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ying yong yun ma xue qing (pmsg) you dao he si tan qing nian mu niu fa qing shi yan
Author(s): 
Pages: 75-75
Year: Issue:  12
Journal: China Dairy Cattle

Abstract:  奶牛的始配年龄一般为16~18月龄,正常情况下达到该年龄的青年奶牛大多数可出现正常发情周期,而且受孕率较经产奶牛高.但是,在生产实践中有少数已进入始配年龄的青年母牛长期不发情,严重影响奶牛场的繁殖效率和经济效益.笔者对年龄已超过18个月龄未发情的20头青年母牛,应用PMSG处理进行诱导发情试验,效果显著,现报道如下.
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