State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau;
Institute of Soil and Water Conservation;
Chinese Academy of Sciences and Northwest A&F University;
Yangling;
Shaanxi 712100 (China);
Institute of Geographic Sciences and Natural Resources Research;
Chinese Academy of Sciences;
Beijing 100101 (China);
College of Life Sciences;
Northwest A&F University;
Yangling;
Shaanxi 712100 (China);