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应用经典统计分析方法及地统计学方法对陇东旱塬厚覆盖黑垆土m:5×5,m:1×1网格的36个测点0～90cm(分9层)土壤水分的空间变异进行了研究。结果表明:(1)0～10,10～20及20～30cm各独立层土壤水分服从对数正态分布,其余各独立层及累积层(0～30,30～90,0～90cm)均服从于正态分布;(2)土壤水分空间变异具有结构性,可以用线性模型γ(h)=29.6762+3.6188h拟合半方差图;(3)在研究范围内取一个样点测定土壤水分含量即能达到一般精度要求;(4)点状Kringing法应用于土壤水分空间变异的研究,具有估测精度高、误差小的特点。
By using the method of classical statistical analysis and geostatistics, the spatial distribution of soil moisture in 0 ~ 90cm (9 layers) of 36 measuring points with m: 5 × 5 and m: Variants were studied. The results showed that: (1) The soil moisture in 0 ~ 10, 10 ~ 20 and 20 ~ 30cm layers obeyed the logarithm normal distribution, and the rest of the independent and cumulative layers (0 ~ 30,30 ~ 90,0 ~ 90cm) (2) The spatial variability of soil moisture is structural. The linear model γ (h) = 29.6762 + 3.6188h can be used to fit the semi-variogram. (3) A sample is taken within the scope of the study to determine the soil moisture Content can reach the general accuracy requirements; (4) Point-like Kringing method applied to the study of spatial variability of soil moisture has the characteristics of high estimation accuracy and small error.