amonijaka i rastvorljivog zota (p lt 0,05). Sa povećanjem stepena sabijenosti došlo je do porasta apsolutnog udela mlečne kiseline i smanjenja udela amonijačnog i rastvorljivog azota (p lt 0,05). U materijalu sa prirodnim sadržajem vlage, bez obzira na stepen sabijanja, došlo je do buterne fermentacije i intenziviranja aminogeneze. Na osnovu izvedenih ispitivanja može se zaključiti da su provenjavanje i adekvatno sabijanje ključni fizički faktori za parametre kvaliteta silaže lucerke.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage, Uticaj provenjavanja i stepena sabijenosti na parametre hemijskog sastava, proteolize i kvaliteta silaže lucerke",
pages = "46-39",
number = "3-4",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3383"
}

Djordjević, N., Grubić, G., Stojanović, B., Radivojević, M.,& Božičković, A.. (2013). The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 19(3-4), 39-46.
https://hdl.handle.net/21.15107/rcub_agrospace_3383

Djordjević N, Grubić G, Stojanović B, Radivojević M, Božičković A. The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2013;19(3-4):39-46.
https://hdl.handle.net/21.15107/rcub_agrospace_3383 .

Djordjević, Nenad, Grubić, Goran, Stojanović, Bojan, Radivojević, Mihailo, Božičković, Aleksa, "The influence of wilting and compaction degree on parameters of chemical composition, proteolysis and quality of lucerne silage" in Zbornik naučnih radova Instituta PKB Agroekonomik, 19, no. 3-4 (2013):39-46,
https://hdl.handle.net/21.15107/rcub_agrospace_3383 .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3382
AB  - The most intensive body development of heifers occurs in period before reaching puberty when the intensity of increasing of withers height and hip height is three time higher then after puberty. Heifers with higher body weight gains until reaching the puberty are younger at calving, characterized with higher mammary mass, with greater mammary fat deposition, with no significant difference in the mass of mammary parenchyma and milk yield in the first lactation. Increasing the ration concentration of high quality protein that is available in the small intestine (RUP - rumen undegradable fraction of CP) has a positive effect on the growth rate of heifers (withers height, BW) with no negative impact on the mammary development. Female calves up to weaning that consume diet with high energy and protein concentration and higher daily gains, are characterized with larger mass of mammary parenchyma, increased mammary fat content and increased BW at calving and milk yield in the first lactation. Optimal growth rate for heifers during the rearing depends on genetic potential for growth and body size of mature animals.
AB  - Najintenzivniji telesni razvoj junica odvija se u periodu pre dostizanja puberteta kada je intenzitet povećanja visine grebena i krsta tri puta veći nego posle puberteta. Junice koje u fazi odgoja do dostizanja puberteta, ostvaruju veće dnevne priraste. tele se u ranijem uzrastu, odlikuju se većom ukupnom masom vimena, većom masom deponovanog masnog tkiva u vimenu, bez značajne razlike u masi mamarnog parenhima, i mlečnosti u prvoj laktaciji. Povećanje sadržaja u obroku, proteina visoke biološke vrednosti, dostupnog u tankom crevu (RUP - frakcija SP nerazgradivog u rumenu) pozitivno utiče na povećanje intenziteta porasta kod junica (visina grebena, TM) bez negativnog uticaja na razvoj mlečne žlezde. Ženska telad koja u periodu do odlučenja konzumiraju obrok sa većim sadržajem energije i proteina, i ostvaruju veće priraste, odlikuju se većim vrednostima za masu parenhima mlečne žlezde, većim sadržajem masti u vimenu, ali i većom TM pri teljenju, i većom mlečnošću u prvoj laktaciji. Optimalan intenzitet porasta junica tokom perioda odgoja zavisi od genetskog potencijala za porast i telesnih dimenzija odraslih životinja.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Efficient nutrition of prepubertal dairy heifers
T1  - Efikasna ishrana mlečnih junica u predpubertetnom periodu
EP  - 38
IS  - 3-4
SP  - 25
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3382
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2013",
abstract = "The most intensive body development of heifers occurs in period before reaching puberty when the intensity of increasing of withers height and hip height is three time higher then after puberty. Heifers with higher body weight gains until reaching the puberty are younger at calving, characterized with higher mammary mass, with greater mammary fat deposition, with no significant difference in the mass of mammary parenchyma and milk yield in the first lactation. Increasing the ration concentration of high quality protein that is available in the small intestine (RUP - rumen undegradable fraction of CP) has a positive effect on the growth rate of heifers (withers height, BW) with no negative impact on the mammary development. Female calves up to weaning that consume diet with high energy and protein concentration and higher daily gains, are characterized with larger mass of mammary parenchyma, increased mammary fat content and increased BW at calving and milk yield in the first lactation. Optimal growth rate for heifers during the rearing depends on genetic potential for growth and body size of mature animals., Najintenzivniji telesni razvoj junica odvija se u periodu pre dostizanja puberteta kada je intenzitet povećanja visine grebena i krsta tri puta veći nego posle puberteta. Junice koje u fazi odgoja do dostizanja puberteta, ostvaruju veće dnevne priraste. tele se u ranijem uzrastu, odlikuju se većom ukupnom masom vimena, većom masom deponovanog masnog tkiva u vimenu, bez značajne razlike u masi mamarnog parenhima, i mlečnosti u prvoj laktaciji. Povećanje sadržaja u obroku, proteina visoke biološke vrednosti, dostupnog u tankom crevu (RUP - frakcija SP nerazgradivog u rumenu) pozitivno utiče na povećanje intenziteta porasta kod junica (visina grebena, TM) bez negativnog uticaja na razvoj mlečne žlezde. Ženska telad koja u periodu do odlučenja konzumiraju obrok sa većim sadržajem energije i proteina, i ostvaruju veće priraste, odlikuju se većim vrednostima za masu parenhima mlečne žlezde, većim sadržajem masti u vimenu, ali i većom TM pri teljenju, i većom mlečnošću u prvoj laktaciji. Optimalan intenzitet porasta junica tokom perioda odgoja zavisi od genetskog potencijala za porast i telesnih dimenzija odraslih životinja.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Efficient nutrition of prepubertal dairy heifers, Efikasna ishrana mlečnih junica u predpubertetnom periodu",
pages = "38-25",
number = "3-4",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3382"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2013). Efficient nutrition of prepubertal dairy heifers. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 19(3-4), 25-38.
https://hdl.handle.net/21.15107/rcub_agrospace_3382

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Efficient nutrition of prepubertal dairy heifers. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2013;19(3-4):25-38.
https://hdl.handle.net/21.15107/rcub_agrospace_3382 .

Stojanović, Bojan, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, Aleksandra, "Efficient nutrition of prepubertal dairy heifers" in Zbornik naučnih radova Instituta PKB Agroekonomik, 19, no. 3-4 (2013):25-38,
https://hdl.handle.net/21.15107/rcub_agrospace_3382 .

TY  - JOUR
AU  - Božičković, Aleksa
AU  - Grubić, Goran
AU  - Verbić, J.
AU  - Znidarsić, T.
AU  - Djordjević, N.
AU  - Stojanović, Bojan
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3295
AB  - The aim of the current work was to investigate the possibility of modifying the existing mean stage by weight (MSW) system for evaluating the average development stage in alfalfa. The modification was performed with the aim of providing a simplified system that may be used to evaluate the alfalfa development stage and to predict its nutritive value for ruminants. The suggested modification consists of designating an MSW value on the basis of the fresh weight of all morphological stages in a fresh green plant, as opposed to the original method which is based on weighing all morphological stages dried at 65 degrees C. The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. On all collected samples the following characteristics were determined: MSW, modified MSW (mean stage by fresh weight (MSFW)), crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), crude ash (CA) and in vitro organic matter digestibility (IVOMD). For these characteristics of chemical composition (apart from CA) and nutritive value the regressions were calculated for their prediction based on MSW and MSFW. The regressions were derived for individual growth cycles and all cycles combined. A trend for an increase in the coefficient of determination (R-2) was identified as well as a decrease in root-mean-square error (RMSE) for all equations derived for all investigated characteristics from the spring growth to the second regrowth. A deviation from this trend was observed only in equations derived for IVOMD. A very high correlation was observed between MSW and MSFW (r=0.999). The determined R-2 and RMSE were very similar within the same growth cycle in all regressions for prediction of chemical composition and nutritive value derived for MSW and MSFW. Based on the results of this investigation the MSFW appears to be a quick and accurate method for determining the average development stage in alfalfa which can therefore be recommended for both scientific research and practical field use, as well as for prediction of its chemical composition and nutritive value.
PB  - Cambridge Univ Press, New York
T2  - Journal of Agricultural Science
T1  - A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value
EP  - 598
IS  - 4
SP  - 590
VL  - 151
DO  - 10.1017/S0021859613000129
ER  - 

@article{
author = "Božičković, Aleksa and Grubić, Goran and Verbić, J. and Znidarsić, T. and Djordjević, N. and Stojanović, Bojan",
year = "2013",
abstract = "The aim of the current work was to investigate the possibility of modifying the existing mean stage by weight (MSW) system for evaluating the average development stage in alfalfa. The modification was performed with the aim of providing a simplified system that may be used to evaluate the alfalfa development stage and to predict its nutritive value for ruminants. The suggested modification consists of designating an MSW value on the basis of the fresh weight of all morphological stages in a fresh green plant, as opposed to the original method which is based on weighing all morphological stages dried at 65 degrees C. The investigation was done on 141 samples of one alfalfa cultivar, collected from the same location during the first three growth cycles: spring growth, the first and the second regrowth. On all collected samples the following characteristics were determined: MSW, modified MSW (mean stage by fresh weight (MSFW)), crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), crude ash (CA) and in vitro organic matter digestibility (IVOMD). For these characteristics of chemical composition (apart from CA) and nutritive value the regressions were calculated for their prediction based on MSW and MSFW. The regressions were derived for individual growth cycles and all cycles combined. A trend for an increase in the coefficient of determination (R-2) was identified as well as a decrease in root-mean-square error (RMSE) for all equations derived for all investigated characteristics from the spring growth to the second regrowth. A deviation from this trend was observed only in equations derived for IVOMD. A very high correlation was observed between MSW and MSFW (r=0.999). The determined R-2 and RMSE were very similar within the same growth cycle in all regressions for prediction of chemical composition and nutritive value derived for MSW and MSFW. Based on the results of this investigation the MSFW appears to be a quick and accurate method for determining the average development stage in alfalfa which can therefore be recommended for both scientific research and practical field use, as well as for prediction of its chemical composition and nutritive value.",
publisher = "Cambridge Univ Press, New York",
journal = "Journal of Agricultural Science",
title = "A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value",
pages = "598-590",
number = "4",
volume = "151",
doi = "10.1017/S0021859613000129"
}

Božičković, A., Grubić, G., Verbić, J., Znidarsić, T., Djordjević, N.,& Stojanović, B.. (2013). A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value. in Journal of Agricultural Science
Cambridge Univ Press, New York., 151(4), 590-598.
https://doi.org/10.1017/S0021859613000129

Božičković A, Grubić G, Verbić J, Znidarsić T, Djordjević N, Stojanović B. A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value. in Journal of Agricultural Science. 2013;151(4):590-598.
doi:10.1017/S0021859613000129 .

Božičković, Aleksa, Grubić, Goran, Verbić, J., Znidarsić, T., Djordjević, N., Stojanović, Bojan, "A modified method for assessment of the morphological stage of development as a predictor of alfalfa herbage chemical composition and nutritive value" in Journal of Agricultural Science, 151, no. 4 (2013):590-598,
https://doi.org/10.1017/S0021859613000129 . .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Dinić, Bora
AU  - Stojanović, Bojan
AU  - Radivojević, Mihailo
AU  - Božičković, Aleksa
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3077
AB  - Different phases of plant development (beginning of bloom - 10% flowers, midbloom - 50% flowers), two growth cycles (II and IV cut) and two levels of biomass wilting (DM = 320 gkg-1 and 410 gkg-1) on changes in chemical composition, proteolysis and quality of lucerne silage were investigated in this experiment. Experiment was set as statistical model 2×2×2 (2k). Based on the results of chemical analysis it is confirmed that in earlier cut lucerne silages there was more crude protein, ammonia and soluble nitrogen , and less crude fiber (p lt 0.05). Lucerne silages from IV cut were very little different from silages from II cut in nutrient content and quality parameters. Wilting lucerne to the highest level of dry matter reduced total fermentation and proteolysis (p lt 0.05). At the same time there were no significant differences in chemical composition of silages (p>0.05), unless protein. On the basis of this investigations it can be concluded that ensiling of lucerne in latter phases of plant development, with higher degree of wilting, produces silages with better quality parameters, but also with significantly lower nutritive value. Therefore the use of various methods of induction and stimulation of lactic acid fermentation is recommended for lucerne mass cut in earlier development phases - with the aim to obtain maximum nutrients and best quality.
AB  - U radu je ispitivan uticaj različitih faza razvića (početak cvetanja - 10% iscvetalosti, sredina cvetanja - 50% iscvetalosti), dva ciklusa korišćenja (II i IV otkos) i dva stepena provenulosti biomase, odnosno sadržaja suve materije (SM = 320 g/kg i 410 g/ kg) na promene parametara hemijskog sastava, proteolize i kvaliteta silaže lucerke. Eksperiment je postavljen po statističkom modelu 2×2×2 (2k). Na osnovu rezultata hemijskih analiza utvrđeno je u silažama ranije košene lucerke veći sadržaj proteina, amonijaka i rastvorljivog zota i manji sadržaj sirove celuloze (p lt 0,05). Silaže lucerke iz IV otkosa su se minimalno razlikovale u pogledu sadržaja hranljivih materija i parametara kvaliteta u odnosu na silaže lucerke iz II otkosa. Provenjavanje lucerke do većeg nivoa suve materije je dovelo do redukcije fermentacije i proteolize (p lt 0,05). Pri tome nije bilo statistički značajnih razlika u pogledu hemijskog sastava silaža (p>0,05), izuzev proteina. Na osnovu izvedenih ispitivanja može se zaključiti da se siliranjem lucerke iz kasnijih faza razvića, uz veći stepen provenjavanja, postiže bolji kvalitet silaža, ali se signifikantno smanjuje hranljiva vrednost. Zbog toga se preporučuje primena različitih metoda indukcije i stimulacije mlečnokiselinskog vrenja za materijal košen u ranijim fenofazama, kako bi se dobila maksimalna hranljiva vrednost i maksimalan kvalitet.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - The influence of development phase, cut and degree of wilting on parameters of chemical composition, proteolysis and quality in lucerne silage
T1  - Uticaj fenofaze, otkosa i stepena provenulosti na parametre hemijskog sastava, proteolize i kvaliteta silaže lucerke
EP  - 47
IS  - 3-4
SP  - 41
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3077
ER  - 

@article{
author = "Djordjević, Nenad and Grubić, Goran and Dinić, Bora and Stojanović, Bojan and Radivojević, Mihailo and Božičković, Aleksa",
year = "2012",
abstract = "Different phases of plant development (beginning of bloom - 10% flowers, midbloom - 50% flowers), two growth cycles (II and IV cut) and two levels of biomass wilting (DM = 320 gkg-1 and 410 gkg-1) on changes in chemical composition, proteolysis and quality of lucerne silage were investigated in this experiment. Experiment was set as statistical model 2×2×2 (2k). Based on the results of chemical analysis it is confirmed that in earlier cut lucerne silages there was more crude protein, ammonia and soluble nitrogen , and less crude fiber (p lt 0.05). Lucerne silages from IV cut were very little different from silages from II cut in nutrient content and quality parameters. Wilting lucerne to the highest level of dry matter reduced total fermentation and proteolysis (p lt 0.05). At the same time there were no significant differences in chemical composition of silages (p>0.05), unless protein. On the basis of this investigations it can be concluded that ensiling of lucerne in latter phases of plant development, with higher degree of wilting, produces silages with better quality parameters, but also with significantly lower nutritive value. Therefore the use of various methods of induction and stimulation of lactic acid fermentation is recommended for lucerne mass cut in earlier development phases - with the aim to obtain maximum nutrients and best quality., U radu je ispitivan uticaj različitih faza razvića (početak cvetanja - 10% iscvetalosti, sredina cvetanja - 50% iscvetalosti), dva ciklusa korišćenja (II i IV otkos) i dva stepena provenulosti biomase, odnosno sadržaja suve materije (SM = 320 g/kg i 410 g/ kg) na promene parametara hemijskog sastava, proteolize i kvaliteta silaže lucerke. Eksperiment je postavljen po statističkom modelu 2×2×2 (2k). Na osnovu rezultata hemijskih analiza utvrđeno je u silažama ranije košene lucerke veći sadržaj proteina, amonijaka i rastvorljivog zota i manji sadržaj sirove celuloze (p lt 0,05). Silaže lucerke iz IV otkosa su se minimalno razlikovale u pogledu sadržaja hranljivih materija i parametara kvaliteta u odnosu na silaže lucerke iz II otkosa. Provenjavanje lucerke do većeg nivoa suve materije je dovelo do redukcije fermentacije i proteolize (p lt 0,05). Pri tome nije bilo statistički značajnih razlika u pogledu hemijskog sastava silaža (p>0,05), izuzev proteina. Na osnovu izvedenih ispitivanja može se zaključiti da se siliranjem lucerke iz kasnijih faza razvića, uz veći stepen provenjavanja, postiže bolji kvalitet silaža, ali se signifikantno smanjuje hranljiva vrednost. Zbog toga se preporučuje primena različitih metoda indukcije i stimulacije mlečnokiselinskog vrenja za materijal košen u ranijim fenofazama, kako bi se dobila maksimalna hranljiva vrednost i maksimalan kvalitet.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "The influence of development phase, cut and degree of wilting on parameters of chemical composition, proteolysis and quality in lucerne silage, Uticaj fenofaze, otkosa i stepena provenulosti na parametre hemijskog sastava, proteolize i kvaliteta silaže lucerke",
pages = "47-41",
number = "3-4",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3077"
}

Djordjević, N., Grubić, G., Dinić, B., Stojanović, B., Radivojević, M.,& Božičković, A.. (2012). The influence of development phase, cut and degree of wilting on parameters of chemical composition, proteolysis and quality in lucerne silage. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 18(3-4), 41-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3077

Djordjević N, Grubić G, Dinić B, Stojanović B, Radivojević M, Božičković A. The influence of development phase, cut and degree of wilting on parameters of chemical composition, proteolysis and quality in lucerne silage. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2012;18(3-4):41-47.
https://hdl.handle.net/21.15107/rcub_agrospace_3077 .

Djordjević, Nenad, Grubić, Goran, Dinić, Bora, Stojanović, Bojan, Radivojević, Mihailo, Božičković, Aleksa, "The influence of development phase, cut and degree of wilting on parameters of chemical composition, proteolysis and quality in lucerne silage" in Zbornik naučnih radova Instituta PKB Agroekonomik, 18, no. 3-4 (2012):41-47,
https://hdl.handle.net/21.15107/rcub_agrospace_3077 .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, N.
AU  - Glamočić, Dragan M.
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3036
AB  - The study was conducted to investigate the effects of a total mixed ration (TMR) particle size on digestibility and production performances of the high-yielding cows in early lactation. The treatments were TMRs with forage-to-concentrate ratio 43:57 in diet dry matter, with four different mean particle lengths and physically effective fiber (PENDF) content based on different cut length of corn silage and alfalfa haylage. Determined values of PEF (physical effectiveness factor) and PENDF (through original and modified Penn State Particle Separator, PSPS) were considerably higher for forages and TMRs using the modified PSPS. The cut length of forage and particle size of TMRs did not affect dry matter intake. However reduced forage cut length significantly increased the apparent total tract digestibility of NDF (from 53.9 to 58.66%), and crude protein (from 71.56 to 77.90%), with the decrease in the non-fiber carbohydrate digestibility (from 91.99 to 86.80%). The increase in the milk yield (35.62 vs. 38.36 kg), and decrease in the milk fat (3.50 vs. 3.10%) and protein content (3.11 vs. 2.99%) were observed with the reduction of particle size in forages. There was no effect on milk fat daily yield, but the increase of the milk protein yield (1.08 vs. 1.15 kg) was determined with the reduced forage cut lengths. The milk fat to protein ratio had tendency to decrease with the reduced forage cut length. Decrease in forage particle size improved feed conversion ratio for milk production, improved digestibility and the milk yield, whereas milk protein content was reduced.
PB  - Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid
T2  - Spanish Journal of Agricultural Research
T1  - Effects of different levels of physically effective fibers in diets for cows in early lactation
EP  - 107
IS  - 1
SP  - 99
VL  - 10
DO  - 10.5424/sjar/2012101-159-11
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, N. and Glamočić, Dragan M. and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2012",
abstract = "The study was conducted to investigate the effects of a total mixed ration (TMR) particle size on digestibility and production performances of the high-yielding cows in early lactation. The treatments were TMRs with forage-to-concentrate ratio 43:57 in diet dry matter, with four different mean particle lengths and physically effective fiber (PENDF) content based on different cut length of corn silage and alfalfa haylage. Determined values of PEF (physical effectiveness factor) and PENDF (through original and modified Penn State Particle Separator, PSPS) were considerably higher for forages and TMRs using the modified PSPS. The cut length of forage and particle size of TMRs did not affect dry matter intake. However reduced forage cut length significantly increased the apparent total tract digestibility of NDF (from 53.9 to 58.66%), and crude protein (from 71.56 to 77.90%), with the decrease in the non-fiber carbohydrate digestibility (from 91.99 to 86.80%). The increase in the milk yield (35.62 vs. 38.36 kg), and decrease in the milk fat (3.50 vs. 3.10%) and protein content (3.11 vs. 2.99%) were observed with the reduction of particle size in forages. There was no effect on milk fat daily yield, but the increase of the milk protein yield (1.08 vs. 1.15 kg) was determined with the reduced forage cut lengths. The milk fat to protein ratio had tendency to decrease with the reduced forage cut length. Decrease in forage particle size improved feed conversion ratio for milk production, improved digestibility and the milk yield, whereas milk protein content was reduced.",
publisher = "Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid",
journal = "Spanish Journal of Agricultural Research",
title = "Effects of different levels of physically effective fibers in diets for cows in early lactation",
pages = "107-99",
number = "1",
volume = "10",
doi = "10.5424/sjar/2012101-159-11"
}

Stojanović, B., Grubić, G., Djordjević, N., Glamočić, D. M., Božičković, A.,& Ivetić, A.. (2012). Effects of different levels of physically effective fibers in diets for cows in early lactation. in Spanish Journal of Agricultural Research
Spanish Natl Inst Agricultural & Food Research & Technolo, Madrid., 10(1), 99-107.
https://doi.org/10.5424/sjar/2012101-159-11

Stojanović B, Grubić G, Djordjević N, Glamočić DM, Božičković A, Ivetić A. Effects of different levels of physically effective fibers in diets for cows in early lactation. in Spanish Journal of Agricultural Research. 2012;10(1):99-107.
doi:10.5424/sjar/2012101-159-11 .

Stojanović, Bojan, Grubić, Goran, Djordjević, N., Glamočić, Dragan M., Božičković, Aleksa, Ivetić, Aleksandra, "Effects of different levels of physically effective fibers in diets for cows in early lactation" in Spanish Journal of Agricultural Research, 10, no. 1 (2012):99-107,
https://doi.org/10.5424/sjar/2012101-159-11 . .

TY  - CONF
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Dinić, Bora
AU  - Božičković, Aleksa
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2783
AB  - An overview of current trends in lucerne use in animal nutrition in different forms: fresh lucerne, preserved lucerne - hay and haylage, or a component of mixtures as dehydrated lucerne and protein-carotenoide concentrate of lucerne juice are presented in paper. The nutritive value of lucerne is directly affected by the stage of maturity, method of preservation, processing and utilization in animal diets. Based on morphological changes the chemical composition of alfalfa plants can be estimated with high correlations (above 90%). Due to numerous factors that affect on chemical composition of lucerne hay, the nutritive value is highly variable, and using of lucerne hay in rations for ruminants is minimal, according to requirements for optimal digestion and ruminal function. The cut length of lucerne haylage affects average particle length of total mixed rations for ruminants. The physical form and effectiveness of ration is significant parameter for regular rumen function, digestibility of nutrients, and production performances of ruminants, particularly highyielding lactating cows. The largest reasons for difficulties in preserving lucerne as haylage are in its high buffer capacity, the insufficient content of fermentable sugars and fast degradation of nitrogen compounds. The most favorable results were obtained with simultaneous use of carbohydrate supplements with homofermentative lactic bacteria for wilted plant material. In spite of relatively high content of crude fiber, lucerne may be significant for nonruminant nutrition after specific treatment and processing, particularly for hen feeding with the purpose of yolk color modification. Lucerne juice may be particularly important for this purpose because it is a proteincarotenoide concentrate. It can be concluded that lucerne still remains one of the main feedstuffs due to its high nutrition value and exceptional biological characteristics.
PB  - 6th Central European Congress on Food, CEFood 2012
C3  - CEFood 2012 - Proceedings of 6th Central European Congress on Food
T1  - Contemporary aspects of lucerne use in animal nutrition
EP  - 1519
SP  - 1514
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2783
ER  - 

@conference{
author = "Djordjević, Nenad and Grubić, Goran and Stojanović, Bojan and Dinić, Bora and Božičković, Aleksa",
year = "2012",
abstract = "An overview of current trends in lucerne use in animal nutrition in different forms: fresh lucerne, preserved lucerne - hay and haylage, or a component of mixtures as dehydrated lucerne and protein-carotenoide concentrate of lucerne juice are presented in paper. The nutritive value of lucerne is directly affected by the stage of maturity, method of preservation, processing and utilization in animal diets. Based on morphological changes the chemical composition of alfalfa plants can be estimated with high correlations (above 90%). Due to numerous factors that affect on chemical composition of lucerne hay, the nutritive value is highly variable, and using of lucerne hay in rations for ruminants is minimal, according to requirements for optimal digestion and ruminal function. The cut length of lucerne haylage affects average particle length of total mixed rations for ruminants. The physical form and effectiveness of ration is significant parameter for regular rumen function, digestibility of nutrients, and production performances of ruminants, particularly highyielding lactating cows. The largest reasons for difficulties in preserving lucerne as haylage are in its high buffer capacity, the insufficient content of fermentable sugars and fast degradation of nitrogen compounds. The most favorable results were obtained with simultaneous use of carbohydrate supplements with homofermentative lactic bacteria for wilted plant material. In spite of relatively high content of crude fiber, lucerne may be significant for nonruminant nutrition after specific treatment and processing, particularly for hen feeding with the purpose of yolk color modification. Lucerne juice may be particularly important for this purpose because it is a proteincarotenoide concentrate. It can be concluded that lucerne still remains one of the main feedstuffs due to its high nutrition value and exceptional biological characteristics.",
publisher = "6th Central European Congress on Food, CEFood 2012",
journal = "CEFood 2012 - Proceedings of 6th Central European Congress on Food",
title = "Contemporary aspects of lucerne use in animal nutrition",
pages = "1519-1514",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2783"
}

Djordjević, N., Grubić, G., Stojanović, B., Dinić, B.,& Božičković, A.. (2012). Contemporary aspects of lucerne use in animal nutrition. in CEFood 2012 - Proceedings of 6th Central European Congress on Food
6th Central European Congress on Food, CEFood 2012., 1514-1519.
https://hdl.handle.net/21.15107/rcub_agrospace_2783

Djordjević N, Grubić G, Stojanović B, Dinić B, Božičković A. Contemporary aspects of lucerne use in animal nutrition. in CEFood 2012 - Proceedings of 6th Central European Congress on Food. 2012;:1514-1519.
https://hdl.handle.net/21.15107/rcub_agrospace_2783 .

Djordjević, Nenad, Grubić, Goran, Stojanović, Bojan, Dinić, Bora, Božičković, Aleksa, "Contemporary aspects of lucerne use in animal nutrition" in CEFood 2012 - Proceedings of 6th Central European Congress on Food (2012):1514-1519,
https://hdl.handle.net/21.15107/rcub_agrospace_2783 .

TY  - CONF
AU  - Božičković, Aleksa
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Stojanović, Bojan
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2782
AB  - Investigation was performed to observe the changes of crude protein (CP) content in lucerne plant during the first three vegetation cycles within one vegetation season, with the aim to optimize the lucerne utilization in ruminant nutrition. A total of 143 samples were collected from 7 April 2010 (the start of the spring vegetation) to 9 August 2010 (the end of the third vegetation cycle). The sampling was done by cutting a randomly chosen area of 0.1 m2. Crude protein (CP, expressed in dry matter) was analyzed in all samples with standard Kjeldahl procedure. Samples were collected in all stages of the three vegetation cycles, from the early vegetation to the ripe pod phase. There were large differences in plant protein content changes during different vegetation cycles. During the first vegetation cycle, which had the highest yield of plant green mass, there was a sudden drop in the protein content that was coinciding with optimal cutting moment. In absolute values, this drop was more than 8 percent points of CP during the 10-day period. Second and third vegetation cycles had slower and more uniform decreases in CP content during vegetation. Postponing the cutting moment in order to obtain higher yield, during the first vegetation cycle may lead to radical decrease of the nutritive value in lucerne. Adequate and rapid evaluation of the right moment for lucerne cutting is very important in order to obtain quality forage rich in protein.
PB  - 6th Central European Congress on Food, CEFood 2012
C3  - CEFood 2012 - Proceedings of 6th Central European Congress on Food
T1  - Changes of crude protein content in lucerne plant during the first three vegetation cycles
EP  - 1513
SP  - 1509
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2782
ER  - 

@conference{
author = "Božičković, Aleksa and Grubić, Goran and Djordjević, Nenad and Stojanović, Bojan",
year = "2012",
abstract = "Investigation was performed to observe the changes of crude protein (CP) content in lucerne plant during the first three vegetation cycles within one vegetation season, with the aim to optimize the lucerne utilization in ruminant nutrition. A total of 143 samples were collected from 7 April 2010 (the start of the spring vegetation) to 9 August 2010 (the end of the third vegetation cycle). The sampling was done by cutting a randomly chosen area of 0.1 m2. Crude protein (CP, expressed in dry matter) was analyzed in all samples with standard Kjeldahl procedure. Samples were collected in all stages of the three vegetation cycles, from the early vegetation to the ripe pod phase. There were large differences in plant protein content changes during different vegetation cycles. During the first vegetation cycle, which had the highest yield of plant green mass, there was a sudden drop in the protein content that was coinciding with optimal cutting moment. In absolute values, this drop was more than 8 percent points of CP during the 10-day period. Second and third vegetation cycles had slower and more uniform decreases in CP content during vegetation. Postponing the cutting moment in order to obtain higher yield, during the first vegetation cycle may lead to radical decrease of the nutritive value in lucerne. Adequate and rapid evaluation of the right moment for lucerne cutting is very important in order to obtain quality forage rich in protein.",
publisher = "6th Central European Congress on Food, CEFood 2012",
journal = "CEFood 2012 - Proceedings of 6th Central European Congress on Food",
title = "Changes of crude protein content in lucerne plant during the first three vegetation cycles",
pages = "1513-1509",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2782"
}

Božičković, A., Grubić, G., Djordjević, N.,& Stojanović, B.. (2012). Changes of crude protein content in lucerne plant during the first three vegetation cycles. in CEFood 2012 - Proceedings of 6th Central European Congress on Food
6th Central European Congress on Food, CEFood 2012., 1509-1513.
https://hdl.handle.net/21.15107/rcub_agrospace_2782

Božičković A, Grubić G, Djordjević N, Stojanović B. Changes of crude protein content in lucerne plant during the first three vegetation cycles. in CEFood 2012 - Proceedings of 6th Central European Congress on Food. 2012;:1509-1513.
https://hdl.handle.net/21.15107/rcub_agrospace_2782 .

Božičković, Aleksa, Grubić, Goran, Djordjević, Nenad, Stojanović, Bojan, "Changes of crude protein content in lucerne plant during the first three vegetation cycles" in CEFood 2012 - Proceedings of 6th Central European Congress on Food (2012):1509-1513,
https://hdl.handle.net/21.15107/rcub_agrospace_2782 .

TY  - CONF
AU  - Dinić, Bora
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5514
AB  - U radu je prikazan značaj ribljeg brašna kao i drugih hraniva životinjskog porekla za proizvodnju smeša koncentrata, kao i mogućnost njihove suspstitucije hranivima biljnog porekla u kombinaciji sa sintetičkim aminokiselinama, ili komercijalnim „zamenama“ ribljeg brašna. 
Riblje brašno je do sada najviše korišćeno hranivo životinjslog porekla. Zbog opasnosti od širenja bolesti Bovine spongiform encephalopathy – BSE, u Evropskoj uniji je regulativama 999/2001 i 1234/2003 zabranjena upotreba obrađenih animalnih proteina, u koje spadaju različite vrste mesno-koštanog brašna, za sve farmske životinje koje ulaze u lanac ishrane ljudi, izuzev ribljeg brašna za nepreživare. Kod nas je u skladu sa Zakonom o veterinarstvu iz 2005. uvedena obaveza za sve fabrike hrane za životinje da odvajaju linije u kojima se pripremaju koncentrati za preživare, ili da proizvodnju obavljaju na istoj liniji ali da se pri tome odreknu upotrebe hraniva životinjskog porekla. U skladu sa tim, vrši se stalni monitoring smeša za preživare. 
Zadnjih godina je korišćenje ribljeg brašna u ishrani nepreživara jako smanjeno zbog navedenih zakonskih ograničenja, sve lošije hranljive i upotrebne vrednosti (zdravstvene ispravnosti), problema falsifikovanja (dodavanja hraniva niže hranljive vrednosti: sojine sačme, kukuruznog glutena, brašna od perja pa čak i uree) kao i zbog visoke cene. Osim toga, dobro je poznato da riblje brašno prenosi svoj specifičan miris na proizvode pa se obavezno isključuje iz smeša pri kraju tova brojlera.
Velike količine ribljeg brašna se i danas koriste pri proizvodnji peletirane hrane za pastrmke i druge karnivore ribe. Naime, ove vrste riba zahtevaju visok nivo proteina dobre biološke vrednosti u obrocima. Ranih 90-ih godina preporučivan odnos svarljivih sirovih proteina i svarljive energije u obrocima za pastrmke je bio 22-25 g/MJ. Nasuprot tome, u zadnjoj dekadi eksperimentalno je dokazana efikasnost obroka sa većim sadržajem masti (>20%) i kada je odnos proteina i energije uži. Međutim, u tom slučaju treba obezbediti odgovarajući nivo esencijalnih aminokiselina. Objašnjenje je u specifičnom metabolizmu riba. Krajnji proizvod metabolizma proteina u riba je amonijak, za šta je potrebno manje energije. Nasuprot tome, krajnji proizvod metabolizma energije u svinja je urea, čime se objašnjava uži odnos proteina i energije (oko 14 g/KJ).
Zbog svega navedenog proizvođači teže da riblje brašno zamene (delimično ili potpuno) nekim drugim proteinskim hranivom (biljnog ili životinjskog porekla), pri čemu je jedan od glavnih ciljeva što niža cena proizvodnje. Do sada je najviše pažnje poklanjano proizvodima od soje, odnosno sojinoj sačmi. Ovo hranivo ima veliku biološku vrednost proteina ali i visok sadržaj različitih antinutritivnih materija. Nasuprot tome, efikasnijim se pokazao koncentrat proteina soje. To je hranivo koje se dobija uklanjanjem masti i rastvorljivih ugljenih hidrata. Eksperimentalno je utvrđena mogućnost delimične supstitucije ribljeg brašna suncokretovom sačmom, ali je glavni nedostatak ovog hraniva u velikoj količini nerastvorljivh ugljenih hidrata. Pored ovih hraniva, u eksperimentima su ispitivane sačme pamuka, kikirikija, uljane repice, brašno lupine, kukuruzni gluten, proteini krompira i dr. Međutim, nedostatak svih ovih hraniva je nizak nivo nekih esencijalnih aminokiselina kao i prisustvo antinutritivnih, štetnih i nesvarljivih materija. Jedno od potencijalnih proteinskih hraniva za ribe i domaće životinje je bakterijski protein. U pogledu brzine rasta i produkcije proteina, bakterije imaju prednost u odnosu na kvasce. Pored toga, bakterije sadrže i više proteina (do 80%), a aminokiselinski sastav je povoljniji i sličniji  proteinima životinjskog porekla. Nedostatak je velika količina nukleinskih kiselina (do 18%) koje u sisara katabolišu do mokraćne kiseline.
U zaključku se ističe da su troškovi ishrane ključni za rentabilnost proizvodnje u stočarstvu i nekim oblicima ribarske proizvodnje. Supstitucija ribljeg brašna u obrocima za domaće životinje i ribe je neophodnost zbog visoke cene ovog hraniva, varijabilnog kvaliteta i eventualnog falsifikovanja jeftinijim hranivima. Za sada, najveći značaj pokazuju proizvodi prerade soje a određenu perspektivu imaju i bakterijski proteini.
C3  - 5. International Conference “Aquaculture & Fishery” Faculty of Agriculture, Belgrade-Zemun, Serbia,
T1  - Importance Of Fish Meal And Other Animal Feedstuffs In Production Of Concentrate Mixtures
T1  - Značaj ribljeg brašna i drugih hraniva životinjskog porekla za proizvodnju smeša koncentrata
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5514
ER  - 

@conference{
author = "Dinić, Bora and Djordjević, Nenad and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa",
year = "2011",
abstract = "U radu je prikazan značaj ribljeg brašna kao i drugih hraniva životinjskog porekla za proizvodnju smeša koncentrata, kao i mogućnost njihove suspstitucije hranivima biljnog porekla u kombinaciji sa sintetičkim aminokiselinama, ili komercijalnim „zamenama“ ribljeg brašna. 
Riblje brašno je do sada najviše korišćeno hranivo životinjslog porekla. Zbog opasnosti od širenja bolesti Bovine spongiform encephalopathy – BSE, u Evropskoj uniji je regulativama 999/2001 i 1234/2003 zabranjena upotreba obrađenih animalnih proteina, u koje spadaju različite vrste mesno-koštanog brašna, za sve farmske životinje koje ulaze u lanac ishrane ljudi, izuzev ribljeg brašna za nepreživare. Kod nas je u skladu sa Zakonom o veterinarstvu iz 2005. uvedena obaveza za sve fabrike hrane za životinje da odvajaju linije u kojima se pripremaju koncentrati za preživare, ili da proizvodnju obavljaju na istoj liniji ali da se pri tome odreknu upotrebe hraniva životinjskog porekla. U skladu sa tim, vrši se stalni monitoring smeša za preživare. 
Zadnjih godina je korišćenje ribljeg brašna u ishrani nepreživara jako smanjeno zbog navedenih zakonskih ograničenja, sve lošije hranljive i upotrebne vrednosti (zdravstvene ispravnosti), problema falsifikovanja (dodavanja hraniva niže hranljive vrednosti: sojine sačme, kukuruznog glutena, brašna od perja pa čak i uree) kao i zbog visoke cene. Osim toga, dobro je poznato da riblje brašno prenosi svoj specifičan miris na proizvode pa se obavezno isključuje iz smeša pri kraju tova brojlera.
Velike količine ribljeg brašna se i danas koriste pri proizvodnji peletirane hrane za pastrmke i druge karnivore ribe. Naime, ove vrste riba zahtevaju visok nivo proteina dobre biološke vrednosti u obrocima. Ranih 90-ih godina preporučivan odnos svarljivih sirovih proteina i svarljive energije u obrocima za pastrmke je bio 22-25 g/MJ. Nasuprot tome, u zadnjoj dekadi eksperimentalno je dokazana efikasnost obroka sa većim sadržajem masti (>20%) i kada je odnos proteina i energije uži. Međutim, u tom slučaju treba obezbediti odgovarajući nivo esencijalnih aminokiselina. Objašnjenje je u specifičnom metabolizmu riba. Krajnji proizvod metabolizma proteina u riba je amonijak, za šta je potrebno manje energije. Nasuprot tome, krajnji proizvod metabolizma energije u svinja je urea, čime se objašnjava uži odnos proteina i energije (oko 14 g/KJ).
Zbog svega navedenog proizvođači teže da riblje brašno zamene (delimično ili potpuno) nekim drugim proteinskim hranivom (biljnog ili životinjskog porekla), pri čemu je jedan od glavnih ciljeva što niža cena proizvodnje. Do sada je najviše pažnje poklanjano proizvodima od soje, odnosno sojinoj sačmi. Ovo hranivo ima veliku biološku vrednost proteina ali i visok sadržaj različitih antinutritivnih materija. Nasuprot tome, efikasnijim se pokazao koncentrat proteina soje. To je hranivo koje se dobija uklanjanjem masti i rastvorljivih ugljenih hidrata. Eksperimentalno je utvrđena mogućnost delimične supstitucije ribljeg brašna suncokretovom sačmom, ali je glavni nedostatak ovog hraniva u velikoj količini nerastvorljivh ugljenih hidrata. Pored ovih hraniva, u eksperimentima su ispitivane sačme pamuka, kikirikija, uljane repice, brašno lupine, kukuruzni gluten, proteini krompira i dr. Međutim, nedostatak svih ovih hraniva je nizak nivo nekih esencijalnih aminokiselina kao i prisustvo antinutritivnih, štetnih i nesvarljivih materija. Jedno od potencijalnih proteinskih hraniva za ribe i domaće životinje je bakterijski protein. U pogledu brzine rasta i produkcije proteina, bakterije imaju prednost u odnosu na kvasce. Pored toga, bakterije sadrže i više proteina (do 80%), a aminokiselinski sastav je povoljniji i sličniji  proteinima životinjskog porekla. Nedostatak je velika količina nukleinskih kiselina (do 18%) koje u sisara katabolišu do mokraćne kiseline.
U zaključku se ističe da su troškovi ishrane ključni za rentabilnost proizvodnje u stočarstvu i nekim oblicima ribarske proizvodnje. Supstitucija ribljeg brašna u obrocima za domaće životinje i ribe je neophodnost zbog visoke cene ovog hraniva, varijabilnog kvaliteta i eventualnog falsifikovanja jeftinijim hranivima. Za sada, najveći značaj pokazuju proizvodi prerade soje a određenu perspektivu imaju i bakterijski proteini.",
journal = "5. International Conference “Aquaculture & Fishery” Faculty of Agriculture, Belgrade-Zemun, Serbia,",
title = "Importance Of Fish Meal And Other Animal Feedstuffs In Production Of Concentrate Mixtures, Značaj ribljeg brašna i drugih hraniva životinjskog porekla za proizvodnju smeša koncentrata",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5514"
}

Dinić, B., Djordjević, N., Grubić, G., Stojanović, B.,& Božičković, A.. (2011). Importance Of Fish Meal And Other Animal Feedstuffs In Production Of Concentrate Mixtures. in 5. International Conference “Aquaculture & Fishery” Faculty of Agriculture, Belgrade-Zemun, Serbia,.
https://hdl.handle.net/21.15107/rcub_agrospace_5514

Dinić B, Djordjević N, Grubić G, Stojanović B, Božičković A. Importance Of Fish Meal And Other Animal Feedstuffs In Production Of Concentrate Mixtures. in 5. International Conference “Aquaculture & Fishery” Faculty of Agriculture, Belgrade-Zemun, Serbia,. 2011;.
https://hdl.handle.net/21.15107/rcub_agrospace_5514 .

Dinić, Bora, Djordjević, Nenad, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, "Importance Of Fish Meal And Other Animal Feedstuffs In Production Of Concentrate Mixtures" in 5. International Conference “Aquaculture & Fishery” Faculty of Agriculture, Belgrade-Zemun, Serbia, (2011),
https://hdl.handle.net/21.15107/rcub_agrospace_5514 .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Popović, Zoran
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2644
AB  - The overview of the results of pheasant chicks feeding in pens is given in this paper. Rearing of pheasant chicks in the controlled environment is important because they are not produced in sufficient numbers in the nature. Body mass of pheasant chicks in the moment when they are released in the hunting ground is very important for their survival rate during the period when they are adapting to the natural conditions. It can be concluded from the published data that intensive rearing of pheasant chicks requires high protein levels, which in the first 30 days is between 28 and 32%, while later, in the period prior to the release they need 24 to 26% crude protein in the diet. Investigations in our country, where concentrate mixture with 30% protein was given until 28 days of age, and 24% protein from 28 to 42 day, the obtained body mass was 457.07g. Higher protein level than this is not rational, and may be harmful because it may cause pathological changes in liver and kidneys. After the first rearing phase pheasant chicks should be given grains and forage mass in order to prepare them for the feeding in the nature. The rearing is finished at the age of about 60 days, when they are released with body mass about 400-440 g.
AB  - U radu je dat pregled rezultata ishrane podmladka fazana u volijerama. Odgoj fazančića u kontrolisanim uslovima je neophodan zbog nedovoljne prirodne produkcije fazana. Telesna masa fazančića u momentu puštanja u lovište je jako važna za stepen preživljavanja u periodu prilagođavanja na prirodne uslove. Na osnovu literaturnih podataka može se zaključiti da intenzivan odgoj fazančića u kontrolisanim uslovima zahteva visok nivo proteina, koji u prvom periodu (do 30 dana) iznosi 28-32%, a kasnije, do ispuštanja u lovišta, 24-26%. U istraživanjima kod nas, pri korišćenju smeše sa 30% proteina do 28. dana starosti i sa 24% proteina od 28. do 42. dana starosti, ostvarena je telesna masa od 457,07 g. Veći nivo proteina od navedenog je neracionalan, a može biti i štetan jer dovodi do patoloških promena na jetri i bubrezima. Nakon prvog perioda odgoja, fazančićima se daje zrnasta hrana i zelena masa u cilju prilagođavanja na ishranu u prirodi. Odgoj fazančića se završava sa oko 60 dana starosti, kada se puštaju u lovište sa telesnom masom od 400 - 440 g.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Feeding pheasant chicks in pens
T1  - Ishrana fazančića u volijerama
EP  - 183
IS  - 3-4
SP  - 177
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2644
ER  - 

@article{
author = "Djordjević, Nenad and Popović, Zoran and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa",
year = "2011",
abstract = "The overview of the results of pheasant chicks feeding in pens is given in this paper. Rearing of pheasant chicks in the controlled environment is important because they are not produced in sufficient numbers in the nature. Body mass of pheasant chicks in the moment when they are released in the hunting ground is very important for their survival rate during the period when they are adapting to the natural conditions. It can be concluded from the published data that intensive rearing of pheasant chicks requires high protein levels, which in the first 30 days is between 28 and 32%, while later, in the period prior to the release they need 24 to 26% crude protein in the diet. Investigations in our country, where concentrate mixture with 30% protein was given until 28 days of age, and 24% protein from 28 to 42 day, the obtained body mass was 457.07g. Higher protein level than this is not rational, and may be harmful because it may cause pathological changes in liver and kidneys. After the first rearing phase pheasant chicks should be given grains and forage mass in order to prepare them for the feeding in the nature. The rearing is finished at the age of about 60 days, when they are released with body mass about 400-440 g., U radu je dat pregled rezultata ishrane podmladka fazana u volijerama. Odgoj fazančića u kontrolisanim uslovima je neophodan zbog nedovoljne prirodne produkcije fazana. Telesna masa fazančića u momentu puštanja u lovište je jako važna za stepen preživljavanja u periodu prilagođavanja na prirodne uslove. Na osnovu literaturnih podataka može se zaključiti da intenzivan odgoj fazančića u kontrolisanim uslovima zahteva visok nivo proteina, koji u prvom periodu (do 30 dana) iznosi 28-32%, a kasnije, do ispuštanja u lovišta, 24-26%. U istraživanjima kod nas, pri korišćenju smeše sa 30% proteina do 28. dana starosti i sa 24% proteina od 28. do 42. dana starosti, ostvarena je telesna masa od 457,07 g. Veći nivo proteina od navedenog je neracionalan, a može biti i štetan jer dovodi do patoloških promena na jetri i bubrezima. Nakon prvog perioda odgoja, fazančićima se daje zrnasta hrana i zelena masa u cilju prilagođavanja na ishranu u prirodi. Odgoj fazančića se završava sa oko 60 dana starosti, kada se puštaju u lovište sa telesnom masom od 400 - 440 g.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Feeding pheasant chicks in pens, Ishrana fazančića u volijerama",
pages = "183-177",
number = "3-4",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2644"
}

Djordjević, N., Popović, Z., Grubić, G., Stojanović, B.,& Božičković, A.. (2011). Feeding pheasant chicks in pens. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 17(3-4), 177-183.
https://hdl.handle.net/21.15107/rcub_agrospace_2644

Djordjević N, Popović Z, Grubić G, Stojanović B, Božičković A. Feeding pheasant chicks in pens. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2011;17(3-4):177-183.
https://hdl.handle.net/21.15107/rcub_agrospace_2644 .

Djordjević, Nenad, Popović, Zoran, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, "Feeding pheasant chicks in pens" in Zbornik naučnih radova Instituta PKB Agroekonomik, 17, no. 3-4 (2011):177-183,
https://hdl.handle.net/21.15107/rcub_agrospace_2644 .

TY  - JOUR
AU  - Djordjević, Nenad
AU  - Grubić, Goran
AU  - Stojanović, Bojan
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2585
AB  - In this paper we present the overview of the modern techniques for ensiling of maize and lucerne in order to obtain maximal quality and preservation of their nutritive value. I recent times it can be observed that special hybrids are being produced for maize silage, with the aim of greater digestibility. In previous decades investigations were focused on brown-midrib hybrids (bm3) due to their lower lignin content and increased in vitro NDF digestibility. In recent years much of the emphasis is placed on leafy maize hybrids for silage, which have large proportion of leaves , higher moisture in the grain and softer texture of the cob. In order to increase nutritive value of maize silage also the high oil and waxy hybrids are produced. In order to achieve maximal quality of lucerne silages and control in nutrient degradation during the ensiling process the various technological methods are developed, such as wilting, carbohydrate stimulation, inoculation and chemical conservation. Along with those methods which are not new, in recent times the selection of legume cultivars suitable for ruminant digestion is becoming important, and also genetic manipulations with the aim to decrease proteolysis during the ensiling process.
AB  - U radu je dat pregled savremenih postupaka pripremanja silaže kukuruza i senaže lucerke, koji se preduzimaju u cilju postizanja maskimalne hranljive vrednosti. Za pripremanje kuruzne silaže sve više se radi na selekcionisanju specijalnih hibrida povećane svarljivosti. Ranijih decenija su bili veoma aktuelni brown-midrib hibridi (bm3) zbog znatno nižeg udela lignina a time i povećane in vitro svarljivosti NDF vlakana. Zadnjih godina su dosta ispitivani leafy hibridi kukuruza za silažu, koji se karakterišu velikom količinom lišća, većim udelom vlage u zrnu i mekšom teksturom klipa. U cilju povećanja hranljive vrednosti kukuruzne silaže, gaje se hibridi sa povećanim sadržajem ulja- voskovci (waxy) i dr. U cilju postizanja maksimalnog kvaliteta silaža i kontrole degradacije hranljivih materija, u toku siliranja leguminoza koriste se različiti postupci kao što je provenjavanje, ugljenohidratna stimulacija, inokulacija i hemijsko konzervisanje. Pored ovih tehnologija starijeg datuma, u zadnje vreme vrši se selekcija sorti leguminoza na ruminalnu razgradivost, kao i genetske manipulacije u cilju smanjenja proteolize.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Modern technologies in ensiling maize and lucerne
T1  - Savremene tehnologije siliranja kukuruza i lucerke
EP  - 35
IS  - 3-4
SP  - 27
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2585
ER  - 

@article{
author = "Djordjević, Nenad and Grubić, Goran and Stojanović, Bojan and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2011",
abstract = "In this paper we present the overview of the modern techniques for ensiling of maize and lucerne in order to obtain maximal quality and preservation of their nutritive value. I recent times it can be observed that special hybrids are being produced for maize silage, with the aim of greater digestibility. In previous decades investigations were focused on brown-midrib hybrids (bm3) due to their lower lignin content and increased in vitro NDF digestibility. In recent years much of the emphasis is placed on leafy maize hybrids for silage, which have large proportion of leaves , higher moisture in the grain and softer texture of the cob. In order to increase nutritive value of maize silage also the high oil and waxy hybrids are produced. In order to achieve maximal quality of lucerne silages and control in nutrient degradation during the ensiling process the various technological methods are developed, such as wilting, carbohydrate stimulation, inoculation and chemical conservation. Along with those methods which are not new, in recent times the selection of legume cultivars suitable for ruminant digestion is becoming important, and also genetic manipulations with the aim to decrease proteolysis during the ensiling process., U radu je dat pregled savremenih postupaka pripremanja silaže kukuruza i senaže lucerke, koji se preduzimaju u cilju postizanja maskimalne hranljive vrednosti. Za pripremanje kuruzne silaže sve više se radi na selekcionisanju specijalnih hibrida povećane svarljivosti. Ranijih decenija su bili veoma aktuelni brown-midrib hibridi (bm3) zbog znatno nižeg udela lignina a time i povećane in vitro svarljivosti NDF vlakana. Zadnjih godina su dosta ispitivani leafy hibridi kukuruza za silažu, koji se karakterišu velikom količinom lišća, većim udelom vlage u zrnu i mekšom teksturom klipa. U cilju povećanja hranljive vrednosti kukuruzne silaže, gaje se hibridi sa povećanim sadržajem ulja- voskovci (waxy) i dr. U cilju postizanja maksimalnog kvaliteta silaža i kontrole degradacije hranljivih materija, u toku siliranja leguminoza koriste se različiti postupci kao što je provenjavanje, ugljenohidratna stimulacija, inokulacija i hemijsko konzervisanje. Pored ovih tehnologija starijeg datuma, u zadnje vreme vrši se selekcija sorti leguminoza na ruminalnu razgradivost, kao i genetske manipulacije u cilju smanjenja proteolize.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Modern technologies in ensiling maize and lucerne, Savremene tehnologije siliranja kukuruza i lucerke",
pages = "35-27",
number = "3-4",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2585"
}

Djordjević, N., Grubić, G., Stojanović, B., Božičković, A.,& Ivetić, A.. (2011). Modern technologies in ensiling maize and lucerne. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 17(3-4), 27-35.
https://hdl.handle.net/21.15107/rcub_agrospace_2585

Djordjević N, Grubić G, Stojanović B, Božičković A, Ivetić A. Modern technologies in ensiling maize and lucerne. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2011;17(3-4):27-35.
https://hdl.handle.net/21.15107/rcub_agrospace_2585 .

Djordjević, Nenad, Grubić, Goran, Stojanović, Bojan, Božičković, Aleksa, Ivetić, Aleksandra, "Modern technologies in ensiling maize and lucerne" in Zbornik naučnih radova Instituta PKB Agroekonomik, 17, no. 3-4 (2011):27-35,
https://hdl.handle.net/21.15107/rcub_agrospace_2585 .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2584
AB  - The effects of physically effective fiber concentration in rations for lactating cows on chewing activity, physiological and production characteristics are reviewed in the paper. In numerous investigations negative effects of decreasing of forage particle size were found, first of all in corn silage, alfalfa haylage and hay, on total chewing activity of dairy cows, ruminal pH, ruminal acetate to propionate ratio, digestibility of diet, milk yield and composition. Aside from the minimal chemical concentration of fibers, it is necessary to meet the required content of physically effective fiber from forages, which can be achieved with adequate chopping size of feeds. Optimal rations considering physical effectiveness, supply the required total chewing activity, adequate salivation and ruminal fermentation processes, efficient utilization of the diet, adequate milk yield and composition, and health in production animals.
AB  - U radu je razmatran efekat koncentracije fizički efektivnih vlakana u obrocima za krave u laktaciji na aktivnost žvakanja, fiziološke i proizvodne karakteristike. U većem broju istraživanja utvrđen je negativan efekat veće usitnjenosti kabastih hraniva, pre svega silaže cele biljke kukuruza, senaže lucerke i sena lucerke, na ukupnu aktivnost žvakanja kod krava, na ruminalnu pH vrednost, odnos koncentracije acetata i propionata u ruminalnom sadržaju, svarljivost obroka, proizvodnju i hemijski sastav mleka. Pored minimalnog hemijskog učešća vlakana, neophodno je obezbediti potreban sadržaj fizički efektivnih vlakana iz kabastog dela obroka, što se pre svega postiže odgovarajućom usitnjenošću kabastih hraniva. Optimalan obrok, sa aspekta fizičke efektivnosti, obezbeđuje potrebnu ukupnu aktivnost žvakanja, lučenje pljuvačke, normalan tok ruminalne fermentacije, efikasno iskorišćavanje konzumirane hrane, adekvatnu količinu i sastav proizvedenog mleka, i zdravlje proizvodnih životinja.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Effect of physically effective fiber content in dairy cows rations on chewing activity
T1  - Uticaj sadržaja fizički efektivnih vlakana u obroku za mlečne krave na aktivnost žvakanja
EP  - 48
IS  - 3-4
SP  - 37
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2584
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2011",
abstract = "The effects of physically effective fiber concentration in rations for lactating cows on chewing activity, physiological and production characteristics are reviewed in the paper. In numerous investigations negative effects of decreasing of forage particle size were found, first of all in corn silage, alfalfa haylage and hay, on total chewing activity of dairy cows, ruminal pH, ruminal acetate to propionate ratio, digestibility of diet, milk yield and composition. Aside from the minimal chemical concentration of fibers, it is necessary to meet the required content of physically effective fiber from forages, which can be achieved with adequate chopping size of feeds. Optimal rations considering physical effectiveness, supply the required total chewing activity, adequate salivation and ruminal fermentation processes, efficient utilization of the diet, adequate milk yield and composition, and health in production animals., U radu je razmatran efekat koncentracije fizički efektivnih vlakana u obrocima za krave u laktaciji na aktivnost žvakanja, fiziološke i proizvodne karakteristike. U većem broju istraživanja utvrđen je negativan efekat veće usitnjenosti kabastih hraniva, pre svega silaže cele biljke kukuruza, senaže lucerke i sena lucerke, na ukupnu aktivnost žvakanja kod krava, na ruminalnu pH vrednost, odnos koncentracije acetata i propionata u ruminalnom sadržaju, svarljivost obroka, proizvodnju i hemijski sastav mleka. Pored minimalnog hemijskog učešća vlakana, neophodno je obezbediti potreban sadržaj fizički efektivnih vlakana iz kabastog dela obroka, što se pre svega postiže odgovarajućom usitnjenošću kabastih hraniva. Optimalan obrok, sa aspekta fizičke efektivnosti, obezbeđuje potrebnu ukupnu aktivnost žvakanja, lučenje pljuvačke, normalan tok ruminalne fermentacije, efikasno iskorišćavanje konzumirane hrane, adekvatnu količinu i sastav proizvedenog mleka, i zdravlje proizvodnih životinja.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Effect of physically effective fiber content in dairy cows rations on chewing activity, Uticaj sadržaja fizički efektivnih vlakana u obroku za mlečne krave na aktivnost žvakanja",
pages = "48-37",
number = "3-4",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2584"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2011). Effect of physically effective fiber content in dairy cows rations on chewing activity. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 17(3-4), 37-48.
https://hdl.handle.net/21.15107/rcub_agrospace_2584

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Effect of physically effective fiber content in dairy cows rations on chewing activity. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2011;17(3-4):37-48.
https://hdl.handle.net/21.15107/rcub_agrospace_2584 .

Stojanović, Bojan, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, Aleksandra, "Effect of physically effective fiber content in dairy cows rations on chewing activity" in Zbornik naučnih radova Instituta PKB Agroekonomik, 17, no. 3-4 (2011):37-48,
https://hdl.handle.net/21.15107/rcub_agrospace_2584 .