Abstract:Through the application of synchronized estrus technology in multiple batches of imported long-yearling Hu sheep,small tail cold sheep,and local tan sheep from Dongxiang,Guanghe,and Huining,which are major sheep-raising counties,and the study of the application effect of room-temperature artificial insemination and synchronized estrus technology.The results show that:(1)Statistical test data analysis of lake sheep,small tail cold sheep in the same period of 96%,95%.Using artificial insemination technology to breed concurrent estrous ewes.The conception rate reached 82% and 80% respectively.The rate of batch production is controlled below 2%.The lambing rate reached 203%,227%,respectively.The application effect is obvious.Poor application effect of the local breed tan sheep in the non-estrus period.The period rate below 20%.Apply the same estrus technology in estrus.The same period rate reached 91%,the abortion rate reached 75%,the lambing rate reached 77.5%.The application effect is still good.In the crossbreeding offspring of different breeds with the Hu sheep and small tail cold sheep,the small tail cold sheep showed more obvious hybrid advantage,with their hybrid lambs having higher birth weight,weaning weight,and 6month weight than the Hu sheep.The optimal hybrid combination was Austrilia uhite×small tail cold sheep.The study concluded that Lake sheep and small tail cold sheep with perennial estrus characteristics have obvious effect of applying the simultaneous estrus technology in the scale sheep farm,which can be vigorously promoted and applied.Seasonal estrous tan sheep,alpine fine wool sheep and other sheep varieties have obvious effect in the same estrous technology,but poor application effect in the non-breeding season,which is not recommended.
