摘要
为培育优质泌乳奶牛,研究不同生理阶段后备牛日粮的最佳蛋白质水平。采用生长比较试验、消化代谢试验和屠宰试验研究蛋白质水平对后备牛的影响。结果表明,①0～2月龄哺乳期犊牛,代乳粉中粗蛋白水平22%为宜;②3～4月龄断奶犊牛,开食料中粗蛋白水平20%最佳;③8～10月龄后备母牛,在日粮消化能为13.17MJ/kg时,粗蛋白水平约12%,蛋白能量比为37.9:1(g/Mcal),可满足ADG为0.9kg/d时的生长需要。结论,蛋白水平对后备奶牛的生长发育非常重要。
To cultivate high-quality dairy cows, the best protein level in diets for different physiological stages of young cattle was studied. Comparison experiment, metabolism trial and slaughter test were used in the program. （1The results showed that 0 to 2 month old calves, 22% of crude protein level in milk replacer was appropriate; （2）3-4 months old weaned calves, 20% crude protein level in starter ration was the best; （3）8-10 months old heifer, 12% CP level, DE level 13.17 MJ/kg and the CP to DE ratio 37.9 ： 1 （g/Mcal） in the diet could meet the requirement of daily gain about 0.9 kg. Conclusions, CP levels had a great effect on growth and development of different physiological stages of young cattle.
出处
《饲料工业》
北大核心
2010年第A02期15-19,共5页
Feed Industry
基金
国家科技支撑计划子课题
奶牛营养调控及高效饲养技术研究(2006BAD04A03-03)
