1. Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan
2. Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water-saving, Center for Agricultural Resources Research
3. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang 050021, China
4. University of Chinese Academy of Sciences, Beijing 100049, China
5. Department of Agroecology, Aarhus University, Tjele 8830, Denmark
6. Sino-Danish Center for Education and Research, Beijing 100190, China
7. Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan
8. Soil and Water Conservation Monitoring Station, Aler Water Conservancy Bureau, Aler 843300, China