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nai niu tai yi bu xia de bing yin fen xi ji fang zhi cuo shi
Author(s): 
Pages: 27-28
Year: Issue:  11
Journal: Agricultural Technology & Equipment

Abstract:  奶牛胎衣不下是指奶牛在产后12~24h内胎衣不能自然完全脱落者,它是奶牛的常见病之一.我国有关资料显示,在一般奶牛场中,此病的发病率为10%~15%,有些地区高达30%.2008年以来,大同市南郊区发病率平均为7.8%.
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