【摘要】 农业节水的核心问题是提高水分利用率和水分利用效率。重点阐述了提高田间水平的水分利用率和水分利用效率的有关理论。特别从叶片水平、群体水平、产量水平 3个不同层次详细论述了作物水分利用效率与环境因子关系的理论 ,以及从理论出发得出的提高不同层次作物水分利用效率的可能途径。强调农业节水的科学基础是一个涉及多学科的综合理论体系 ,农业节水的措施也应该是建立在这一综合理论体系上的综合技术体系。最后 ,对为加强农业节水科学基础而应进一步强化的研究方向提出了几点建议更多还原

【Abstract】 The key point of agricultural water saving is to increase the water use efficiency of crops and the ratio of water use during transportation and application. This paper discusses the theory of water use efficiency and its relationship with environmental factors at the levels of leaf, canopy, and yield from the theoretical point of view, and the possible ways of increasing water use efficiency according to the theory . It is emphasized that the fundamentals of agricultural water saving as well as the corresponding technology involves an integrated theoretical system of multiple disciplines. At last, some proposals are made for the strengthening of agricultural water saving research and technology development.更多还原