本文综合论述了与旱作农业生产有关的植物水分利用效率方面的研究成果,主要是旱作农业生产中,如水分利用效率在发展农业生产方面可能的应用。农作物水分利用效率的种间和品种间差异,以种间差异极为显著,一般相差达2—5倍,远大于品种间差异,这就为引种和选育高水分利用效率作物品种提供根据;环境因素及栽培措施对于用水效率的影响,大气因素以水分饱和亏缺和光照,土壤因素以有效含水量和矿质营养最为主要。研究资料为人工干预以提高用水效率,及农业观划、作物布局等提供了参考依据。 This paper summarizes the research results of plant water use efficiency related to dry farming agriculture, mainly in dry farming, such as the possible application of water use efficiency in the development of agricultural production. The differences among species and varieties of crop water use efficiency are very significant among the species, with the difference of 2-5 times, which is much larger than that of the varieties, which provides basis for the introduction and selection of crop varieties with high water use efficiency. Environment Factors and Cultivation Measures For the impact of water use efficiency, the atmospheric factors are water saturation deficit and light, and soil factors are the most important with effective water content and mineral nutrition. The research data provide reference for human intervention to improve water use efficiency, agricultural planning and crop layout.