Properties of Microbial Biomass in Acid Soils and Their Turnover |
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Authors: | Kazuyuki Inubushi Kazunori Sakamoto Takuji Sawamoto |
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Institution: | Faculty of Horticulture, Chiba University, Matsudo, Chiba, 271-8510 Japan;Rakuno Gakuen University, Ebetsu, Hokkaido, 069-8501 Japan |
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Abstract: | The soil microbial biomass is important such as pool of plant nutrients and is also driving force of the cycling of C, N, P and S in soil. However, the microbial biomass in acid soil has not been fully investigated due to the limitation of methods, i.e. chloroform-fumigation incubation or substrate-induced respiration because of decreased basal mineralization in chloroform-fumigated soil under acid conditions. This paper reviews improvement and application of these methods and vertical distribution of microbial biomass in two kinds of acid soils; namely, Andisols as dominant upland soils in Japan and tropical peat soils as potentially important lowland soils for agriculture, and also discuss on C and N turnover of microbial biomass in Andisols. Microbial succession in acid soil has also not been investigated so much, but, some studies in another important acid soil, i.e. acid sulfate soil, were also reviewed briefly. |
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Keywords: | acid sulfate soil Andisols ATP chloroform-fumigation extraction turnover |
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