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综合国内外多学科的研究成果,从地表水向土壤水的转化效率、农田水分的有效性、植物冠层结构、灌溉用水量和作物产量等方面,论述了间套作提高农田水分利用效率的节水机理.结果表明:间套作能够促进植物根系对农田水分的充分利用,有利于增加根层土壤的贮水量;间套作一方面减小棵间蒸发、抑制无效蒸腾,另一方面优化作物系统的源-库关系,创造出有利于植物生长发育的小气候,为资源在时间和空间上的集约利用和高产打好基础,在不增加农田灌溉水的同时大幅度提高单位面积产量,促进作物水分利用效率明显提高.
Based on the multidisciplinary research results both at home and abroad, the efficiency of farmland water conversion from surface water to soil water, the effectiveness of farmland water, plant canopy structure, irrigation water consumption and crop yield are discussed. Water saving mechanism.The results showed that intercropping can promote the plant roots to fully utilize the water in the farmland and increase the water storage capacity in the root soil.The intercropping can reduce the evaporation between the trees and restrain the inefficient transpiration and optimize Crop system to create a microclimate that is conducive to plant growth and development, lay the foundation for the intensive use of resources in time and space, and increase production yield per unit area without increasing farmland irrigation water, and promote The water use efficiency of crops has obviously increased.