Melkerud et al.(2003)による〔『Historical weathering based on chemical analyses of two spodosols in southern Sweden』(49p)から〕

『スウェーデン南部の2種のスポドゾル(ポドゾル)の化学分析に基づく歴史的な風化作用』


Abstract
 Chemical weathering losses were calculated for two conifer stands in relation to ongoing studies on liming effects and ash amendments on chemical status, soil solution chemistry and soil genesis. Weathering losses were based on elemental depletion trends in soil profiles since deglaciation and exposure to the weathering environment. Gradients in total geochemical composition were assumed to reflect alteration over time. Study sites were Horrod(後ろのoの頭に¨) and Hasslov(oの頭に¨) in southern Sweden. Both Horrod(後ろのoの頭に¨) and Hasslov(oの頭に¨) sites are located on sandy loamy Weichselian till at an altitude of 85 and 190 m a.s.l., respectively. Aliquots from volume determined samples from a number of soil levels were fused with lithium metaborate, dissolved in HNO3, and analysed by ICP-AES. Results indicated highest cumulative weathering losses at Hasslov(oの頭に¨). The weathering losses for the elements are in the following order:
  Si>Al>K>Na>Ca>Mg.
Total annual losses for Ca+Mg+K+Na, expressed in mmolc m-2 yr-1, amounted to c. 28 and 58 at Horrod(後ろのoの頭に¨) and Hasslov(oの頭に¨), respectively. Variations between study sites could not be explained by differences in bulk density, geochemistry or mineralogy. The accumulated weathering losses since deglaciation were larger in the uppermost 15 cm than in deeper B horizons for most elements studied.

Keywords: geochemistry; haplic podzol; podzolization; Skane(aの頭に゜) Sweden; till; typic haplorthod; weathering; zircon; zirconium』

1. Introduction
2. Materials and methods
3. Results and discussion
4. Conclusions
Acknowledgements
References


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