国家高技术研究发展计划项目2011AA100502;国家自然科学基金项目51009140;中央级科研院所基本科研业务费专项中国农业科学院农田灌溉研究所资助 This work was supported by the National High-Tech Project of China2011AA100502;the National Natural Science Foundation of China51009140;the Central Public-interest Scientific Institution Basal Research Fund