农田水分利用效率研究进展及调控途径

Research Progresses and Regulating Methods of Field Water Use Efficiency

农田水分利用效率是节水农业研究的关键指标。本文将农田水分利用效率分解为灌溉水利用率、降雨利用率和作物水分利用效率三个方面,分别论述其重要指标及其计算方法,构建农田水分利用效率的指标体系;同时,分别提出提高灌溉水利用率、降雨利用率和作物水分利用效率的措施,以提高整个农田生态系统内的用水有效性,为农业水资源的持续高效利用提供科学指导。

The field water use efficiency is a key indicator for the water-savlng agriculture research. It was divided into three aspects： irrigation water use coefficient, rain water use coefficient, and crop water use efficiency in this paper. These important indicators and calculating methods were respectively analyzed to set up an indicator system of the water use efficiency. The relevant regulating measurements for improving irrigation water use coefficient, rain water use coefficient, and crop water use efficiency were brought forward in order to realize efficient water use in the whole field ecosystem, which would provide scientific instruction for high efficient and sustainable use of agricultural water resources.