畜牧与饲料科学 ›› 2009, Vol. 30 ›› Issue (6): 17-17.doi: 10.12160/j.issn.1672-5190.2009.06.007
田燕[1] 孙婷婷[1] 马军成[1] 沈蓉[2]
TIAN Yan, SUN Ting-ting, MA Jun-cheng, SHEN Rong (1.Institute of Geography, Henan Academy of Sciences, Zhengzhou 450052,China;2.Zhongyuan Petroleum Exploration Bureau, Puyang 457001,China)