Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy

Some environmental factors affecting the gross efficiency of crude protein (GECP) were studied using 2824 records of 501 lactating Holstein cows. The effects of some independent variables on the GECP were tested using a general linear model analysis. The GECP was significantly affected by parity and pregnancy stage and linearly related to dry matter intake, milk yield, milk fat, protein and lactose percentages, protein and lactose yields, dietary levels of net energy for lactation (NEL), crude protein (CP), ruminally undegradable protein (RUP), and ether extract (EE). Quadratic relation to the GECP with dietary levels of NEL, CP, RUP, and EE were also significant. This study showed that high producing animals, especially high protein yielding cows are more efficient users of dietary CP. Dietary requirements of NEL, RUP, and EE to maximize the GECP were estimated as 1.61 Mcal/kg, 7.14%, and 5.42%, respectively. In comparison to NRC estimations, it seems that more NEL, less CP, and more RUP are needed to maximize the protein efficiency of lactating dairy cows.

Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy

Some environmental factors affecting the gross efficiency of crude protein (GECP) were studied using 2824 records of 501 lactating Holstein cows. The effects of some independent variables on the GECP were tested using a general linear model analysis. The GECP was significantly affected by parity and pregnancy stage and linearly related to dry matter intake, milk yield, milk fat, protein and lactose percentages, protein and lactose yields, dietary levels of net energy for lactation (NEL), crude protein (CP), ruminally undegradable protein (RUP), and ether extract (EE). Quadratic relation to the GECP with dietary levels of NEL, CP, RUP, and EE were also significant. This study showed that high producing animals, especially high protein yielding cows are more efficient users of dietary CP. Dietary requirements of NEL, RUP, and EE to maximize the GECP were estimated as 1.61 Mcal/kg, 7.14%, and 5.42%, respectively. In comparison to NRC estimations, it seems that more NEL, less CP, and more RUP are needed to maximize the protein efficiency of lactating dairy cows.

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Bibtex @ { tbtkveterinary150809, journal = {Turkish Journal of Veterinary and Animal Sciences}, issn = {1300-0128}, eissn = {1303-6181}, address = {}, publisher = {TÜBİTAK}, year = {2011}, volume = {35}, pages = {123 - 130}, doi = {}, title = {Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy}, key = {cite}, author = {Zamanı, Pouya and Mıraeı-ashtıanı, Seyed Reza and Alıpour, Daryoush and Alıarabı, Hasan} }
APA Zamanı, P , Mıraeı-ashtıanı, S , Alıpour, D , Alıarabı, H . (2011). Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy . Turkish Journal of Veterinary and Animal Sciences , 35 (2) , 123-130 .
MLA Zamanı, P , Mıraeı-ashtıanı, S , Alıpour, D , Alıarabı, H . "Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy" . Turkish Journal of Veterinary and Animal Sciences 35 (2011 ): 123-130 <
Chicago Zamanı, P , Mıraeı-ashtıanı, S , Alıpour, D , Alıarabı, H . "Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy". Turkish Journal of Veterinary and Animal Sciences 35 (2011 ): 123-130
RIS TY - JOUR T1 - Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy AU - Pouya Zamanı , Seyed Reza Mıraeı-ashtıanı , Daryoush Alıpour , Hasan Alıarabı Y1 - 2011 PY - 2011 N1 - DO - T2 - Turkish Journal of Veterinary and Animal Sciences JF - Journal JO - JOR SP - 123 EP - 130 VL - 35 IS - 2 SN - 1300-0128-1303-6181 M3 - UR - Y2 - 2021 ER -
EndNote %0 Turkish Journal of Veterinary and Animal Sciences Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy %A Pouya Zamanı , Seyed Reza Mıraeı-ashtıanı , Daryoush Alıpour , Hasan Alıarabı %T Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy %D 2011 %J Turkish Journal of Veterinary and Animal Sciences %P 1300-0128-1303-6181 %V 35 %N 2 %R %U
ISNAD Zamanı, Pouya , Mıraeı-ashtıanı, Seyed Reza , Alıpour, Daryoush , Alıarabı, Hasan . "Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy". Turkish Journal of Veterinary and Animal Sciences 35 / 2 (Şubat 2011): 123-130 .
AMA Zamanı P , Mıraeı-ashtıanı S , Alıpour D , Alıarabı H . Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy. Turkish Journal of Veterinary and Animal Sciences. 2011; 35(2): 123-130.
Vancouver Zamanı P , Mıraeı-ashtıanı S , Alıpour D , Alıarabı H . Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy. Turkish Journal of Veterinary and Animal Sciences. 2011; 35(2): 123-130.
IEEE P. Zamanı , S. Mıraeı-ashtıanı , D. Alıpour ve H. Alıarabı , "Statistical evaluation of some environmental factors affecting the gross efficiency of crude protein in high producing dairy", Turkish Journal of Veterinary and Animal Sciences, c. 35, sayı. 2, ss. 123-130, Şub. 2011
Turkish Journal of Veterinary and Animal Sciences
  • ISSN: 1300-0128
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK

61.6b55.9b

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