No Significant Changes in Topsoil Carbon in the Grasslands of Northern China Between the 1980s and 2000s

Shangshi Liu1, Yuanhe Yang1, Haihua Shen1, Huifeng Hu2, Xia Zhao1, He Li1, Taoyu Liu1 and Jingyun Fang1, (1)IB Institute of Botany, Chinese Academy of Sciences, Beijing, China, (2)Institute of Botany, Chinese Academy of Sciences, Beijing, China