Animal Husbandry and Feed Science ›› 2017, Vol. 38 ›› Issue (7): 76-76.doi: 10.12160/j.issn.1672-5190.2017.07.027
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YAN Shu-hai1,ZHENG Yu-hua2 ( 1.Institute of Flowers,Weifang Engineering Vocational College, Qingzhou 262500,China;2.Institute of Architectural Engineering, Weifang University of Science and Technology, Shouguang 262700, China)