原生盐碱荒地的盐分积累与运移特性

基于中国北方地区原生盐碱荒地盐分年内跟踪监测数据，探讨了试验区自然条件下原状盐碱荒地盐分的积累与运移特性。试验结果表明：自然条件下原生盐碱荒地的表层土壤积盐量是有限的；地表以下非饱和带土壤盐分的积累与运移可划分为3区域，剧烈变化区、存储调节区和盐分传导区；剧烈变化区的盐分质量分数受降雨和蒸发的影响而剧烈波动，存储调节区用于存储和调节上下层波动的水盐，盐分传导区由于其水力传导度大使得盐分难以累积而质量分数保持稳定。

Investigation of salinity accumulating and its movement characters in original saline wasteland

Based on the tracking and monitoring data of the salinity in original saline wasteland in north China during two years, the salinity accumulation and its movement characters under natural conditions in original saline wasteland were investigated. The experimental results showed that the amount of topsoil salinity accumulating under natural conditions in original saline wasteland is limited. The soil salinity accumulating and moving of unsaturated belt beneath the surface can be separated into three regions, the severe change region, the storage adjustment region and saline conducting region. The salt content in the severe change region fluctuates acutely because of rainfall and evaporation, the water and salt waved in the upper and lower layer are stored and adjusted in the storage adjustment region, and the salinity can hardly be accumulated in layer but keeps stably in the saline conducting region owing to great hydraulic conductivity.