Animal Husbandry and Feed Science ›› 2009, Vol. 30 ›› Issue (10): 174-174.doi: 10.12160/j.issn.1672-5190.2009.10.089
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ZHAO Ping, ZHAO Gong-qiang, MA Li (1.Grassland Work Station of Ningxia, Yinchuan 750001, China; 2. Information Institute of Science and Technology of Ningxia, Yinchuan 750001, China)