【摘要】 渗水地膜覆盖是一项新的农艺技术,其保墒性可有效地控制地表蒸发从而抑制土壤盐分表聚,其单向渗水性可在一定程度上控制土壤水分运移从而控制土壤盐分累积。本试验在朔州市应县原生盐碱荒地区,设覆盖渗水地膜、覆盖普通地膜和不覆盖三种处理方式,跟踪观测2007年10月19日到2008年10月30日不同覆盖措施条件下原生盐碱荒地的土壤盐分分布状况。结果表明:渗水地膜具有更为明显地抑制盐分表聚的作用,土壤剖面的盐分变化量和透过地膜进入土壤中的水量存在负相关关系,可利用渗水地膜来控制土壤盐分累积,基于透过地膜的水量叠加可以逐步减小土壤剖面的总含盐量,进而达到逐步淋洗脱盐的效果。更多还原

【Abstract】 The water-permeable plastic film is a new agricultural technique,its moisture conservation role can control effectively the soil surface moisture evaporation to restrain top enrichment of soil salt,and its unidirectional permeability can control partly the soil moisture migration to dominate soil salt accumulation.The following observation experiments of soil salinity are devised in the original salinization wasteland under different covering measures,such as covering with water-permeable plastic film,covering with common film and no covering.The results indicate that the water-permeable plastic film can be used to restrain more obviously top enrichment of soil salt,and there is a negative relationship between salinity variation of soil profile and soil moisture of permeative film.So,the water-permeability plastic film can be used for controlling soil salinity accumulation,at the same,the moisture superposition of permeative film can decrease step by step the total saltness of soil profile,then that can realize the saline-alkali soil desalinating step by step.更多还原