水草(クロモ,Hydrilla verticillata Presl.)の微生物分解に伴なう有機物組成の変化

概要

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An aqueous microbial decomposition experiment of a freshwater water weed (Hydrilla Verticillata, Presl.) was conducted, whereby changes in organic compositions from live to degraded plant materials after 1 and 2 years' incubation were investigated. Organic constituents, e.g., lipids (hydrocarbons, fatty acids and phytol), amino acids, carbohydrates and cellulose were determined by use of a gas-liquid chromatography. The decrease in the total organic matter after 1 and 2 year's incubation were estimated to be 39% and 32% respectively. Carbohydrates and cellulose decreased most significantly. Relative compositions of amino acids changed little, wheras those of fatty acids and carbohydrates changed in certain tendencies which might explicate the observations in nature. Those analyzable organic constituents decreased as decomposition proceeded and the unanalyzable lignin and/or humic materials comprised more than 75% of the organic matter in the plant residue of 2 years' decomposition.
日本地球化学会の論文
1982-11-30