摘要
选择3月龄健康、体重105．31±2．50kg的利木赞×鲁西黄牛杂交犊牛36头，采用饲养试验、消化代谢试验和比较屠宰试验，研究了4～6月龄犊牛的能量需要量及其代谢规律。研究在蛋白质水平一致的条件下，根据生产中常用的三个精粗比例分三个能量水平。试验结果表明，试验日粮的能量对4～6月龄犊牛的能量的平均消化率（DE／GE）为66．77％，总能代谢率（ME／GE）和消化能代谢率（ME／DE）分别为56．92％和85．25％。犊牛在4-6月龄时的雏持的净能需要为398．68KJ／kgW^0.75·d，增重的净能需要为11490KJ／kg。
Thirty-six cross-breed（Luxi× Limousin） calves , three months old and weight 105.31±2. 50kg , were selected to study the energy requirement and metabolic rule of the calves by feeding trial, digestion-metaboiism and comparative slaughtering experiment. With the same protein level , this experiment were divided into three energy levels by means of three different ratio of concentrate and roughage. The resuits showed： The average energy digestible rate of the diet was 66.77% ,the gross energy metabolic rate （ME/GE）was 56.92%, the digestible energy metabolic rate （ME/DE）was 85.25%. The net energy requirement for maintenance was 398, 68KJ/kgW^0.75 · d, and the net energy requirement for gain was 11490KJ/kg.
出处
《家畜生态学报》
2007年第1期23-26,共4页
Journal of Domestic Animal Ecology
基金
国家"十五肉牛科技攻关计划(编号2002BA514A-2-1)
关键词
犊牛
能量
需要量
代谢规律
calves
energy
requirement
metabolic rule
