生长犊牛蛋白质需要量及其代谢规律研究  

Study on Protein Requirement and Metabolic Rule of Growing Beef Cattle

作　　者：姜淑贞[1] 杨维仁[1] 杨在宾[1] 张崇玉[1] 闫庆兵 葛金山 常静 王茂军 

机构地区：[1]山东农业大学动物科技学院,泰安271018 [2]泰安市众成饲料科技有限公司 [3]山东肥城市畜牧局

出　　处：《中国草食动物》2001年第2期3-5,共3页China Herbivores

基　　金：国家"九五"重点攻关项目 !(96 -0 0 3- 0 3- 0 3)

摘　　要：选择 10月龄鲁西黄牛×利木赞杂交公牛 15头 ,采用饲养试验和消化代谢试验 ,研究生长犊牛的蛋白质需要量及其代谢规律。试验结果表明 ,生长犊牛对日粮蛋白质的消化率为 6 1 37% ,沉积率为 2 7 6 2 %。生长肉牛代谢粪氮 (MFN)和内源尿氮 (EUN)的排出量分别为 0 4 0 g/kgw0 75·d和 0 11g/kgw0 75·d。生长犊牛维持可消化粗蛋白需要量为 5 81g/kgw0 75·d ,每增重 1kg需可消化粗蛋白 153 0 9g。并推导出生长犊牛可消化粗蛋白总需要量 (RDCP ,RCP ,g/d)Select cross breed (Luxi×Limousin)bull 15 heads at the age of 10 months.Feeding trial,digestion and metabolism experiment were conducted in order to study the protein requirement and metabolic rule of the beef cattle. The experiment showed the following results.The protein digestibility of the diet by the beef cattle was 61 37%,the deposit rate of the protein was 27 61%.The MFN and EUN of the growing beef cattle were 0 40 g/kgw 0 75 ·d respectively.The digestible,crude protein maintenance requirement of beef cattle was 5 81 g/kgw 0 75 ·d.The digestible crude repuirement for each kilogram weight gain was 153 09 g.

关 键 词：生长犊牛 蛋白质 需要量 代谢规律 饲养试验 消化代谢试验 

分 类 号：S823.41[农业科学—畜牧学] S852.231[农业科学—畜牧兽医]