鸡呼吸道病毒性疾病的发生及防治
China Animal Health（2010）
Abstract
<正>近年来鸡的饲养量、存栏量显著增加,而鸡的饲养技术水平普遍偏差。小型种鸡场数量猛增,制定的商品代鸡苗防疫程序普遍存在混乱和不够科学的现象;外界环境因素如气候异常、干燥、多风、
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