Animal Husbandry and Feed Science ›› 2011, Vol. 32 ›› Issue (2): 39-39.doi: 10.12160/j.issn.1672-5190.2011.02.019
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JIA Qing-hui, ZHANG Xiang-zhai, ZHANG Yan-ying (College of Animal Science and Technology, Hebei Normal University of Science & Technology, Changli 066600, China)