冷季补饲对那曲牦牛生长性能和血液生化指标的影响

目的]为明确高寒牧区牦牛冷季补饲效果。方法]本试验通过测定日增重和采集血液去分析补饲精饲料对不同年龄那曲牦牛生长速度和血液生化指标的影响。结果]研究表明,2岁、3岁牦牛试验组和对照组的日增重均显著高于1岁、4岁(P0.05);在不同年龄间,牦牛各个年龄的试验组日增重均高于对照组,但1岁、2岁试验组极显著高于对照组(P0.01),3岁、4岁试验组日增重显著高于对照组(P0.05)。不同年龄阶段淀粉酶(AMY)、尿素氮(BUN)、尿素(UREA)差异极显著(P0.01),钙(Ca)、磷(P)和尿素氮/肌酐差异显著(P0.05)外,其余指标差异均不显著(P0.05),同一年龄的牦牛在不同的饲养管理水平下,各项生化指标中补饲牦牛的淀粉酶(AMY)、尿素氮(BUN)、尿素(UREA)极显著高于放牧牦牛(P0.01),钙(Ca)和尿素氮/肌酐显著高于放牧牦牛(P0.05),磷(P)显著低于放牧牦牛(P0.05)。结论]表明冷季补饲有效补充了那曲牦牛的机体能量,为其机体冷季正常生长发育提供了动力,从而提高了其越冬能力和适应性。

Effects of Supplementary Feeding in Cold Season on Growth Performance and Blood Biochemical Indexes of Naqu Yak

(Objective) In order to clarify the effect of supplementary feeding for yak in cold season in alpine pasturing area, this experiment determined and analyzed the effect of supplementary feeding concentrate on the growth rate and blood biochemical indexes of yak in that area of different ages. (Methods) The experimental data adopts SPSS 22.0 for one-way analysis of variance. (Results) The study showed that the daily weight gain of the 2-year-old and 3-year-old yak test group and the control group was significantly higher than that of the 1-year-old and 4-year-old (P<0.05); among different ages, the daily weight gain of the yak test group of various ages Both were higher than the control group, but the 1-year-old and 2-year-old test groups were extremely significantly higher than the control group (P<0.01), and the 3-year-old and 4-year-old test groups had significantly higher daily gains than the control group (P<0.05). The differences in amylase (AMY), urea nitrogen (BUN), and urea (UREA) at different ages are extremely significant (P<0.01), and there are significant differences in calcium (Ca), phosphorus (P) and urea nitrogen/creatinine (P<0.05). , The other indicators were not significantly different (P>0.05). Under different feeding and management levels for yak of the same age, the biochemical indicators included supplementary amylase (AMY), urea nitrogen (BUN), and urea (UREA) for yak Very significantly higher than grazing yak (P<0.01), calcium (Ca) and urea nitrogen/creatinine were significantly higher than grazing yak (P<0.05), and phosphorus (P) was significantly lower than grazing yak (P<0.05). (Conclusion) It shows that the cold season supplementary feeding effectively supplements the body energy of the Nagqu yak, and provides the driving force for the normal growth and development of the body in the cold season, thereby improving its overwintering ability and adaptability.