华北平原是我国重要的粮棉生产基地。但是,有些地区由于旱、涝、盐碱的危害,严重影响农业生产的发展和人民生活水平的提高,因此,研究土壤的水盐运行规律,提出有效控制旱、涝、盐碱灾害的措施,为本区的一个重要生产课题。 华北平原盐分的迁移,与国内外一般干旱地区不同。

According to the water condition, form characteristics and the dynamic type ofthe salt in the soil, the dynamic type of the water-salt may be classified into six types:1. The dynamic type of the water-salt moistened by leaching;2. The dynamic type of the water-salt moistened by the film water and capillarywater;3. The dynamic type of the water-salt moistened by the substratum capillary water;4. The dynamic type of the water-salt moistened periodically by the capillarywater;5. The dynamic type of water-salt moistened by the support capillary water;6. The dynamic type of the water-salt moistened by the saturated capillary water.The seasonal change of salt accumulation of soil surface has a particular characterin this region. In general, the condition of the water-salt in the soil not only deter-mines the period and extent of the accumulation but also determines the effectivenessof salt washing It may control the seasonal process of the accumulation.According to the correlation analysis, it reveals that there is a good correlationbetween the degree of mineralization of ground water and salt content inthe substratum.