1. National Key Laboratory for Efficient Utilization of Agricultural Water Resources, China Agricultural University, Beijing 100083, China
2. Chinese-Israeli International Center for Research and Training in Agriculture, College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China
3. Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
4. Science and Technology Promotion Centre Ministry of Water Resources. P.R.C., Beijing 100038, China