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  - 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  - 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  - Ivetić, Aleksandra
AU  - Djordjević, Nenad
AU  - Radin, Dragoslava
AU  - Stojić, Petar
AU  - Grubić, Goran
AU  - Stojanović, Bojan
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3388
AB  - Aerobic stability is a term that indicates the length of the time that silage remains cool and does not spoil after it is exposed to air. Therefore, rapid removal of air from forage mass and prevention of air infiltration into the silage during storage and feed out are the important factors that determine the duration of the silage aerobic stability. The measurement of CO2 production, separately or in combination with other measurements such as temperature, pH, lactic acid and volatile fatty acids and microbial examination, can serve as a reliable laboratory method to determine the duration of silages aerobic stability in silages. This paper work has aim to point on the importance of determination the duration of aerobic stability of silages, because quality changes and losses in the case of aerobic degradation.
AB  - Aerobna stabilnost je termin kojim se definiše dužina vremena za koje silaža ostaje hladna i ne kvari se po izlaganju vazduhu. Zbog toga, brzo otklanjanje vazduha iz silaže tokom siliranja i smanjeno izlaganje vazduhu po otvaranju silosa su dva važna faktora koji određuju dužinu aerobne stabilnosti silirane stočne hrane. U proceni aerobnog kvarenja,merenje proizvodnje CO2, odvojeno ili u kombinaciji sa drugim parametrima kao što je temperatura silaže, pH vrednost, sadržaj mlečne i sirćetne kiseline i mikrobiološka analiza, mogu se koristiti kao pouzdani laboratorijski metod. Ovaj rad ima za cilj da ukaže na značaj procene vremena trajanja aerobne stabilnosti stočne hrane,zbog promena i gubitaka kvaliteta pri aerobnoj degradaciji.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Importance of aerobic stability in silages
T1  - Značaj aerobne stabilnosti silirane stočne hrane
EP  - 60
IS  - 3-4
SP  - 47
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3388
ER  - 

@article{
author = "Ivetić, Aleksandra and Djordjević, Nenad and Radin, Dragoslava and Stojić, Petar and Grubić, Goran and Stojanović, Bojan",
year = "2013",
abstract = "Aerobic stability is a term that indicates the length of the time that silage remains cool and does not spoil after it is exposed to air. Therefore, rapid removal of air from forage mass and prevention of air infiltration into the silage during storage and feed out are the important factors that determine the duration of the silage aerobic stability. The measurement of CO2 production, separately or in combination with other measurements such as temperature, pH, lactic acid and volatile fatty acids and microbial examination, can serve as a reliable laboratory method to determine the duration of silages aerobic stability in silages. This paper work has aim to point on the importance of determination the duration of aerobic stability of silages, because quality changes and losses in the case of aerobic degradation., Aerobna stabilnost je termin kojim se definiše dužina vremena za koje silaža ostaje hladna i ne kvari se po izlaganju vazduhu. Zbog toga, brzo otklanjanje vazduha iz silaže tokom siliranja i smanjeno izlaganje vazduhu po otvaranju silosa su dva važna faktora koji određuju dužinu aerobne stabilnosti silirane stočne hrane. U proceni aerobnog kvarenja,merenje proizvodnje CO2, odvojeno ili u kombinaciji sa drugim parametrima kao što je temperatura silaže, pH vrednost, sadržaj mlečne i sirćetne kiseline i mikrobiološka analiza, mogu se koristiti kao pouzdani laboratorijski metod. Ovaj rad ima za cilj da ukaže na značaj procene vremena trajanja aerobne stabilnosti stočne hrane,zbog promena i gubitaka kvaliteta pri aerobnoj degradaciji.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Importance of aerobic stability in silages, Značaj aerobne stabilnosti silirane stočne hrane",
pages = "60-47",
number = "3-4",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3388"
}

Ivetić, A., Djordjević, N., Radin, D., Stojić, P., Grubić, G.,& Stojanović, B.. (2013). Importance of aerobic stability in silages. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 19(3-4), 47-60.
https://hdl.handle.net/21.15107/rcub_agrospace_3388

Ivetić A, Djordjević N, Radin D, Stojić P, Grubić G, Stojanović B. Importance of aerobic stability in silages. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2013;19(3-4):47-60.
https://hdl.handle.net/21.15107/rcub_agrospace_3388 .

Ivetić, Aleksandra, Djordjević, Nenad, Radin, Dragoslava, Stojić, Petar, Grubić, Goran, Stojanović, Bojan, "Importance of aerobic stability in silages" in Zbornik naučnih radova Instituta PKB Agroekonomik, 19, no. 3-4 (2013):47-60,
https://hdl.handle.net/21.15107/rcub_agrospace_3388 .

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  - Grubić, Goran
AU  - Stojić, Petar
AU  - Djordjević, Nenad
AU  - Beskorovajni, Radmila
AU  - Ivetić, Aleksandra
AU  - Miletić, Aleksandar
AU  - Simić, Divna
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3389
AB  - Last year (2012) will be marked as one of the worst in the History of Agriculture in Republic of Serbia. Heat and drought affected low quantity and quality of forage. In the same year we had lack of hay and maize silage. According weather forecast and anti­cipated climatic changes in the future, farmers need to found new ways to provide forage, especially in the "no irrigation" plant farming. In that way, ensiling of whole-crop cereals could be one of the solutions, because of theirs nutritive values, yields and all risks of heat and drought from planting to harvesting.
AB  - Protekla 2012. god. u istoriji poljoprivredne proizvodnje u Srbiji biće označena kao jedna od najnepovoljnijih, posebno kada je u pitanju količina i kvalitet kabaste stočne hrane za ishranu preživara, naročito mlečnih krava (nedostatak i slab kvalitet sena i silaža kukuruza). Sa postojećim klimatskim predviđanjima u budućnosti se može očekivati nedostatak kabaste stočne hrane u uslovima "suvog" ratarenja. Jedno od mogućih rešenja je korišćenje strnih žita za pripremanje silaža i sena, kako zbog svojih nutritivnih vrednosti, tako i zbog prinosa i smanjenih rizika od suše i visokih temperatura.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Whole-crop cereals silage: Quality forage in the heat and drought condition
T1  - Silaže strnih žita - kvalitetna kabasta hrana u uslovima visokih temperatura i suša
EP  - 70
IS  - 3-4
SP  - 61
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3389
ER  - 

@article{
author = "Grubić, Goran and Stojić, Petar and Djordjević, Nenad and Beskorovajni, Radmila and Ivetić, Aleksandra and Miletić, Aleksandar and Simić, Divna",
year = "2013",
abstract = "Last year (2012) will be marked as one of the worst in the History of Agriculture in Republic of Serbia. Heat and drought affected low quantity and quality of forage. In the same year we had lack of hay and maize silage. According weather forecast and anti­cipated climatic changes in the future, farmers need to found new ways to provide forage, especially in the "no irrigation" plant farming. In that way, ensiling of whole-crop cereals could be one of the solutions, because of theirs nutritive values, yields and all risks of heat and drought from planting to harvesting., Protekla 2012. god. u istoriji poljoprivredne proizvodnje u Srbiji biće označena kao jedna od najnepovoljnijih, posebno kada je u pitanju količina i kvalitet kabaste stočne hrane za ishranu preživara, naročito mlečnih krava (nedostatak i slab kvalitet sena i silaža kukuruza). Sa postojećim klimatskim predviđanjima u budućnosti se može očekivati nedostatak kabaste stočne hrane u uslovima "suvog" ratarenja. Jedno od mogućih rešenja je korišćenje strnih žita za pripremanje silaža i sena, kako zbog svojih nutritivnih vrednosti, tako i zbog prinosa i smanjenih rizika od suše i visokih temperatura.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Whole-crop cereals silage: Quality forage in the heat and drought condition, Silaže strnih žita - kvalitetna kabasta hrana u uslovima visokih temperatura i suša",
pages = "70-61",
number = "3-4",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3389"
}

Grubić, G., Stojić, P., Djordjević, N., Beskorovajni, R., Ivetić, A., Miletić, A.,& Simić, D.. (2013). Whole-crop cereals silage: Quality forage in the heat and drought condition. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 19(3-4), 61-70.
https://hdl.handle.net/21.15107/rcub_agrospace_3389

Grubić G, Stojić P, Djordjević N, Beskorovajni R, Ivetić A, Miletić A, Simić D. Whole-crop cereals silage: Quality forage in the heat and drought condition. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2013;19(3-4):61-70.
https://hdl.handle.net/21.15107/rcub_agrospace_3389 .

Grubić, Goran, Stojić, Petar, Djordjević, Nenad, Beskorovajni, Radmila, Ivetić, Aleksandra, Miletić, Aleksandar, Simić, Divna, "Whole-crop cereals silage: Quality forage in the heat and drought condition" in Zbornik naučnih radova Instituta PKB Agroekonomik, 19, no. 3-4 (2013):61-70,
https://hdl.handle.net/21.15107/rcub_agrospace_3389 .

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  - 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 .

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/123456789/2553
AB  - In study are determined effects of four different mean lengths of corn silage, alfalfa haylage and total mixed ration (TMR) for lactating cows on physical effectiveness (pef), physically effective fiber content (peNDF) and total chewing activity. High correlations were found between mean particle length of forages and TMR and their physical effectiveness in lactating cows nutrition as also with physically effective fiber content. Significant effect of ration particle size on stimulating total chewing activity of lactating cows was determined.
AB  - U istraživanju je determinisan uticaj četiri različita stepena usitnjenosti silaže cele biljke kukuruza, senaže lucerke i kompletno mešanog obroka za krave u laktaciji, na fizičku efektivnost (pef), sadržaj fizički efektivnih vlakana (peNDF), i ukupnu aktivnost žvakanja. Utvrđena je visoka povezanost stepena usitnjenosti kabastih hraniva i kompletnog obroka sa njihovom fizičkom efektivnošću u ishrani krava, kao i sa sadržajem fizički efektivnih vlakana. Ustanovljen je statistički značajan efekat stepena usitnjenosti obroka na stimulisanje ukupne aktivnosti žvakanja kod krava u laktaciji.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows
T1  - Uticaj stepena usitnjenosti kabastih hraniva i kompletnog obroka za krave u laktaciji na fizičku efektivnost i aktivnost žvakanja
EP  - 942
IS  - 3
SP  - 935
VL  - 27
DO  - 10.2298/BAH1103935S
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2011",
abstract = "In study are determined effects of four different mean lengths of corn silage, alfalfa haylage and total mixed ration (TMR) for lactating cows on physical effectiveness (pef), physically effective fiber content (peNDF) and total chewing activity. High correlations were found between mean particle length of forages and TMR and their physical effectiveness in lactating cows nutrition as also with physically effective fiber content. Significant effect of ration particle size on stimulating total chewing activity of lactating cows was determined., U istraživanju je determinisan uticaj četiri različita stepena usitnjenosti silaže cele biljke kukuruza, senaže lucerke i kompletno mešanog obroka za krave u laktaciji, na fizičku efektivnost (pef), sadržaj fizički efektivnih vlakana (peNDF), i ukupnu aktivnost žvakanja. Utvrđena je visoka povezanost stepena usitnjenosti kabastih hraniva i kompletnog obroka sa njihovom fizičkom efektivnošću u ishrani krava, kao i sa sadržajem fizički efektivnih vlakana. Ustanovljen je statistički značajan efekat stepena usitnjenosti obroka na stimulisanje ukupne aktivnosti žvakanja kod krava u laktaciji.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows, Uticaj stepena usitnjenosti kabastih hraniva i kompletnog obroka za krave u laktaciji na fizičku efektivnost i aktivnost žvakanja",
pages = "942-935",
number = "3",
volume = "27",
doi = "10.2298/BAH1103935S"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2011). Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 27(3), 935-942.
https://doi.org/10.2298/BAH1103935S

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows. in Biotechnology in Animal Husbandry. 2011;27(3):935-942.
doi:10.2298/BAH1103935S .

Stojanović, Bojan, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, Aleksandra, "Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows" in Biotechnology in Animal Husbandry, 27, no. 3 (2011):935-942,
https://doi.org/10.2298/BAH1103935S . .

TY  - JOUR
AU  - Stojanović, Bojan
AU  - Grubić, Goran
AU  - Djordjević, Nenad
AU  - Božičković, Aleksa
AU  - Ivetić, Aleksandra
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2298
AB  - The minimal content of physically effective fiber is necessary in diets for lactating cows. Physically effective fiber (peNDF) stimulates chewing activity during eating and ruminating, salivation and reticulorumen contractions. The concentration of peNDF in total mixed rations for high-producing cows affects animal health, rumen fermentation, feed intake, nutrient digestibility, milk yield and composition. Efficient system for determination of peNDF content in forages (corn silage and alfalfa haylage) and total mixed ration (TMR) for lactating cows is based on using Penn State Particle Separator (PSPS) sieve system. The cut length of corn silage mostly determines physical effectiveness of TMR and significantly affects physiological and production performances of lactating cows. A proper chop length of forages as part of total mixed ration is significant parameter for diet formulating that should be consider equally with chemical composition.
AB  - U obroku krava je neophodno prisustvo minimalnog sadržaja fizički efektivnih vlakana. Fizički efektivna vlakna (peNDF) predstavljaju vlakna u obroku krava koja efektivno stimulišu aktivnost žvakanja pri konzumiranju i preživanju hrane, lučenje pljuvačke i kontrakcije retikulorumena. Sadržaj fizički efektivnih vlakana u kompletnom obroku za visokomlečne krave utiče na zdravlje životinja, ruminalnu fermentaciju, konzumiranje i svarljivost obroka, proizvodnju i hemijski sastav mleka. Efikasan sistem za utvrđivanje stepena usitnjenosti, odnosno fizičke efektivnosti kabastih hraniva (silaža kukuruza i senaža lucerke) i kompletnih obroka za krave u laktaciji, kao i koncentracije peNDF, zasniva se na primeni sistema sita Penn State Particle Separator (PSPS). Dužina odrezaka silaže cele biljke kukuruza u velikoj meri definiše fizičku efektivnost TMR-a i time značajno utiče na fiziološke i proizvodne osobine krava u laktaciji. Odgovarajuća usitnjenost kabastih hraniva u kompletnom obroku predstavlja značajan parametar pri formulisanju obroka, koji treba razmatrati ravnopravno sa njegovim hemijskim sastavom.
PB  - Institut PKB Agroekonomik, Padinska skela
T2  - Zbornik naučnih radova Instituta PKB Agroekonomik
T1  - Effects of corn silage cut length and physically effective fiber in high-yielding dairy cows nutrition
T1  - Efekat stepena usitnjenosti silaže kukuruza i fizički efektivnih vlakana u ishrani visokoproizvodnih krava
EP  - 39
IS  - 3-4
SP  - 31
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2298
ER  - 

@article{
author = "Stojanović, Bojan and Grubić, Goran and Djordjević, Nenad and Božičković, Aleksa and Ivetić, Aleksandra",
year = "2010",
abstract = "The minimal content of physically effective fiber is necessary in diets for lactating cows. Physically effective fiber (peNDF) stimulates chewing activity during eating and ruminating, salivation and reticulorumen contractions. The concentration of peNDF in total mixed rations for high-producing cows affects animal health, rumen fermentation, feed intake, nutrient digestibility, milk yield and composition. Efficient system for determination of peNDF content in forages (corn silage and alfalfa haylage) and total mixed ration (TMR) for lactating cows is based on using Penn State Particle Separator (PSPS) sieve system. The cut length of corn silage mostly determines physical effectiveness of TMR and significantly affects physiological and production performances of lactating cows. A proper chop length of forages as part of total mixed ration is significant parameter for diet formulating that should be consider equally with chemical composition., U obroku krava je neophodno prisustvo minimalnog sadržaja fizički efektivnih vlakana. Fizički efektivna vlakna (peNDF) predstavljaju vlakna u obroku krava koja efektivno stimulišu aktivnost žvakanja pri konzumiranju i preživanju hrane, lučenje pljuvačke i kontrakcije retikulorumena. Sadržaj fizički efektivnih vlakana u kompletnom obroku za visokomlečne krave utiče na zdravlje životinja, ruminalnu fermentaciju, konzumiranje i svarljivost obroka, proizvodnju i hemijski sastav mleka. Efikasan sistem za utvrđivanje stepena usitnjenosti, odnosno fizičke efektivnosti kabastih hraniva (silaža kukuruza i senaža lucerke) i kompletnih obroka za krave u laktaciji, kao i koncentracije peNDF, zasniva se na primeni sistema sita Penn State Particle Separator (PSPS). Dužina odrezaka silaže cele biljke kukuruza u velikoj meri definiše fizičku efektivnost TMR-a i time značajno utiče na fiziološke i proizvodne osobine krava u laktaciji. Odgovarajuća usitnjenost kabastih hraniva u kompletnom obroku predstavlja značajan parametar pri formulisanju obroka, koji treba razmatrati ravnopravno sa njegovim hemijskim sastavom.",
publisher = "Institut PKB Agroekonomik, Padinska skela",
journal = "Zbornik naučnih radova Instituta PKB Agroekonomik",
title = "Effects of corn silage cut length and physically effective fiber in high-yielding dairy cows nutrition, Efekat stepena usitnjenosti silaže kukuruza i fizički efektivnih vlakana u ishrani visokoproizvodnih krava",
pages = "39-31",
number = "3-4",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2298"
}

Stojanović, B., Grubić, G., Djordjević, N., Božičković, A.,& Ivetić, A.. (2010). Effects of corn silage cut length and physically effective fiber in high-yielding dairy cows nutrition. in Zbornik naučnih radova Instituta PKB Agroekonomik
Institut PKB Agroekonomik, Padinska skela., 16(3-4), 31-39.
https://hdl.handle.net/21.15107/rcub_agrospace_2298

Stojanović B, Grubić G, Djordjević N, Božičković A, Ivetić A. Effects of corn silage cut length and physically effective fiber in high-yielding dairy cows nutrition. in Zbornik naučnih radova Instituta PKB Agroekonomik. 2010;16(3-4):31-39.
https://hdl.handle.net/21.15107/rcub_agrospace_2298 .

Stojanović, Bojan, Grubić, Goran, Djordjević, Nenad, Božičković, Aleksa, Ivetić, Aleksandra, "Effects of corn silage cut length and physically effective fiber in high-yielding dairy cows nutrition" in Zbornik naučnih radova Instituta PKB Agroekonomik, 16, no. 3-4 (2010):31-39,
https://hdl.handle.net/21.15107/rcub_agrospace_2298 .

TY  - JOUR
AU  - Ivetić, Aleksandra
AU  - Grubić, Goran
AU  - Stojanović, Bojan
PY  - 2009
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1887
AB  - Feeding behavior of dairy cows in the captive, industrials systems of rearing is different than natural, because when animals feel hunger, behavior realization of the basic instincts is deprived. In addition, depending from the way of raising, differences exist in behavior of dairy cows during the feeding. Aim of this study was to explore this difference with statistical approach. In the experiment, feeding behavior of 35 dairy cows was observed, black - white breed in the Holstein type. Dairy cows were divided into two groups, group of 15 dairy cows raised in the farm with tied system and 20 dairy cows raised in the farm with free system. With sequentional analyses and with statistical data processing we determinate numerical values of high statistical significant interactions between activities inside each farm, and on the contrary we do not determinate statistical significant interaction in feeding behavior of dairy cows between farms.
AB  - Hranidbeno ponašanje krava u laktaciji u zatvorenim, intenzivnim sistemima je drugačije od prirodnog, zbog uskraćenosti realizacije osnovnih nagona pri osećaju gladi. Takođe, u zavisnosti od načina gajenja, postoje razlike u ponašanju krava u laktaciji tokom ishrane. Cilj istraživanja hranidbenog ponašanja krava u laktaciji je bio da se metodom sekvencione analize utvrde razlike. U ogledu su korišćene krave u laktaciji, crno bele rase u tipu Holštajna, 15 gajenih u vezanom i 20 gajenih na farmi sa slobodnim sistemom gajenja. Sekvencionom analizom i statističkom obradom podataka, odredili smo brojne visoko statistički signifikantne interakcije aktivnosti u hranidbenom ponašanju krava u laktaciji u okviru svake farme, dok između farmi nije dobijen statistički signifikantan broj interakcija.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Analyses of feeding behavior of dairy cows
T1  - Analiza hranidbenog ponašanja krava u laktaciji
EP  - 676
IS  - 5-6-2
SP  - 669
VL  - 25
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1887
ER  - 

@article{
author = "Ivetić, Aleksandra and Grubić, Goran and Stojanović, Bojan",
year = "2009",
abstract = "Feeding behavior of dairy cows in the captive, industrials systems of rearing is different than natural, because when animals feel hunger, behavior realization of the basic instincts is deprived. In addition, depending from the way of raising, differences exist in behavior of dairy cows during the feeding. Aim of this study was to explore this difference with statistical approach. In the experiment, feeding behavior of 35 dairy cows was observed, black - white breed in the Holstein type. Dairy cows were divided into two groups, group of 15 dairy cows raised in the farm with tied system and 20 dairy cows raised in the farm with free system. With sequentional analyses and with statistical data processing we determinate numerical values of high statistical significant interactions between activities inside each farm, and on the contrary we do not determinate statistical significant interaction in feeding behavior of dairy cows between farms., Hranidbeno ponašanje krava u laktaciji u zatvorenim, intenzivnim sistemima je drugačije od prirodnog, zbog uskraćenosti realizacije osnovnih nagona pri osećaju gladi. Takođe, u zavisnosti od načina gajenja, postoje razlike u ponašanju krava u laktaciji tokom ishrane. Cilj istraživanja hranidbenog ponašanja krava u laktaciji je bio da se metodom sekvencione analize utvrde razlike. U ogledu su korišćene krave u laktaciji, crno bele rase u tipu Holštajna, 15 gajenih u vezanom i 20 gajenih na farmi sa slobodnim sistemom gajenja. Sekvencionom analizom i statističkom obradom podataka, odredili smo brojne visoko statistički signifikantne interakcije aktivnosti u hranidbenom ponašanju krava u laktaciji u okviru svake farme, dok između farmi nije dobijen statistički signifikantan broj interakcija.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Analyses of feeding behavior of dairy cows, Analiza hranidbenog ponašanja krava u laktaciji",
pages = "676-669",
number = "5-6-2",
volume = "25",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1887"
}

Ivetić, A., Grubić, G.,& Stojanović, B.. (2009). Analyses of feeding behavior of dairy cows. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 25(5-6-2), 669-676.
https://hdl.handle.net/21.15107/rcub_agrospace_1887

Ivetić A, Grubić G, Stojanović B. Analyses of feeding behavior of dairy cows. in Biotechnology in Animal Husbandry. 2009;25(5-6-2):669-676.
https://hdl.handle.net/21.15107/rcub_agrospace_1887 .

Ivetić, Aleksandra, Grubić, Goran, Stojanović, Bojan, "Analyses of feeding behavior of dairy cows" in Biotechnology in Animal Husbandry, 25, no. 5-6-2 (2009):669-676,
https://hdl.handle.net/21.15107/rcub_agrospace_1887 .