1, increase the utilization of excellent herd sire;2, accelerating livestock genetic improvement;3, reduce the cost of feeding and management;4, reproductive control the spread of the disease;5, improve conception rate of female;6, to promote regional and international exchanges of herd sire.
正在翻譯中..
![](//zhcntimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)