天祝白牦牛的毛绒生产性能

Hair and Villus Production Performance of Tianzhu White Yak

[目的]分析天祝白牦牛的毛绒生产性能,为天祝白牦牛的遗传育种和毛绒产品开发提供条件。[方法]检测1～6岁不同性别的天祝白牦牛的毛绒产量和产绒率,计算其产绒量,并对这些毛绒生产性能评价指标进行统计分析。[结果]天祝白牦牛1～2岁时毛绒产量低,被毛含绒率和产绒量较高;3～6岁时毛绒产量、被毛含绒率、产绒量均较高;7岁以后毛绒产量、被毛含绒率和产绒量均明显降低。公牦牛的毛绒产量显著(P<0.05)或极显著(P<0.01)高于母牦牛;5～7岁母牦牛的被毛含绒率极显著(P<0.01)高于同龄公牦牛。[结论]1～2岁的天祝白牦牛绒用性能最好;3～6岁是生产毛绒的主要阶段;7岁后的天祝白牦牛不适于用于毛绒生产。

[ Objective] To analyze the hair and villus production performance of Tianzhu white yak and thus provide conditions for the genetic breeding and product development. [ Method ] The hair and villus yield as well as villus rate of male and female Tianzhu white yaks from one year to six years old was detected and the villus yield was also determined. And these indexes of hair and villus were analyzed to evaluate the production performance. [ Result ] In Tianzhu white yaks from one year to two years old, the hair and villus yield was lower, but the villus rate and yield were higher. The hair and villus yield, villus rate, and villus yield were all higher in Tianzhu white yaks from three years to six years old but significantly decreased in 7-year-old Tianzhu white yaks. In addition, the hair and villus yield was significantly （P 〈 0.05 ） or very significantly （P〈0.01） higher in male yaks than in female yaks. The villus rate was significantly （P〈0.01） higher than in female yaks from five years to seven years old than in male yaks of the same age. [ Conclusion] Tianzhu white yaks from one year to two years old, have the best hair and villus production performance; Tianzhu white yaks from three years to six years old are in the main phase of hair and villus production; Tianzhu white yaks older than seven years old should not be used for hair and villus production.