Effects of Non-protein Nitrogen Supplement on Growth Performance of Graze Cattle  

作　　者：LI Ying-guang YANG De-cheng LI Jun-ping GUAN Chao ZHANG Yuan-qing YANG Zhong ZHANGXi-zhong YANG Xiao-min 

机构地区：[1]Animal Genetics and Breeding Centre of Shanxi Province, Taiyuan 030027, China [2]Cadre School of Agriculture in Shanxi Province,Taiyuan 030024, China [3]Modern Agriculture Research Centre of Shanxi, Taiyuan 030031, China [4]Institute of Animal Husbandry and Veterinary Science, Shanxi Academy of Agricultural Science, Taiyuan 030032, China

出　　处：《Animal Husbandry and Feed Science》2011年第6期5-6,共2页动物与饲料科学（英文版）

基　　金：funded by the National Key Technology R&D Program for the 11th Five-Year Plan (2006BAD29B05 and 2006BAD56B04);Achievements Conversion Fund of Shanxi Science and Technology Department,Animal Breeding Fund of Shanxi Academy of Agricultural Sciences,Shanxi Natural Science Foundation (2010011040-4);Doctor Research Fund of Shanxi Academy of Agricultural Sciences (YBSJJ0901)

摘　　要：[Objective] The experiment was conducted to investigate the growth performance of graze cattle fed on non-protein nitrogen （NPN） supplement. [ Method] The experiment was conducted in late spring and early summer before grazing. Thirty Chinese SimmentaI-Taihang taxa bulls at the age of 9-10 months weighing 150-170 kg were divided into the control group, experimental group 1 and experimental group 2, 10 in each group, Each cattle in the experimental group 1 fed on the basal diet supplemented 1.0 kg cornmeal every day. Each cattle in the experimental group 2 fed on the basal diet supplemented 1.0 kg cornmeal and 0.25 kg NPN supplement every day. Those in the control group were fed on the basal di- et. The experiment was performed for 100 d. [Result] The average daily gain of the experimental group I was 217 g larger than that of the control group, while the average daily gain of the experimental group 2 was 429 g larger than that of the control group. The differences in the average daily gain were significant between the three groups. [ Conclusion ] The growth performance of cattle grazed in northern slopes was obviously improved by supplementing a small amount of concentrate in feed. The improvement was more remarkable if a small amount of NPN supplement was also added in feed.[Objective] The experiment was conducted to investigate the growth performance of graze cattle fed on non-protein nitrogen （NPN） supplement. [ Method] The experiment was conducted in late spring and early summer before grazing. Thirty Chinese SimmentaI-Taihang taxa bulls at the age of 9-10 months weighing 150-170 kg were divided into the control group, experimental group 1 and experimental group 2, 10 in each group, Each cattle in the experimental group 1 fed on the basal diet supplemented 1.0 kg cornmeal every day. Each cattle in the experimental group 2 fed on the basal diet supplemented 1.0 kg cornmeal and 0.25 kg NPN supplement every day. Those in the control group were fed on the basal di- et. The experiment was performed for 100 d. [Result] The average daily gain of the experimental group I was 217 g larger than that of the control group, while the average daily gain of the experimental group 2 was 429 g larger than that of the control group. The differences in the average daily gain were significant between the three groups. [ Conclusion ] The growth performance of cattle grazed in northern slopes was obviously improved by supplementing a small amount of concentrate in feed. The improvement was more remarkable if a small amount of NPN supplement was also added in feed.

关 键 词：Taihang taxa bull Non-protein nitrogen supplement Graze Supplementary feeding Weight gain 

分 类 号：S823.5[农业科学—畜牧学] S828.5[农业科学—畜牧兽医]