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森林土壤的结构特征具有重要的水文生态功能,能影响土壤的水分物理性质和抗蚀性。于2002年5月用环刀和铝盒采集了位于长江上游支流大渡河水源地的贡嘎山东坡亚高山针叶林不同林型土壤表层(0-10cm)原状土样,室内常规方法测定容重、含水量、孔隙度、稳渗率、团聚体组成和颗粒组成,研究土壤团聚特征及其生态环境效应。结果如下:混交成熟林土壤结构性最好,水文生态功能最强;林木皆伐后最差;其他林型界于其间。研究结果对长江上游生态环境建设具有一定指导意义。图1表2参10。
The structural characteristics of forest soil have important hydrological and ecological functions, which can affect the physical properties and corrosion resistance of soil. In May 2002, a ring knife and an aluminum box were used to collect the undisturbed soil samples (0-10cm) from different forest types of subalpine coniferous forests on the east slope of Gongga Mountain on the upper reaches of the Yangtze River. The indoor method was used to determine the bulk density , Water content, porosity, steady infiltration rate, aggregate composition and particle composition, the study of the characteristics of soil aggregation and its ecological and environmental effects. The results are as follows: The soil structure of the mature mixed forest is the best, and the hydrological and ecological functions are the strongest; the trees are the worst after clearing; the others are in the meantime. The research results have certain guiding significance to the ecological environment construction in the upper reaches of the Yangtze River. Figure 1 Table 2 Reference 10.