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运用地统计学对莲花湖库区红松水源涵养林表层土壤水分-物理性质进行了空间异质性分析。研究结果表明:土壤含水量、土壤密度、毛管孔隙度、非毛管孔隙度等因子均服从对数正态分布;毛管孔隙度最优拟合模型是球状模型,其它因子均为指数模型。土壤含水量、土壤密度、毛管孔隙度和非毛管孔隙度块金值、变程、结构比、分数维和空间自相关系数最大值分别为0.311、0.297、0.192、0.293,6.87 m、10.29 m、8.31 m、8.88 m,0.690、0.694、0.814、0.707,1.968、1.939、1.937、1.945,0.111、0.200、0.246、0.157。可见以上4个因子空间自相关性均较强,随着空间距离的增大,其相关性逐渐减弱。其中毛管孔隙度均一性程度较高;土壤含水量空间分布形态较复杂,破碎化程度高。
Spatial heterogeneity of surface soil moisture and physical properties of Pinus koraiensis forest in Lianhua Lake reservoir area was analyzed by geostatistics. The results showed that all the factors such as soil water content, soil density, capillary porosity and non-capillary porosity were all logarithmic normal distribution. The capillary porosity optimum fitting model was spherical model, and other factors were exponential model. The maximum values of soil water content, soil bulk density, capillary porosity and non-capillary porosity were 0.311,0.297,0.192,0.293,6.87 m, 10.29 m, 8.31 m, 8.88 m, 0.690, 0.694, 0.814, 0.707, 1.968, 1.939, 1.937, 1.945, 0.111, 0.200, 0.246, 0.157. It can be seen that the spatial autocorrelation of the above four factors is strong, with the spatial distance increasing, the correlation decreases gradually. The homogeneity of capillary porosity was higher. The spatial distribution of soil moisture content was more complex and the degree of fragmentation was higher.