地膜覆盖条件下土壤水及溶质运移规律的室内试验研究

针对黄淮海地区大面积种植棉花并采用地膜覆盖这一现状，采用室内模拟试验法，研究了地膜覆盖后土壤剖面上的水盐运移特点和规律．研究结果表明，在盐碱地上采用地膜覆盖，一方面可以减少土壤水分的蒸发，提高表层土壤的湿度；一方面由于通过土壤表层蒸发的水分减少，土壤中的盐分的表聚作用大为减弱，抑制了土壤返盐过程．

Laboratory Research on Soil Moisture and Solute Movement Laws Under Plastic Sheet Covered

When saline soil is covered by film, the soil evaporation capacity could be reduced, the moisture of the surface soil increased, and as results of the evaporation capacity decreasing, the salt cumulating in surface soil can be reduction, so the accumulation of salt in the soil surface is controlled.Because the soil moisture in deep layers can not be evaporated through the surface soil, the salt soil water don 't else move up with watet. It is very helpful for reclamation of salt affected soils.