高寒牧区牦牛育肥试验研究

Study on Yak fattening trial in Alpine Pasture Area

试验结果表明 :天然草地不同牧草利用率下 ,牧草利用率为 3 0 %的绝对增重、相对增重和日增重比 5 0 %和 70 %的分别高 2 2kg和 8 1kg、2 3 4%和 8 5 1%、0 0 2kg和 0 0 7kg ,各处理间差异不显著 (P >0 0 5 ) ,但处理内不同放牧期间差异极显著 (P <0 0 1) ;天然草地、人工草地上不同年龄组条件下 ,天然草地上绝对增重和日增重分别高于人工草地上的 ,0 5岁犊牛组的相对增重高于对应的 1 5岁犊牛组 ,日增重各处理间差异不显著 (P >0 0 5 ) ,但处理内不同放牧期牦牛日增重差异极显著 (P <0 0 1) ;在暖棚舍饲条件下 ,高精料组 (第一组 )的绝对增重、相对增重和平均日增重分别比低精料组 (第二组 )和对照组高 5 9kg、4 94%、0 9kg和 3 1 44kg、2 6 5 9%、0 49kg ,低精料组 (第二组 )比对照组高 2 5 5 4kg、2 1 65 %和 0 4kg ,两处理之间同一放牧期牦牛的日增重差异极显著 (P <0 0 1) ,处理内不同放牧期牦牛的日增重差异显著 (P <0 0 5 )。

The different fattening trials had been done in alpine pasture.The trial results as following:Absolute body weight gain,relative body weight gain and average gain of treatment A were 2.2 kg and 8.1 kg,2.34% and 8.51%, 0.02 kg and 0.07 kg more than those of treatment B and C under different forage utilizing efficiency on artificial grassland,and no notable difference on yaks gain (P>0.05)was observed among different treatments,but there were greatly evident differences(P<0.01) among different period gain within the same treatment. Under different ages,yaks absolute body weight gain and average gain of two treatments on natural grassland were more than those of other two treatments on artificial grassland,and relative body weight gain of two treatments for 0.5 years old was more than that of other two treatment for 1.5years old,and no notable difference on yaks gain (P>0.05) was observed among different treatments,but there were greatly evident differences (P<0.01) among different period gain within the same treatment.Under shed feeding,absolute body weight gain,relative body weight gain and average gain of the first group were 5.9 kg,4.94%,0.9 kg and 31.44 kg,26.59%,0.49 kg more than those of the second and control group,and the second group were 5.54 kg,21.65% and 0.4 kg more than the control group,and greatly evident differences on yaks gain (P<0.01) was observed among different treatments,but there were notable differences(P<0.05) among different period gain within the same treatment(P<0.05).