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应用空间自相关函数、变异函数和分数布朗运动研究了四川雅安黄壤耕层的重量含水量、容重、粘粒含量、pH、有效磷含量和有效钾含量的空间分布特征。结果表明 ,黄壤耕层这 6项性质的空间自相关特性和变异性都较明显。它们的自相关范围与变程基本相当 ,介于 3 0～ 60m之间。分数布朗运动的无标度区间位于自相关范围或变程中。这 6项土壤性质的分形维数为 2 3 895～ 2 885 3 ,空间分布特征为pH均一性程度最好 ,空间变异最小 ;有效钾的均一性程度最差 ,空间变异最大 ;其余 4项性质介于前二者之间。
The spatial distribution characteristics of weight moisture content, bulk density, clay content, pH, available phosphorus content and available potassium content were studied by using the spatial autocorrelation function, the variation function and the fractional Brownian motion. The results show that the spatial autocorrelation characteristics and variability of the six properties in yellow soil are obvious. Their autocorrelation range and the range is basically equivalent, between 30 ~ 60m. Fractional Brownian scale-free intervals are in the autocorrelation range or range. The fractal dimension of the six soil properties was 2 3895 ~ 28853. The spatial distribution was characterized by the best pH homogeneity and the least spatial variability; the lowest homogeneity of available potassium and the largest spatial variability; the other four properties Between the first two.