冻融及雪水入渗作用下土壤水盐运移特征研究

Research on Feature of Soil Salt-moisture Transfer Under Freeze-thawing and Melting Snow Infiltration Conditions

针对北疆冻融及雪水入渗作用下土壤水盐运移特征进行了监测。结果表明，越冬期各土层水盐随时间呈中等变异特征，盐分变异系数较含水率变异系数大，且含水率变异系数随深度的增加而减小。研究发现，雪水入渗能在一定程度上补给土壤水，尤其对0~60 cm 土层水盐分布影响较大，在消融期后期，这一土体是造成春季土壤次生盐渍化最危险的区域。

The objective of this experiment is to study the movement feature of soil moisture and salt un-der freeze-thawing condition.The result indicated that the soil moisture and salt showed moderate variabili-ty,salt coefficient of variation is greater than that of soil moisture,and moisture coefficient of variation de-creased with increasing depth;Film can improve the soil moisture and temperature environment to some extent.Melting snow infiltration can supply the soil moisture in some extent,especially had greater effect on distribution of soil moisture and salt in the layer of 0-60 cm,in melting period,this layer is the most danger soil.So soil moisture observation before the sowing period is very necessary,this experiment will provide theoretical basis for the former to develop the irrigation system.