【作者】 王家贵；

【导师】 吴建平；

【作者基本信息】 甘肃农业大学 ， 动物遗传育种与繁殖， 2007， 硕士

【摘要】 本试验通过对不同季节、生态环境和饲养条件下的不同品种、不同生理状况的绵羊进行CIDR 12d+PMSG 200IU处理以达到同期发情效果,并对发情母羊适时输精、配种,详细记录各组母羊的发情时间、配种时间、返情复配时间、产羔时间、产羔数和产后发情时间;对不同条件下影响同期发情效果的因素进行了分析研究。试验结果表明:1.使用CIDR(绵羊阴道孕酮海绵栓)12d+PMSG 200IU对不同季节、不同地区、不同绵羊品种处理观察,在第一个情期内均获得了较理想的同期发情率,分别为87.61%、84.17%、92.5%和84.6%。2.同期发情处理中初产母羊的第一情期发情率极显著的低于经产母羊,p<0.01。3.在注射PMSG后24h,48h和72h内的发情母羊分别占到发情母羊总数的13.61%,55.0%和31.39%。4.在第8天对初产母羊进行换栓,第12天取栓注射PMSG 200IU可显著提高初产母羊第一情期发情率和受胎率。更多还原

【Abstract】 In this paper, the exogenous hormone was injected into different sheep breeds which were fed in different ecological environment, feeding conditions& seasons, to realize synchronization of estrus. Estrus ewes were treated with artificial insemination in the right time. Estrus time, transport time, second insemination time in estrus return, lambing time and litter size were record in detail. The ewes of Small-tailed Han Sheep were classified to core group and production group according to the existence or absence of mutate B gene.The fecundity ewes in the offspring were the supplement of the ewe group. The results were as follows:1. The CIDR 12d + PMSG 200IU treatment got high synchronized estrus rate in the 1st estrus time, 87.61%, 84.17%, 92.5% and 84.60%respectively. The mean synchronized estrus rate was 89.33%.2. The estrus rate of the primiparous ewes’1st estrus cycle is significantly lower than the multiparous ewes’.3. The respective estrus rate of 24h,48h and 72h after injecting PMSG are 13.61%,55.0% and 31.39%.4. changing CIDR in 8th day, injecting 200IU PMSG can significantly improve the estrus rate & CR of the primiparous ewes’1st estrus cycle.更多还原