Contribution of physical protection and/or chemical adsorption of easily decomposable soil organic matter to the processes of mineralization

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  • Matsuoka Kaori
    United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology

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  • 土壌易分解性有機物の無機化過程に及ぼす有機物の物理的隔離および化学的吸着の寄与
  • ドジョウイブンカイセイ ユウキブツ ノ ムキカ カテイ ニ オヨボス ユウキブツ ノ ブツリテキ カクリ オヨビ カガクテキ キュウチャク ノ キヨ

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Abstract

The mineralization rate of soil organic matter by soil microorganisms is influenced strongly not only by the inherent chemical nature of the organic matter (i.e., its chemical structure, functional groups, and composition) but also by the interactions with soil components. These interactions can be classified roughly into physical protection and chemical adsorption. Physical protection is defined as the inaccessibility of soil organic matter to soil microorganisms due to obstruction by soil components, whereas chemical adsorption is defined as the degree of the adsorptive forces between soil organic matter and soil components. This paper provides an overview of the significance of these two processes, with a focus on analytical methodologies.

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