Supplementary Feeding of Grazing Dairy Cows
Apstrakt
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 meet...ing 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.
Ključne reči:
cows / intake / pasture / performancesIzvor:
International Symposium on Animal Science 2014, 23-25th September 2014, Belgrade, Serbia, 2014Finansiranje / projekti:
- Optimizacija tehnoloških postupaka i zootehničkih resursa na farmama u cilju unapređenja održivosti proizvodnje mleka (RS-MESTD-Technological Development (TD or TR)-31086)
Institucija/grupa
Poljoprivredni fakultetTY - 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 .