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对海南岛北部玄武岩上不同风化成土年代的土壤研究发现 ,随风化成土年龄增加 ,土壤具有Sr、Ba含量减少 ,Sr/Be比值降低 ,而Ni、Cr、Co、V、Sc以及Fe/Ni和Fe/Co比值有增加的趋势。Ba/Nb与风化成土年龄相关性极好 ,可作为反映土壤风化程度的良好指标。运用质量平衡原理 ,以Ti为非移动元素探讨元素的迁移 ,发现元素淋溶作用在土壤发育初期最强烈。 90 %以上的Ca、Mg、K、Na在新成土阶段淋失 ,P的淋失也基本发生在此阶段 :约 60 %Si至雏形土阶段时已遭淋溶。
The results of soil age study on different age of weathered soils in northern basalts of Hainan Island showed that Sr, Be decreased, Sr, Be decreased while Sr, Ni and Fe / Co ratio tends to increase. Ba / Nb is extremely age-related to weathering and can be used as a good indicator of soil weathering. Using the principle of mass balance, the element migration is discussed with Ti as a non-moving element. It is found that element leaching is the strongest in the early stage of soil development. More than 90% of Ca, Mg, K and Na are leached in the new soil-forming stage, and the leaching of P basically occurs at this stage: about 60% Si has been eluted into the soil-shaped soil stage.