以丹江口库区五龙池小流域为研究区域,利用双向指示种法将观测期(2008年4—10月)划分为不同干湿时段;运用前向选择法和Monte Carlo检验法对显著影响不同时段土壤水分空间格局的环境因子进行筛选;利用冗余分析排序法分析不同时段土壤水分格局与环境因子的关系;运用偏冗余分析定量分离环境、空间及其交互作用对土壤水分变异的影响.结果表明:观测期土壤水分被划分为7个子类,分别属于干旱、半干旱、半湿润和湿润4个时段;在干旱期,土地利用类型是影响土壤水分空间格局的主控因子,土层厚度、相对高程、剖面曲率、土壤容重和土壤有机质的影响也达到显著水平;在半干旱期,土层厚度起主导作用,土地利用类型、地形湿度指数、土壤容重和剖面曲率显著影响土壤水分;在半湿润期,地形湿度指数的影响最大,土地利用、坡向正弦值的作用显著;在湿润期,地形湿度指数和坡向正弦值是主要影响因子,相对高程、汇水面积的影响显著.不同干湿期土壤水分的空间分布与环境空间的生态梯度格局吻合较好.从干旱期到湿润期,环境因子独立作用不断减小,但始终处于主导地位,空间位置独立作用总体变化不大且一直维持在较低水平,环境-空间位置交互作用的贡献逐渐增大. Taking Wulongchi small watershed of Danjiangkou Reservoir Area as the research area, the observation period (April-October 2008) was divided into different wet-dry periods by using the two-way indicator planting method. The significant differences were noticed by using forward selection method and Monte Carlo test Environmental factors of spatial pattern of soil moisture were screened. The relationship between the soil moisture pattern and environmental factors in different periods was analyzed by redundancy analysis and rank order. Partial redundancy analysis was used to quantitatively analyze the influence of environment, space and its interaction on soil moisture. The results showed that the soil moisture in the observation period was divided into seven sub-categories, belonging to four periods: arid, semi-arid, sub-humid and humid. During the drought period, the land use types were the main controlling factors affecting the spatial pattern of soil moisture. , Relative height, section curvature, soil bulk density and soil organic matter also reached significant levels. During the semi-arid period, soil thickness played a dominant role. Soil types were significantly affected by land use type, topography humidity index, soil bulk density and profile curvature. Semi-humid period, topography humidity index has the greatest impact, land use, slope to the role of sine significant; in the wet period, the topography Moisture index and slope sine are the main influencing factors, relative elevation and catchment area are significant.The spatial distribution of soil moisture in different dry and wet periods is in good agreement with the ecological gradient pattern in the environmental space.From the dry period to the wetting period, the environment The independent function of factor decreases continuously, but it always takes the leading position. The independent effect of spatial position has little change and has been kept at a low level, and the contribution of the interaction between environment and space gradually increases.