应用促排多胎素诱导黄牛同期发情效果试验

Experiment on Synchronized Estrous of Yellow Cattle Induced by LHRH Injection

促排多胎素具有刺激成熟卵泡排卵，促进发情，调节发情周期，提高母畜受胎率的功效。本试验应用促排多胎素对农村分散饲养、产犊后久不发情或发情迟缓的母牛进行诱导同期发情效果研究。结果：在注射药物后24～72h内有91．67%(55/60)的母牛发情，经直肠检查发情母牛中排卵率为89．09%(49/55)，情期冷配受胎率为63．27%(31/49)。试验表明：促排多胎素对产后久不发情或发情迟缓的母牛进行诱导同期发情处理效果明显，是一种理想的催情药物。

LHRH injection stimulates the ovulation and estrous and regulated the estrous cycle to increase the conception rate of cows. The objective of the study is to investigate the effects of LHRH injection on synchronized estrous of cows without estrous after calving in the village feeding conditions. The resuits indicated that 91.67% （55/60） cows were in heat 24 to 72 hrs after injection, the ovulation rate was 89.09 % （49/55） by rectum palpation, the conception rate in estrous by frozen semen insemination was 63. 27% （31/49）, and the LHRH demonstrated the significant effect on inducing synchronized estrous of cows after calving.