中文摘要：

利用地统计学和联合多重分形法，分析了杨凌一级阶地和三级阶地稳定入渗率和120min累积入渗量的空间变异性，以及多尺度上120min累积入渗量与土壤各理化特性的相关关系。结果表明，一级阶地，稳定入渗率和120min累积入渗量的空间异质比分别为0．175和0．245，120min累积入渗量与土壤初始含水率、土壤密度和粗粉粒的多尺度相关程度较高。三级阶地，稳定入渗率和120min累积入渗量的空间异质比分别为0．243和0．288，120min累积入渗量与土壤密度的相关系数为-0．773，与其余各土壤特性之间的多尺度相关程度较弱。不同质地土壤的稳定入渗率在单一尺度上的空间变异性不同。

英文摘要：

Through the methods of geostatistics and joint multifractal, the spatial variability of steady infiltration rate and 120 min cumulative infiltration, and the multi-scale correlation between 120 rain cumulative infiltration and the various soil properties in first terraces and third terraces in Yangling were analyzed. The results showed that in first terrace, spatial heterogeneity ratios of the steady infiltration rate to 120 min cumulative infiltration were 0. 175 and 0.245 respectively, and the correlation coefficients between 120 rain cumulative infiltration and initial soil water content, bulk density and the coarse silt content were all high. In third terrace, the spatial heterogeneity ratios of the steady infiltration rate to 120 min cumulative infiltration were 0. 243 and 0. 288 respectively, the correlation coefficient of 120 min cumulative infil- tration and bulk density was -0. 773, and the degree of multi-scale correlations between 120 min cumulative infiltration and the rest of soil properties were all weak. The different soil textures might cause the different spatial variability of steady infiltration rate on a single scale.