Effects of supplemental urea sources and feeding frequency on ruminal fermentation, fiber digestion, and nitrogen balance in beef steers
作者： E.G. Alvarez Almora , G.B. Huntington , J.C. Burns
DOI: 10.1016/J.ANIFEEDSCI.2011.10.012
关键词: Fermentation 、 Agronomy 、 Hay 、 Animal science 、 Nitrogen 、 Digestion 、 Nitrogen balance 、 Dry matter 、 Rumen 、 Urea 、 Chemistry
摘要: Abstract The objective of two experiments was to evaluate non-protein N supplementation with protected urea sources in terms rumen fermentation products, nutrient digestibility, and balance ruminally fistulated beef steers (initial bodyweight 239 ± 18 kg) fed switchgrass hay. Experiment 1 compared Optigen II®, 2 RumaPro®. In both experiments, supplements (400 g/kg daily dietary dry matter) were once or every 2 h a balanced design. Supplements contained soybean hulls, corn grain, vitamins, minerals as well sources. Non-protein provided 0.18 g/g N. Switchgrass hay daily, at the same time supplement once-daily treatments. Dry matter intake (4.1 kg/d 1, 4.5 kg/d 2), digestibility (P
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sci-hub.se 参考文章(40)
E. Kolver, L.D. Muller, G.A. Varga, T.J. Cassidy, Synchronization of Ruminal Degradation of Supplemental Carbohydrate with Pasture Nitrogen in Lactating Dairy Cows Journal of Dairy Science. ,vol. 81, pp. 2017- 2028 ,(1998) , 10.3168/JDS.S0022-0302(98)75776-5
J.F. Inostroza, R.D. Shaver, V.E. Cabrera, J.M. Tricárico, Effect of Diets Containing a Controlled-Release Urea Product on Milk Yield, Milk Composition, and Milk Component Yields in Commercial Wisconsin Dairy Herds and Economic Implications The Professional Animal Scientist. ,vol. 26, pp. 175- 180 ,(2010) , 10.15232/S1080-7446(15)30577-5
J C Elizalde, N R Merchen, D B Faulkner, Supplemental cracked corn for steers fed fresh alfalfa: II. Protein and amino acid digestion. Journal of Animal Science. ,vol. 77, pp. 467- 475 ,(1999) , 10.2527/1999.772467X
J. C. Coomer, H. E. Amos, M. A. Froetschel, K. K. Ragland, C. C. Williams, Effects of supplemental protein source on ruminal fermentation, protein degradation, and amino acid absorption in steers and on growth and feed efficiency in steers and heifers Journal of Animal Science. ,vol. 71, pp. 3078- 3086 ,(1993) , 10.2527/1993.71113078X
International Society of Leather Trades' Chemists, Official Methods of Analysis ,(1980)
S. L. Archibeque, J. C. Burns, G. B. Huntington, Nitrogen metabolism of beef steers fed endophyte-free tall fescue hay: effects of ruminally protected methionine supplementation. Journal of Animal Science. ,vol. 80, pp. 1344- 1351 ,(2002) , 10.2527/2002.8051344X
K Taniguchi, G B Huntington, B P Glenn, Net nutrient flux by visceral tissues of beef steers given abomasal and ruminal infusions of casein and starch Journal of Animal Science. ,vol. 73, pp. 236- 249 ,(1995) , 10.2527/1995.731236X
R P Lana, J B Russell, Effect of forage quality and monensin on the ruminal fermentation of fistulated cows fed continuously at a constant intake. Journal of Animal Science. ,vol. 75, pp. 224- 229 ,(1997) , 10.2527/1997.751224X
H. V. Petit, D. M. Veira, Y. Yu, Growth and carcass characteristics of beef steers fed silage and different levels of energy with or without protein supplementation. Journal of Animal Science. ,vol. 72, pp. 3221- 3229 ,(1994) , 10.2527/1994.72123221X
Board on Agriculture, Division on Earth, Nutrient Requirements of Beef Cattle ,(2016)