丰草期贵州半细毛羊补饲精料育肥效果

Exuberant Grass Period Guizhou Semi- wool Sheep Fattening Effect of Feeding Concentrate

在牧草丰草期(5月中旬至9月初),随机选择断奶后体重相近的贵州半细毛羊40只,10只为对照组(正常放牧,不补饲),另30只为试验组(放牧+补饲),进行短期(3个月)育肥试验,定期测定羊体重、日增重,并进行屠宰性能测定。结果:试验组总增重和日增重分别为15.6 3 kg/只、169.93 g/d,对照组总增重和日增重分别为9.8 kg/只、106.52 g/d,体重增重效果试验组高于对照组。试验组胴体重、屠宰率、胴体净肉率、GR值、脂肪厚均高于对照组,骨率和骨肉比则低于对照组,但从增重效益比较,试验组成本较高。结果表明:在丰草期对半细毛羊进行补饲可提高其增重,但结合补饲成本及其增重的投入产出比较,补饲经济效益不明显。

In the period of Exuberant grasses （mid - May to early September）, randomly selected after weaning weights similar were 40 Guizhou semi - wool sheep, 10 for the control group （ normal grazing, no feeding）, another 30 for the test group （ grazing ＋ supplementary feeding）, the weight short -term （three months） fattening, average daily gain of the sheep were regularly measured, and the slaughter performance was determined. Result the total weight gain and daily gain of the test group were 15.63 kg/per, 169.93 g/d, the total weight gain and daily gain of the control group were 9.8 kg/per, 106.52 g/d, weight gain effect test group was higher than that in control group. Carcass weight, slaughter rate, net meat percentage, car- cass fat thickness, GR value of test group is higher than the control group, bone rate and bone ratio were lower than those in control group, however weight gain benefits compared to test the composition of the higher. The results show, in the abundance of grass semi fine wool sheep were feeding can improve their weight gain, but the combination of feeding costs and gain input and output compared to feeding obvious economic benefits.