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 Ministry of Water Resources;
Yangling 712100 (China);
Graduate University of the Chinese Academy of Sciences;
Beijing 100049 (China);
College of Resources and Environment;
Northwest A&F University;
Yangling 712100 (China);