土壤盐渍化的监测和预报研究

本文采用田间观测和数值模拟相结合的方法，对改造后的重盐碱试验地的水盐动态连续三年进行了监测和预报研究。在田间，监测了地下水的水位和矿化度、土壤盐分和水分、降雨和农田蒸散量等参数，同时针对现场试验条件进行数值模拟。在土壤盐分输运模型中，考虑动水不动水概念和吸附作用，在解水分运动方程时采用了更合理的改进型Ｐｉｃａｒｄ迭代差分法。研究表明，在当前的自然因素和农耕活动中，试验地土壤中的盐分达到动态平衡，不

MONITORING AND PREDICTING INVESTIGATION ON SOIL SALINISATION

Monitoring and predicting technology was studied in the present work. Water and salt movement history in a reclaimed salt soil was obtained by using the method combining field observation with numerical simulation. At the field site, monitored parameters include groundwater table and mineralization, soil salt and water content as well a sevapotranspiration. The numerical simulation was employed for the field conditions. In the work, mobile-immobile water concepts and absorption were taken into account. The results indicated that under the present natural and cultural conditions, soil salt in the test field can be kept balanc dynamically, so that the revival of soil salinization can be avoided.