应用生殖激素对小尾寒羊同期发情效果研究

Study of reproductive hormone on the synchronization of estrus of small-tail sheep

应用羊用孕酮栓、孕马血清促性腺激素和氯前列烯醇相结合的方法对 99只空怀小尾寒羊和 36只哺乳母羊 (产后 2 5～ 35d)进行同期发情试验研究。结果表明 ,99只空怀母羊在 2 4h内的同期发情率达到 81 8% ,4 8h内为 89 9%。孕酮栓在空怀母羊阴道内埋置不同时间 (12d与 14d)的同期发情率无显著差异 (P >0 0 5 ) ;对空怀母羊注射不同剂量 (330IU/只和 2 5 0IU/只 )孕马血清促性腺激素对羊的同期发情率的影响无显著差异 (P >0 0 5 )。 36只哺乳母羊在 2 4h与 4 8h内的同期发情率均为 80 6 % (2 9/36 ) ,对哺乳母羊注射孕马血清促性腺激素 2 5 0IU/只的同期发情率为 90 0 % (18/2 0 ) ,优于注射 330IU/只的同期发情率 6 8 8% (11/16 )。

unpregnancnt thin-tail sheep and 36 loctational small-tail sheep (procreated after 25～35 d) will be synchronization of estrus with enestrusin and pregnant mare's gonadotrophin and cloprostenol. The result shows that the estrus rate of 99 sheep is 81.8% in 24 h; 89.9% in 48 h and that of loctational sheep is 80.6% in 24 h, the same as in 48 h. The estrus rate is different with enestrusin after 12 d or 14 d (P>0.05). The estrus rate with 330 IU PMSG is also different from with 250 IU PMSG. The estrus rate of loctational sheep injected 330 IU PMSG or 250 IU/PMSG is 68.8% and 90.0% respectively.