THE DISTRIBUTION OF PG (GREEN FRACTION OF P TYPE HUMIC ACID) AND THE DEGREE OF HUMIFICATION OF PB (BROWN FRACTION OF P TYPE HUMIC ACID) IN SOILS OF CENTRAL JAPAN

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概要

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• Pg contents of soils chosen from the major soil groups occurring in the mountain area of Central Japan were measured by the method presented by the author in a previous paper. The Pg contents of the soils ranged from 0 to 0.58 per cent of the dry soils. In podzolic soils, Pg contents were high in A horizons and gradually decreased with depth and in some cases of brown forest soils, Pg contents were highest in B horizons. The percentage of Pg in humic acid ranged from 0 to 8.6 per cent, and the highest value was observed in the C horizon of Dando B_D soil. Pg contents were high in humid and acidic soils containing much humic acid. Humidity, soil pH and humus content may affect the Pg accumulation by controlling the activity of Pg-producing fungi. Δ log K values of Pb were caluculated to estimate the degree of humification of P type humic acids and indicated that Pb's were relatively immature.

• 社団法人日本土壌肥料学会の論文

著者

• Sato Osamu

  Water Research Institute Nagoya University

関連論文

• THE CHEMICAL NATURE OF COMPONENTS OF PG : GREEN FRACTION OF P TYPE HUMIC ACID
• METHODS FOR ESTIMATING Pg CONTENT IN P TYPE HUMIC ACID AND FOR CALCULATING ΔLOG K OF ITS Pb FRACTION
• THE CHEMICAL NATURE OF THE GREEN FRACTION OF P TYPE HUMIC ACID
• A GREEN PIGMENT SIMILAR TO THE PG FRACTION OF P TYPE HUMIC ACIDS AND RELATED COMPOUNDS PRODUCED BY LITTER-DECOMPOSING FUNGI
• THE DISTRIBUTION OF PG (GREEN FRACTION OF P TYPE HUMIC ACID) AND THE DEGREE OF HUMIFICATION OF PB (BROWN FRACTION OF P TYPE HUMIC ACID) IN SOILS OF CENTRAL JAPAN

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