1. Ph.D. Candidate, Centre for Agricultural Water Research in China, China Agricultural Univ., Beijing 100083, China.
2. Master Candidate, Centre for Agricultural Water Research in China, China Agricultural Univ., Beijing 100083, China.
3. Associate Professor, College of Water Conservancy, Yunnan Agricultural Univ., Kunming 650201, China.
4. Professor, Centre for Agricultural Water Research in China, China Agricultural Univ., Beijing 100083, China (corresponding author).