[目的]通过胚胎移植技术充分发挥中国西门塔尔牛(草原类型群)优秀母畜的繁殖潜力,为其在繁殖生产中的应用与推广提供技术参考.[方法]对68头青年中国西门塔尔牛(草原类型群)采用CIDR+PG+ADE法进行分批同期发情和胚胎移植,测定发情率、受胎率,根据肉用母牛体况评分技术规程对受体牛的体况进行评分.[结果]中国西门塔尔牛(草原类型)的同期发情率达79.4%,胚胎移植受胎率达40.7%;4月青年母牛发情率相对较高(84.2%),7月受胎率相对较高(45.5%);20~24月龄膘情中等的青年母牛的移植受胎率(60%)显著高于16~19月龄或过于膘大母牛的受胎率;体况评分4~6分的青年母牛受胎率(46.2%)高于体况评分1~3分和7~9分的青年母牛.1头牛进行胚胎移植的成本为1.34万元.[结论]本地区引种胚胎移植的方法从经济上分析是可行的.
[Objectives]The reproductive potential of elite female Chinese Simmental cattle(grassland-type herd)was fully utilized with the application of embryo transplantation technology to provide technical references for its application and promotion in reproductive production.[Methods]68 young Chinese Simmental cattle(grassland-type herd)were subjected to batch synchronous estrus and embryo transplantation using the CIDR+PG+ADE method.The estrus rate and conception rate were measured.The body condition of the recipient cows was scored according to the technical regulations for evaluating the body condition of beef cows.[Results]The synchronous estrus rate of Chinese Sim-mental cattle(grassland-type herd)was 79.4%,and the conception rate of embryo transplantation was 40.7%.The estrus rate of young cows in April was relatively high(84.2%),and the conception rate in July was relatively high(45.5%).The conception rate of embryo transplantation(60%)of young cows aged 20-24 months with moderate fatness was significantly higher than that of cows aged 16-19 months or big fatness.The conception rate(46.2%)of young cows with a body condition score of 4-6 was higher than that of young cows with a body condition score of 1-3 and 7-9.The cost of embryo transplantation for one cow is 13400 yuan.[Conclusions]Introducing embryo transplantation in this area is economically feasible.