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。它的明显的季节性变化,尤其是 North China Plain is an important grain and cotton production base in China. However, in some areas, due to drought, waterlogging and salinization, the development of agricultural production and the improvement of people’s living standard are seriously affected. Therefore, the law of water and salt movement in soil is studied and the measures to effectively control the drought, waterlogging and saline-alkali disasters are put forward. This area is an important production issue. The migration of salt in the North China Plain is different from the general arid areas at home and abroad. Its obvious seasonal changes, especially