冬春放牧及补饲精料促使肉牛生长的试验

Expriment on Beef Cattle Growth Promoted by Grazing and Concentrate Supplement in Winter and Spring

试验采用随机区组组合排列方法分为5个处理组，每处理重复了3次，共15个试验小区，每小区放养婆罗门杂交断奶阉牛4头，试验期126天，每隔21天称重1次。结果表明：除仅在自然草地放牧、不补饲的阉牛在全试验期减重4kg外，其他4组试验牛分别增重19，15，65和52kg，与第一处理组相比，差异显著（P＜0．05）。

60weaned steers of crosses of Brahman and Shorthorn were selected for this expriment using the Randomizde Block Design which included five levels with 3 repeats and 15 blocks. The expriment period was 126 days,the body weight fo steers was weighed every 3 weeks. The result showed that the weight gain of 4 exprimental groups were 19, 15, 65and 52 kg which was significantly more than that of control group with 4 kg decrease of body weight in the whole period (p＜0.05)