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• 基金项目：

• 李日邦
• 中国科学院地理研究所

• 朱文郁
• 中国科学院地理研究所

• 摘要：本文研究了我国12种地带性自然土壤中氟和碘的含量情况及其在土壤剖面中的分布状况.研究表明,自然土壤总氟的含量范围为109-451ppm,几何平均值为281ppm,低于耕作土的几何平均值(379ppm).总碘含量范围为0.97-18.49ppm,几何平均值为2.79ppm.自然土壤中的氟主要来自成土母质和母岩,碘主要来自大气降水.成土母质亦有一定的补给作用.

• Abstract：The concentration of fluoride and iodide in the zonal natural soil as well as the distribution of them in soil section were studied. The concentration range of total fluoride in zonal natural soil in China is from 109 to 46lppm, geometric average being 281ppm, and lower than that in the cultivated soil (379ppm). The concentration range of total iodide in zonal natural soil is between 0.97 and 18.49ppm, geometric average being 2.79ppm. The main source of fluoride in natural soil is original clay-forming material and rock-forming soil. Iodide in natural soil is mainly from precipitation, but the original clay-forming material supplements some iodide to soil too.

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