微咸水入渗条件下碱土和盐土水盐运移特征分析

Analysis Water and Salt Transport Characteristic of Irrigation with Saline Water on Alkaline and Saline Soil

通过微咸水入渗实验结果和入渗模型分析实验资料方法研究了碱土、盐土在微咸水入渗条件下土壤水盐运移特性。结果表明:当矿化度在一定范围,相同入渗时间内两种土壤的累积入渗量、湿润锋随入渗水矿化度的增加而增加;不同SAR的微咸水入渗对盐土、碱土入渗能力影响不大,特别是盐土。碱土的水分和盐分运移与入渗水矿化度均呈正相关关系,盐土则不然。

The alkaline and saline soil was investigated. According to the infiltration experiment results and analysis experiment data by infiltration model, we studied the soil water and salt transport characteristic on the condition of infiltration with saline water on alkaline and saline soil. The results show that when the concentration in given area, cumulative infiltration, wetting front of soils increased with the concentration solution ; the distinction of infiltration ability of alkaline and saline soil is small when the value of SAR is different, especially saline soil. The water and salt transport of alkaline soil positively related with the concentration of infiltration solution, but the saline soil was not the case.