HUMUS COMPOSITION OF PEAT LAND PLANT REMAINS

概要

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Plant remains of peat collected in Hokkaido were examined with regard to humus compositions by means similar to those used by KUMADA et al. The examined samples of plant remains covered 34 species, 24 genera, and 19 families. The results were as follows : (1) HT, HE, and PQ varied considerably with the samples over a fairly large range, implying their relationships with the ash content or degree of humification of the samples to some extent. (2) On the basis of RF-⊿logk correlations and the humic acids spectra types, the plant remains may be grouped as follows : Group I : Remains of the organs, with the possible exception of the roots, of most grassy plants, several species such as Osmunda cinnamomea excepted ; remains of woody plant xylem and some woody plant leaves. Group I characterized by lignins. Group II : Remains of shrubby and woody plant organs with the exception of woody plant xylem and some exceptional woody plant leaves. Group II characterized by tannins. Group III : Remains of mosses. (3) Humic acid characteristics due to tannins were thought to disappear in the relatively early stages of the rotting process, during which RF-PQ and RF-⊿logk correlations varied in a direction opposite to the normal humification process.
社団法人日本土壌肥料学会の論文