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通过对桂西北喀斯特峰从洼地坡面不同立地类型和土地利用构型的土壤水分特征进行定位观测研究,分析了土壤水分的空间异质性及其与土地利用方式及结构之间的关系。结果表明,喀斯特峰从洼地坡面土壤水分随土层加深,均值升高,空间异质性(变异系数)却有所减小,土壤水分的均值和空间异质性随着时间(降雨)也表现出一定的变化规律;方差分析和多重比较表明,土地利用方式对土壤水分的空间异质性具有显著的影响,次生林和灌丛地土壤水分含量较高,经济林地各土层和观测时段土壤含水量都显著低于其他土地利用方式;通过分析研究区3种主要的土地利用结构对坡面土壤水分的影响,提出调整土地利用结构和布局能有效提高土壤含水量。
Through the observation of the soil moisture characteristics of different site types and land use configurations in the depression of karst landform in the northwest of Guangxi, the spatial heterogeneity of soil moisture and its relationship with land use patterns and structure were analyzed. The results showed that the mean and spatial heterogeneity of soil water content decreased as time went by (rainfall) as the karst peak deepened with the soil depth from the depression surface and the mean value increased. The analysis of variance and multiple comparisons showed that the land use pattern had a significant effect on the spatial heterogeneity of soil moisture, the soil moisture content of secondary forest and shrub land was higher, The water content is significantly lower than other land use patterns. By analyzing the impact of three main land use structures on the soil moisture on the slope, it is suggested that adjusting the land use structure and layout can effectively improve the soil moisture content.