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

Animal Husbandry and Feed Science 2011年第6期3卷 5-6页

作者： LI Ying-guang YANG De-cheng LI Jun-ping GUAN Chao ZHANG Yuan-qing YANG Zhong ZHANGXi-zhong YANG Xiao-min Animal Genetics and Breeding Centre of Shanxi Province Taiyuan 030027 China Cadre School of Agriculture in Shanxi Province Taiyuan 030024 China Modern Agriculture Research Centre of Shanxi Taiyuan 030031 China Institute of Animal Husbandry and Veterinary Science Shanxi Academy of Agricultural Science Taiyuan 030032 China

[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

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