Relationships between the amount of microbial biomass and the physicochemical properties of soil: Comparison betweem volcanic and non-volcanic ash soils
1997
Guan, G. (Tottori Univ. (Japan)) | Marumoto, T. | Shindo, H. | Nishiyama, M.
We measured the amount of microbial biomass and some physicochemical properties of 9 volcanic ash soils and 7 non-volcanic ash soils in Japan and analyzed their relationships. The results obtained are as follows: 1) The amounts of biomass C and N did not significantly differ between the volcanic and non-volcanic ash soils. 2) Both in volcanic and non-volcanic ash soils, the amounts of biomass C and N showed significant relationships with organic C content, total N content, total humus content, NaOH-extracted humic acid content, NaOH-extracted fulvic acid content and Al2O3 content. The relationships between the amounts of biomass C and N and the CEC and phosphate absorption coefficient were significant only in volcanic ash soils, and the relationship between the amount of biomass and clay content was significant in non-volcanic ash soils. The soil characteristics having significant relationships with the amount of biomass also showed significant relationships with fulvic acids, total humus, humic acids or organic C contents. 3) The relationships between the amounts of biomass C and N and several soil characteristics such as organic C, total N, total humus, fulvic acids, humic acid content, CEC, phosphate absorption coefficient and Al2O3 content can be separated into two groups: volcanic ash soil group and non-volcanic ash soil group
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