土壤水盐运行规律的研究,特别是水盐上升运行,对于防治土壤盐漬化具有极重要的意义。土壤水盐上升运行受到土壤的质地、结构、蒸发、地下水以及土壤湿度、温度和盐分浓度三种梯度的影响。华北平原的土壤不仅在质地上有水平分布和剖面层次的差异,而且土壤类型和盐漬化程度也各有不同,自然和人为因素也很复杂。因此土壤盐渍化的防 Research on the law of operation of soil water and salt, especially the rise of water and salt, is very important for the prevention and control of soil salinization. The run-up of soil water and salt is affected by three gradients of soil texture, structure, evaporation, groundwater and soil moisture, temperature and salt concentration. The soil in the North China Plain not only has the horizontal distribution and the profile level difference in the texture, but also has different soil types and salinities, and the natural and man-made factors are also complex. Therefore, the prevention of soil salinization