土壌中の酸抽出性有機物の分画と画分の化学的特性

概要

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To study the humic constituents in acid-extractable organic matter assumed as a fraction containing lower members of soil humic polymers, colored matter in the organic matter extracted with dilute orthophosphoric acid from surface horizons of a Melanudand and a Haplaquept was fractionated and purified. Fractionation and purification were done on the basis of adsorbability onto and elutability from active carbon, the behavior of precipitation with calcium and aluminum ions, adsorbability onto XAD-8 resin, passage over IR-120 resin, non-distillability under reduced pressure, and solubility in ethanol. Four fractions were separated and obtained as powder. They were considered as serial fractions containing lower members of soil humic polymers from the data of E_4/E_6 ratios and IR and ^<13>C-NMR spectra of the fractions and humic acids. It was suggested that the fraction unprecipitable with calcium ion and also unadsorbable onto XAD-8 resin contains the lowest members of humic polymers.
一般社団法人日本土壌肥料学会の論文
1996-08-05