Affiliation: | 1. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, P. R. China;2. College of Natural Resources and Environment, Northwest A&F University, Yangling, P. R. China;3. Key Laboratory of Plant Nutrition and the Agri‐environment in Northwest China, Ministry of Agriculture, Yangling, P. R. China;4. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, P. R. China |