As compared with control group, weight gain rates of yaks aged2,3,4 years in experiment group increased by 20.1,14.5 and 4.9 percent unit resp.
试验结果：2岁牦牛增重效果最好，增重率提高20．1个百分点，3岁牦牛次之，增重率提高14．5个百分点，4岁牦牛最差，增重率提高4．9个百分点；
As compared with control group, weight gain rates of yaks aged2,3,4 years in experiment group increased by 20.1,14.5 and 4.9 percent unit resp.
试验结果：2岁牦牛增重效果最好，增重率提高20．1个百分点，3岁牦牛次之，增重率提高14．5个百分点，4岁牦牛最差，增重率提高4．9个百分点；
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