关键词: 聚类分析, 聚类分析

Abstract: Soil infiltration depends on many internal and external factors, and is closely correlated with vegetation types, soil characteristics. In order to determine the effects of re-vegetation models to soil infiltration, the author used bare land as a control and measured soil initial infiltration, stable infiltration, average infiltration and accumulative water quantity as soil infiltration capability, and determined the relationship between soil infiltration capability and soil physical properties under 5 re-vegetation models. The results showed that: (1) the infiltration capability of 4 re-vegetation models was higher than that of bare land, the order of soil infiltration capability from high to low was: Liquidamdar formosana×Melia azedarach＞Vitex negundo var. cannabifolia×Robinia pseudoacacia＞Lagerstroemia indica×Abelia chinensis＞Comm. Setaria viridis×Cynodon dactylon＞the bare land, and the relationship among the soil initial infiltration, stable infiltration, average infiltration and accumulative water quantity match the equlity: α=0.4865α1+0.4982α2+0.5123α3+0.5202α4 (αi was the standard data of the index); (2) The fitting effect of Horton infiltration model on soil infiltration process in each plot was good (R2≥0.775), which had good applicability; (3) Correlation analysis showed: there were significant or very significant positive relationship between soil infiltration and ＞2 mm and 2-0.25 mm soil percentage, capillary porosity and non-capillary porosity percentage, saturd electricity, and there were significant or very significant negative relationship between soil infiltration and bulk density and there were no significant or very significant negative relationship between soil infiltration and soil deep, ＜0.25 mm soil percentage. +0.5202 （ was the standard data of the index）; (2)The fitting effect of Horton infiltration model on soil infiltration process in each plot was good(R2≥0.775),which had good applicability;(3)Correlation analysis showed:There were significant or very significant positive relationship between soil infiltration and ＞2mm and 2—0.25mm soil percentage, capillary porosity and non—capillary porosity percentage,saturd electricity,and there were significant or very significant negetive relationship between soil infiltration and bulk density and there were no significant or very significant negetive relationship between soil infiltration and soil deep, ＜0.25mm soil percentage.