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为了探讨我国若干地区森林土壤对酸雨的缓冲能力,本文在对我国几个典型森林地带的土壤样品进行矿物分离富集等基础上用x射线粉末衍射法进行矿物学研究;本实验采用丙酮-二碘甲烷量液体系对土壤中的细砂级矿物进行密度梯度分级处理,同时对土壤中的淤泥样品进行严格的分选,集中<2μm的粘粒,而后分别作矿物分析鉴定;根据其结果,对各地区森林土壤中的细砂及粘土矿物组成作了比较,并对这些地区土壤的风化潜力及其对酸雨的缓冲能力作了讨论。
In order to explore the buffer capacity of forest soils in some areas in China, this paper studied the mineralogy by X-ray powder diffraction on the basis of mineral separation and enrichment of soil samples from several typical forest regions in China. In this experiment, Methyl iodide liquid system density gradient grading of fine sand minerals in the soil, while the soil sludge samples were strictly sorted, concentrated <2μm clay, and then were respectively mineral analysis identified; according to the results, The composition of fine sand and clay minerals in forest soils was compared and the potential of soils in these areas and their buffering capacity to acid rain were discussed.