交替隔沟灌溉提高农田水分利用效率的节水机理

Water saving mechanism for promoting water use efficiency by using alternate furrow irrigation techniques

综合国内外多学科研究成果 ,从田间储水效率、土壤储水与根系吸水间的转化效率、作物叶片气孔行为和光合产物在作物不同器官之间的运转等方面 ,论述了交替隔沟灌溉提高农田水分利用效率的节水机理 .结果认为 ,采用交替隔沟灌溉技术 ,棵间蒸发明显减少 ,作物叶片的气孔行为得到了优化 ,蒸腾速率降低 ,而植株的光合作用没有受到明显影响 。

Based on the research finds at home and abroad,the water saving mechanism to promote water use efficiency by using alternate furrow irrigation technique was discussed in the aspects of field water storing efficiency,the efficiency of sol water storage changing into water absorbed by root system,the leaf stomatal behavior,the transformation of photosynthetic output among the different crop organs,etc.It is shown that alternate furrow irrigation technique obviously reduces the inter\|row evaporation,optimizes the stomatal behavior,decreases the crop transpiration and influences the photosynthesis unremarkably so as to elevate the crop water use efficiency greatly.