摘要:
To study the effects of supplemental level on the production performance of Gansu alpine fine-wool sheep in alpine pastoral areas,we selected 48 twelve-month-old reserve Gansu alpine fine-wool ewes and ran-domly divided them into group Ⅰ (fed pellet feed),group Ⅱ (corn and alfalfa hay),group Ⅲ (corn,alfalfa hay,and oat hay),and control group (no supplementary feeding)for winter and spring"grazing"+"feeding"tests.We compared physical indexes such as body weight,wool production,length,fineness,whiteness, strength,and elongation of sheep wool fiber.The results showed that the average daily gain in groups Ⅰ,Ⅱ, and Ⅲ was higher (148.29%,133.09%,and 96.76%,respectively)than that in the control group.The wool production was not significantly different between the groups (P>0.05).The natural length and stretched length were significantly lower in the control group than in groups Ⅰ,Ⅱ,and Ⅲ (P0.05).The strength and elongation were extremely significantly higher in the supplementary feeding group than in the control group (P0.05);自然长度和伸直长度对照组均极显著低于Ⅰ、Ⅱ、Ⅲ组(P0.05);强度和伸度补饲组均极显著高于对照组(P<0.01),且强度Ⅰ组极显著高于Ⅱ组(P<0.01),伸度Ⅰ组显著高于Ⅱ组(P<0.05).由此可见,补饲对体重、羊毛品质都有显著正向影响,高寒牧区冬春季节牧草营养缺乏,为了满足羊只营养需要,使甘肃高山细毛羊后备母羊能在1.5岁进行配种繁殖,在冷季放牧的基础上补饲1号料为最佳选择.