2011 Fiscal Year Final Research Report
Identification of stress factors in soil organic matter dynamics in humid regions and its utilization in agriculture
| Project/Area Number |
20248008
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
KOSAKI Takashi 首都大学東京, 都市環境科学研究科, 教授 (00144345)
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| Co-Investigator(Kenkyū-buntansha) |
NAWATA Eiji 京都大学, 農学研究科, 教授 (30144348)
FUNAKAWA Shinya 京都大学, 地球環境学堂, 教授 (20244577)
YANAI Junta 京都府立大学, 生命環境科学研究科, 教授 (00273491)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 湿潤熱帯 / ストレス要因 / 土壌有機物動態モデル / 土壌微生物 |
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| Research Abstract |
The possibility for introducing stress-factors that could modify the soil organic matter dynamics under humid regions was tested. Two-step decomposition model including both solubilization and mineralization processes in the decomposition of polysaccharides and two-step metabolism by soil microorganisms in substrate utilization were evaluated positively in quantifying influence of stress factors such as soil acidity on the processes ; and the Michaelis-Menten kinetics was successfully applied for describing individual decomposition processes. The soil acidity was considered to be one of most important factors that significantly affected both processes.
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