关键词: 土壤水盐动态, 华北平原, 洼地, 地下水矿化度, 积盐, 衡水地区, 盐渍化土壤, 毛管水, 地下水位, 底土

Abstract: 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.