关键词: 空间格局, 辽东栎, 间伐强度, 生殖构件

Abstract: Based on field survey and laboratory analysis, we studied soil water infiltration and its influence factors in wasteland, grassland, bushwood, and forestshrub land on typical karst hill slopes in Guohua, Pinguo, Guangxi. The results showed that no significant difference in initial infiltration rate was found among wasteland, grassland, and bushwood, but their initial infiltration rates were obviously lower than that in the forest-shrub land. The initial and steady infiltration rates in the study area were very low (<1 mm·min^-1), and decreased gradually with the increase of soil depth. The permeability coefficient and cumulative water seepage did not differ in wasteland, grassland and bushwood, and decreased with the increase of soil depth, but they were obviously lower than those in the forest-shrub land. The steady infiltration rate and permeability coefficient were significantly negatively correlated with soil depth, soil bulk density, clay content and initial water content, while significantly positively correlated with soil organic carbon content, non-capillary porosity, silt proportion and water temperature. Soil non-capillary porosity and clay content (<0.002 mm) were the major factors influencing soil water infiltration ability.

Key words: spatial pattern, Quercus liaotungensis, thinning intensity, reproductive module