海南岛北部玄武岩上土壤发生研究Ⅲ.元素地球化学特征
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* 国家自然科学基金重点基金项目(49831004);中国科学院特别支持项目(90科计发0854)


STUDY ON GENESIS OF SOILS DERIVED FROM BASALT IN NORTHERN HAINAN ISLAND Ⅲ. ELEMENT GEOCHEMISTRY
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    摘要:

    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。

    Abstract:

    As soil ages,its contents of Sr,Ba and Sr/Be decrease,and the contents of V,Sc,Ni,Cr,Co as well as Fe/Ni and Fe/Co rise,which was discovered in a study on soils of different soil ages,developed on basalts in the north Hainan Island.Ba/Nb,significantly,correlative with soil ages can be used to evaluate soil development.By the mass-balance method to element migration was discussed with Ti as immobile element.The results show that elements leach most extremely in weakly-developed soils.In this period (Entisols),over 90 per cent of Ca,Mg,K and Na were lost,out of solum till ferrosols formation.The leaching of P occurred mainly in the beginning of soil development.About 60 per cent of Si lost in the stage of Cambisols and 80 per cent in the stage of Ferralisols.

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黄成敏,龚子同.海南岛北部玄武岩上土壤发生研究Ⅲ.元素地球化学特征[J].土壤学报,2002,39(5):643-652. DOI:10.11766/trxb200010010505 Huang Cheng-min, Gong Zi-tong. STUDY ON GENESIS OF SOILS DERIVED FROM BASALT IN NORTHERN HAINAN ISLAND Ⅲ. ELEMENT GEOCHEMISTRY[J]. Acta Pedologica Sinica,2002,39(5):643-652.

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  • 收稿日期:2000-10-01
  • 最后修改日期:2000-12-25
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  • 在线发布日期: 2013-02-25
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