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为深入研究土管的空间分布对土壤水分运动的影响 ,该研究在长江三峡花岗岩坡面选择了一受人为活动影响较小的天然次生马尾松林地作为试验场地 ,开挖土壤剖面 ,观测并研究了其土管空间分布特性 .研究结果表明土管主要分布在距地表以下 0 8～ 1 0m范围内 ,经Iδ 指数检验其分布类型为聚集分布型 .据调查并推断其土管成因主要为土壤形成作用和动物活动或植物根系腐烂后形成的根孔所致
In order to further study the influence of spatial distribution of soil pipe on soil moisture movement, this study selected a natural secondary Masson pine forest land which is less affected by human activities as the test site on the granite slope of the Three Gorges of the Yangtze River, excavation of soil profile, observation and study The results showed that soil pipes were mainly distributed in the range of 0 8 ~ 10 m away from the surface and the distribution type was aggregated distribution by the Iδ index.According to the survey and the conclusion that the main causes of soil pipes are soil formation and Roots caused by animal activity or decay of plant roots