【摘要】 以常规小畦平播为对照 ,探讨了春玉米田在不同覆盖条件下的耗水特征。试验结果表明 ,无论哪种覆盖种植方式 ,春玉米在不同生育阶段的耗水规律与不覆盖是一致的 ,秸秆覆盖和地膜覆盖可减少棵间土壤水分蒸发 ,总体耗水量有所减少。秸秆覆盖和地膜覆盖垄沟种植春玉米产量大幅度提高 ,地膜覆盖垄背种植在一定程度上保蓄土壤水分 ,但由于垄背较高 ,土壤水分供应不足 ,较不覆盖减产显著。因此 ,秸秆覆盖和地膜覆盖垄沟种植是提高作物对降水的利用率及水分利用效率的主要途径之一更多还原

【Abstract】 With conventional cultivation model as comparison, water consumption characteristics of spring maize under different mulching patterns were studied. The results show that water consumption law of various kinds of mulching patterns is in correspondance with that without mulching. The straw mulching and plastic film mulching, on some degree, can both reduce the water evaporation from soil surface and reduce the total water consumption, too, but it is not obvious. The straw mulching and plastic film mulching with seeding in furrow can improve water use efficiency, in this sense, mulching is water saving. Although the plastic film mulching with seeding in ridge can maintain soil water, the soil water supply of ridge is so little that the yield forming is greatly influenced,so it is not adaptable to the local conditions.更多还原