CAJ | 학술논문

　　为了扩大中国牛群体繁殖、超数排卵和胚胎移植在中国能得到有效利用来限制进口牛。试验通过对供体牛进行超数排卵，比较了不同品种、供体牛经产与否、不同营养水平、重复超排间隔时间、起针时间5个因素对供体超数排卵效果的影响。结果表明：不同品种之间大部分超排效果无显著影响(P>0.05)；育成牛与经产牛的胚胎可利用率极显著差异(P<0.01)；不同营养水平组的胚胎可利用率极显著差异(P<0.01)；试验结果显示能使二次超排之间的间隔时间缩短为39天以内；第9~10天起针时间的超排效果最佳。本研究显示成体牛育成与否、营养水平高低、起针时间对供体牛超数排卵效果的影响极显著，而供体牛品种、重复超排次数对供体牛超数排卵效果不显著。
　　위료확대중국우군체번식、초수배란화배태이식재중국능득도유효이용래한제진구우。시험통과대공체우진행초수배란，비교료불동품충、공체우경산여부、불동영양수평、중복초배간격시간、기침시간5개인소대공체초수배란효과적영향。결과표명：불동품충지간대부분초배효과무현저영향(P>0.05)；육성우여경산우적배태가이용솔겁현저차이(P<0.01)；불동영양수평조적배태가이용솔겁현저차이(P<0.01)；시험결과현시능사이차초배지간적간격시간축단위39천이내；제9~10천기침시간적초배효과최가。본연구현시성체우육성여부、영양수평고저、기침시간대공체우초수배란효과적영향겁현저，이공체우품충、중복초배차수대공체우초수배란효과불현저。
In order to expand the breeding flock of cattle in China, multiple ovulation and embryo transfer breeding programs were applied to the limited number of imported cattle. This study investigated the effects of superovulation from five different breeds, parity (nulliparous and multiparous), different nutrition levels, the interval time of repeated superovulation, the time of treatment on cattle superovulation. The results showed that four different breeds did not significantly affect the results of superovulation (P>0.05). Nulliparous for superovulation treatment were better multiparous (P<0.01). The group of different nutrition levels extremely affected the results of superovulation. The trial investigated the optimal interval time of repeated superovulation was 39 days. The superovulation treatment consisted of eight intramuscular injections with the first FSH treatment on day 9 or 10. There were significantly affection of parity (nulliparous and multiparous), different nutrition levels, the time of treatment superovulation on cattle superovulation, and the effects were not significant of different breeds, the interval time of repeated superovulation on cattle superovulation.