补饲对牦牛生长发育影响的研究

Effect of supplementary feeding on growth and development of Yak

中文关键词: 牦牛  生长发育  潜力挖掘

英文关键词: Yak, growth  and development, potential  mining, supplementary  feeding

中文摘要:

      (目的)为了充分挖掘牦牛生长发育潜力及补饲对其的影响,(方法)随机选择6月龄健康无病、体重相近的斯布牦牛20头分为试验组和对照组,每组公母各5头共计10头,在共同放牧条件下,试验组晚间自由采食草料精料比7:3混合饲料,对照组不予补饲,试验分3个阶段共计18个月(每6个月为一阶段)开展牦牛生长发育潜力挖掘研究。(结果)结果表明：第一阶段结束时,试验组牛的平均体重为79.20 kg,极显著的高于对照组牛的59.40 kg(P＜0.01)；第二阶段结束时,试验组牛的平均体重为126.85 kg,极显著的高于对照组牛的99.53 kg(P＜0.01)；第三阶段结束时,试验组牛的平均体重为155.05 kg,极显著的高于对照组犊牦牛的114.10 kg(P＜0.01)。整个试验期,试验组牛的体重较初始体重增加了101.10 kg,极显著的高于对照组牛的59.40 kg(P＜0.01)。(结论)说明通过放牧+补饲方式饲养6月龄牦牛至24月龄,较传统放牧条件下,牦牛18个月的总增重提高了70.20 %,效果极显著。

英文摘要:

      This study aims to mine the growth and development potential of the Yak, explore the influence of supplementary feeding on Yak. In this study, 20 Sibu Yaks were selected randomly, which were 6 months old, healthy, disease-free, and similar in weight. The experimental and the control group both had 5 males and 5 females Yaks. The experimental group freely ate a 7:3 mixture of forage at night, and the control group did not. The experiment last 18 months, which was divided into 3 stages, every stage had 6 months. Results showed that the average weight of the experimental group cattle was extremely significantly higher than the control group in three stages (79.20kg>59.40kg, P＜0.01, 126.85kg>99.53kg, P＜0.01, 155.05kg>114.10kg, P＜0.01, respectively). Throughout the test period, the body weight of the test group cattle increased by 101.10kg, which was extremely significantly higher than the control group (P<0.01). In conclusion, feeding 6-month-old yak to 24 months old by grazing and supplementary feeding method, the body weight of Yak increased by 70.2 percent through 18 months, which is significantly higher than the control group.