Animal Husbandry and Feed Science ›› 2009, Vol. 30 ›› Issue (9): 165-165.doi: 10.12160/j.issn.1672-5190.2009.09.080
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NIU Hua-xing, LI Ying-mei,YIN Xu-sheng , DU Ye-liang, LI Shu-hua (1.Institute of Veterinary Drug Control of Shandong Province, Ji' nan 250022, China; 2.College of Animal Science and Technology, Qingdao Agriculture University, Qingdao 266109,China; 3.Central Station of Animal Husbandry of Shandong Province, Ji' nan 250022, China)