断奶后舍饲精喂对内蒙古呼伦贝尔短尾羊日增重的影响

为研究断奶后对家畜舍饲精喂饲料,呼伦贝尔羊中的"短尾品系"(简称呼伦贝尔短尾羊)日增重的变化,选取家庭牧场植被相似的典型牧户,典型牧户家畜数量为400只母羊和400只羔羊。试验采取与牧民合作的形式进行控制性试验,以全年传统自由放牧为对照组,哺乳期断奶后舍饲精喂饲料加自由放牧为控制组。结果表明:舍饲使得羔羊日增重差异性显著(P<0.05),公羔的平均日增重最大可达210.8±8.48 g·d^-1。不同月龄母畜对舍饲精喂的显著性差异表现不同,其中18个月以上月龄的母羊日增重差异性显著,且月龄越大,差异越显著。舍饲使得不同月龄段的母羊之间日增重差异性显著,12个月龄以下的母畜日增重最大,达到126.26±5.23 g·d^-1。因此断奶后对家畜舍饲精喂饲料对家畜个体生产性能的提高具有重要的促进作用。

Daily Weight Gain of Hulun Buir Short Tail Sheep in Response to Greenhouse Precision Feeding after Weaning in Inner Mongolia

In order to research the weight changes of Hulun Buir short tail sheep precisely fed in greenhouse after weaning, typical households where pasture had the similar vegetation with 400 ewes and 400 lambs were selected. The experiment was carried out by cooperating with the herders using whole-year traditional freedom grazing as control group and greenhouse precision feeding as experimental group. The study showed that greenhouse precision feeding significantly affected the daily weight gain of lamb(P<0.05). On average, the daily weight gain of male lamb was 210.8±8.48 g·d^-1. Meanwhile greenhouse precision feeding treatment had significantly different effects on the female sheep of different age groups, and the female daily gain of more than 18 months was significantly different compared with others. The daily weight gain of female sheep precisely fed in greenhouse had significant difference among different age groups. The female sheep(<12 months) had the largest daily weight gain, up to 126.26±5.23 g·d^-1. Therefore, greenhouse feeding after weaning plays an important role in promoting the productivity of sheep.