通过温室盐渍土壤中的种植试验,对常规灌溉、固定灌溉、交替灌溉3种灌水方式下水分、盐分、温度的变化情况进行了研究。结果表明,交替灌溉水分利用效率优于常规灌溉和固定灌溉;相同时间内交替灌溉的干燥沟升温幅度大于湿润沟,随着土壤深度的增加温度呈逐渐减小的趋势;常规灌溉土壤返盐最多,固定灌溉返盐最少。土壤水溶性盐、Cl-、Na+在土壤表层积聚现象明显。
In the method of greenhouse cultivating,the corn growth and change of water,salt and temperature were studied in saline soil under normal irrigation,fixed irrigation and alternate irrigation.The results showed: in the course of corn growth,water use efficiency of alternate irrigation corn was the best in 3 irrigation methods.Temperature of dryness furrow was ascended more than wetness furrow in same time.Soil temperature was more and more low with the increasing of soil depth.The soil water-solubility salt content of normal irrigation was highest and the soil salt content of fixed irrigation was lowest.Soil water-solubility salt,Cl-and Na+ were accumulated in soil surface layer visibly.