秋田地方のスギ林土壤及び黒色土に関する研究(第2報) : 土壤型と腐植形態との関係(その1)

概要

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This study was made according to SPRINGER'S method to get some information on the humus forms and to make clear the correlation between soil types and humus forms of the same forest soils described in Part I.The mineral horizons of Japanese ceder forest soils showed a similar tendency with the chemical properties according to the transition of the soil types. In wet-type soils (BE and BD type) that showed high base saturation and low acidities, the humus substances showed high humification, high stability against oxidation and the remarkable formation of Ca- and Mg-humate. In dry-type ((except A-(B) horizon of BB type)) and Podsol soil that showed remark able leaching of bases and high acidities, the humus substances showed low humification, low stability against oxidation and the formation of the acid soluble Fe- and Al-humate which, however, was not remarkable except B_1 horizn of P_D_I type.The humus substances of H-layers were not combined with bases and showed high humification but low stability against oxidation.On black soils, it is very interesting that in spite of their low base saturation and high acidities-especially of (Bl)C type-like the dry-type Japanese ceder forest soils, their humus substances were highly humified and stable against oxidation like to the wet-type Japanese ceder forest soils. So its humus forms would be different from brown forest soils.
1954-10-25