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运用经典统计学和地统计学相结合的方法,研究浙江温岭海涂围垦区在3种取样尺度下(1800 m×800 m、600 m×420 m和300 m×300 m)土壤盐分的空间变异性。结果表明:3种取样尺度下土壤盐分服从对数正态分布,属中等变异强度;半方差函数模型均符合指数模型,具有强的空间自相关性。Moran′sⅠ系数表明小尺度(S)下土壤盐分的空间相关性较弱,而中(M)和大尺度(L)下则较高。Kriging插值与相关性分析能直观的表现研究区内土壤盐分含量的空间分布状况和变化情况。通过海涂围垦区3种取样尺度下的空间异质性的分析,揭示出土壤盐分的空间变化规律,为围垦区盐渍化分区管理与改良利用提供了理论基础和实践依据。
The spatial variability of soil salinity under the three sampling scales (1800 m × 800 m, 600 m × 420 m and 300 m × 300 m) was studied by using the combination of classical statistics and geo-statistics. . The results showed that the soil salinity obeyed the logarithm normal distribution under three sampling scales, and was a moderate variation intensity. The semivariance function models all fit the exponential model and had strong spatial autocorrelation. The Moran’sⅠcoefficient showed that the spatial correlation of soil salinity was weak at small scale (S) and higher at medium (M) and large scale (L). Kriging interpolation and correlation analysis can intuitively show the spatial distribution and change of soil salinity content in the study area. The spatial heterogeneity of soil salinity was revealed through the analysis of the spatial heterogeneity at three sampling scales in the reclamation area of the Tainsu. The results provided theoretical and practical evidences for the management and improvement of the salinization of the reclamation area.