【摘要】 试验采用两组交叉饲养试验设计,选用6头黑白花奶牛。对照组用奶牛场现行精料配方,试验组用缓释尿素蛋白精料代替配方中56.7％的豆饼。对照组和试验组的平均精料采食量（kg/d·头）,标准乳产量（kg/d·头）及料奶比分别为:12.24和11.68;14.16和14.16;8.86和0. 82,两组差异不显著（P>0.1）。用缓释尿素蛋白糖料代替部分豆饼,奶牛生产性能不会降低。缓释尿素蛋白精料具有适口性、安全性和经济可行性。更多还原

【Abstract】 The alternate feeding experiment are carried out with six Friesion cows, to study the effects of the protein concentration adding the slow - releasing urea agent to the milk - producing performance. Comparing the formula of the farm with the formula of substituting 56.7% soy -bean with slow - releasing urea was made. The changes of appetite, health state, feed intake, standard milk yield of the two groups were observed. There are no significant difference in the average feed intake, HND production and milk composition between two groups. Substituting 56.7% soy-bean meal with slow - releasing urea protein concentration, the milk - producing performance will not reduce. Slow - releasing urea protein concentration is sate and economic.更多还原