中甸牦牛程序化人工授精技术应用的必要性分析
Contemporary Animal Husbandry（2017）
Abstract
中甸牦牛由于长期自繁自养、近亲繁殖,造成品种退化,生产性能低下,笔者在此介绍引进优良牦牛冻精,开展程序化人工授精的必要性.
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