高原型藏绵羊春季补饲试验

Experiment on Supplementary Feeding for Tibetan Sheep of Plateau Type in Spring

【目的】研究旨在探讨补饲对减少冷季掉膘的作用。【方法】在西藏当雄选择年龄为4.5周岁(2胎)的泌乳期母羊、8-12月龄后备母羊,分别进行60、90 d的补饲试验。【结果】结果表明,泌乳母羊试验组增重0.61 kg,而泌乳母羊对照组活重损失4.94kg,两者之间存在极显著差异(P<0.01),补饲组间差异不显著(P<0.05);后备母羊试验组增重6.44 kg,而后备母羊对照组活重损失1.3 kg,两者之间存在极显著差异(P<0.01),补饲组间差异不显著(P<0.05)。【结论】在青藏高原高寒草地,春季牧草青黄不接、自然放牧绵羊普遍掉膘的情况下,通过补饲精料可以有效提高增重、减轻载畜压力,获得良好的经济效益。

[ Objective] The aim of research was the investigation on feeding which played a great role in decreasing losing body weight of Tibetan sheep in Spring. [ Method ] The lactating ewes of 4.5 years （2 tires） and reserve ewes of 8-12 months in Damxung were selected as tested materials, and the feeding trials of 60, 90 days were conducted, respectively. [ Result] The experimental lactating ewe weighted 0.61 kg, while the lactating ewe in control group reduced g. 94 kg, there were a significant difference between them （P 〈0.01 ）, and not significant difference between the feeding groups （ P 〈 0.05 ） ; The group of reserve ewes weighted 6.44 kg, while the reserve ewe in control group reduced 1.3 kg, extremely significant difference （P 〈0.01 ） existed between two groups, and the difference between the feeding groups was not significant（ P 〈 0.05 ）. [ Conclusion ] In alpine meadow, the spring was the period of short supply, natural feeding sheep reduced weight generally, so gaining weight was achieved by feeding concentrates, which could reduce the pressure of grazing capacity for obtaining the economic benefits.