Animal Husbandry and Feed Science ›› 2010, Vol. 31 ›› Issue (3): 35-35.doi: 10.12160/j.issn.1672-5190.2010.03.015
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ZHAO Zhen-guo,DUAN Xiao-wei (1.College of Veterinary Medicine,Northwest A&F University,Yangling 712100,China;2.Yangling Branch of Agriculture and Animal Husbandry Co.,Ltd.of Shaanxi Shiyang (Group) Co.,Ltd.,Yangling 712100,China;3.Animal Health Monitoring Institution of Lintong District of Xi'an City,Lintong 710600,China)