滨海平原农田土壤含盐量空间变异分析

以江苏省射阳县为例，对该县节水灌溉条件下农田土壤含盐量，地下水含盐量进行取样检测，应用地质统计学方法对所取得的数据进行理论分析，结果表明：该地区土壤含盐量服从正态分布，半变差函数符合五次球状函数，地下水含一服从对数正态分布，半变差函数符合三次球状函数，利用GSLIB软件，绘制了该县土壤含盐量和地下水含盐量等值线图，为该地区水土管理，防止土壤盐渍化提供了决策依据。

Spatial variability analysis of soil salinity for Binhai Plain

Geostatistics is applied to the theoretical analysis of sampling data of salt contents of soil and groundwater in Sheyang County, Jiangsu Province. The results show that the soil salinity obeys the normal distribution and its semi-variogram is a penta-spherical function, and that the groundwater salinity obeys the log-normal distribution and its semi-variogram is a cubic-spherical function. By use of GSLIB software, a contour map is drawn, which can be used for irrigation management and prevention of salinization of soil.