【摘 要】
：
本研究通过饲养试验与屠宰试验来探讨限饲对绒山羊生产性能和屠宰性能的影响.将20只育成羊随机分成4组,即分别为自由采食组(AL)及自由采食组采食量的90％(IR90％)、80％( IR80％)和70
【机 构】
：
中国农业大学动物科学技术学院,辽宁省畜牧科学研究院
论文部分内容阅读
本研究通过饲养试验与屠宰试验来探讨限饲对绒山羊生产性能和屠宰性能的影响.将20只育成羊随机分成4组,即分别为自由采食组(AL)及自由采食组采食量的90％(IR90％)、80％( IR80％)和70％( IR70％).正式试验期为90 d.结果表明:AL的日增重比IR90％组、IR80％组显著高出91.21％和194.92％(P＜0.05),但IR90％和IR80％之间无显著差异(P＞0.05),另外IR70％组的日增重为-6.3 g/d.宰前活体重、空体重、胴体重和屠宰率随着营养水平的降低有所减少(P＜0.05).随着营养水平的降低,肾周脂肪、系网膜脂肪占空体重的比例显著减少(P.＜0.05).随着限饲强度的增加,日增重逐渐下降,体内脂肪沉积也随之减少.综合分析显示,绒山羊的限饲的阈值为IR80％.
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