SACCHARIDES IN SOME JAPANESE PADDY SOILS

概要

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Monosaccharides released by acid hydrolysis from paddy field soil, from the light and the heavy fraction of soil, from peat, and from some plant fragments were determined using automated anion-exchange chromatography. Between 5 and 12 per cent of the organic carbon was present as saccharides. The monosaccharide composition of the different soils was very similar, in spite of differences in the absolute amount of saccharides present. The amount of the various monosaccharide in the whole soil was found to be in the order glucose>>xylose>galactose, mannose, arabinose>rhamnose>ribose. The monosaccharide composition of the soils showed a marked contrast to that of the rice fragments and partially decomposed plant remains taken from the soil. Glucose, xylose, arabinose were the predominant saccharides in the rice fragments and the plant remains, while the amounts of galactose, mannose, rhamnose were negligibly small. It was found that the proportion of galactose, mannose, rhamnose and ribose in the heavy fraction of soil was greater than that of glucose, xylose, and arabinose. The present observation was in agreement with the view that soil saccharides comprised of pentoses originates in plant materials. The molar ratio of xylose to mannose was calculated to show the characteristics of the monosaccharide composition of soils and some plant materials.
社団法人日本土壌肥料学会の論文