安格斯肉牛与牦牛杂交及其效果研究

［目的］为了进一步优化牦牛肉品质，有效缩短牦牛养殖周期，提高其受胎率和犊牛成活率。［方法］本研究进行了安格斯肉牛与牦牛杂交试验，，利用安格斯肉牛冷冻精液，对251头经产母牦牛进行了人工授精。［结果］人工授精后，分别于2013年产犊42头，成活率66.67%；2014年产犊51头，成活率95.7%；2015年产犊67头，成活率91.04%。［结论］牦牛膘情较好时期，受胎率可达83.33%，接近于奶牛人工授精的受胎率，达到了青海省牦牛人工授精的较高水平。

Study on crossbreeding between Angus beef cattle and Yak and its effect

Abstract: Objective] In order to further optimize the quality of Yak meat, effectively shorten the breeding cycle, improve its conception rate and calf survival rate.Methods] In this study, the cross experiment between Angus beef cattle and Yak was carried out.251 parturient yaks were artificially inseminated with frozen semen of Angus beef cattle.Result] After artificial insemination, 42 calves were born in 2013, with a survival rate of 66.67%; 51 calves were born in 2014 with a survival rate of 95.7%; and 67 calves were born in 2015 with a survival rate of 91.04%.Conclusion] The conception rate of yak reached 83.33% in good fat period, which was close to the conception rate of artificial insemination of dairy cattle and reached the higher level of artificial insemination of Yaks in Qinghai Province. Key words: Angus beef cattle; Yak; Crossbreeding; Effect study