The impacts of human disturbances on soil carbon density and ecosystem storage of carbon of typical steppes
XU Zhong-qi, LI Wen-hua, XU Qing, MIN Qing-wen, WANG Ying-shun, WU Xue-bin
JOURNAL OF NATURAL RESOURCES . 2009, (4): 621 -629 .  DOI: 10.11849/zrzyxb.2009.04.008