【摘要】 由于饲养管理、使役程度、生长发育、饲养环境、季节变化及光照时间等自然生态条件的影响 ,母牛的发情也有差异。为了正确掌握母牛繁殖规律 ,对晋南母牛的初情与性成熟、发情表现、发情持续期、排卵时间及适时输精进行了研究探讨。更多还原

【Abstract】 The variation of reproductive performance could be caused by management, drafting, season, environment, photo periods, growth, and other ecological factors, the puberty, maturity, estrous, estrous time, ovulation and insemination time of female Jinnan cattle were investigated to master the reproduction characters更多还原