暖季补饲精料对生长牦牛生长性能和血液指标的影响

Effect of Supplementary Concentrations on the Growth Performance and Blood Indexes of Growing Yaks in Warm Season

本研究旨在探索暖季补饲能量饲料和蛋白饲料对生长牦牛生长性能及血液指标的影响。试验选用(2±0.5)岁健康无病的母牦牛30头,随机分为3组,每组10头,青稞组和菜籽饼组牦牛每头在放牧基础上分别补饲1 kg/d青稞和菜籽饼,对照组全放牧。试验期37 d。结果表明:青稞组、菜籽饼组平均日增重分别为0.75 kg/d和0.68 kg/d,分别比对照组提高了120.59%(P<0.05)和100.00%(P<0.05),青稞组平均日增重比菜籽饼组提高了10.29%(P=0.053);与对照组相比较,青稞组和菜籽饼组对生长牦牛血浆中总蛋白、白蛋白含量无显著影响(P>0.05),青稞组和菜籽饼组谷草转氨酶、瘦素、生长激素的含量显著升高(P<0.05),青稞组胰岛素浓度、菜籽饼组甘油三酯浓度显著升高(P<0.05);青稞组血浆尿素氮浓度最低,与其他两组差异显著(P<0.05)。暖季对生长牦牛补饲青稞或菜籽饼能提高牦牛生长性能,补饲青稞优于补饲菜籽饼。

This study was conducted to evaluate th e effect of supplementary energy or protein feed on the growth performance and blood indexes of growing yaks in the warm season. 30 male yaks aged 2±0.5 were selected and assigned randomly to one of three treatments. Grazed Yak feed hullessbarley （1kg/d） or rapeseed cake （1kg/d） was group hullessbarley （H）, group Rapeseed cake （R）, respectively. And the control treatment （CK） was grazing only. The trial lasted for 37 days. Results： The average daily gain （ADG） were 0.75kg/d and 0.68kg/d in H and R, which was 120.59%（P〈0.05）, 100.00%（P〈0.05） increased contrast with CK, respectively; ADG of H was 110.29% of R which was tender to higher （P=0.053）. Contrast with CK the supplementation significantly （P〈0.05） increased the content of GOT, GH and leptin in plasma of yaks, respectively. H significantly （P〈0.05） increased the content insulin in plasma, H significantly （P〈0.05） increased the content Triglyceride in plasma. Plasma urea nitrogen concentration was lowest （P〈0.05） in H. These results indicate that growth performance of growing yaks can be improved when hullessbarley or Rapeseed cake was supplemented, hullessbarley was better than rapeseed cake.