| Project/Area Number |
26292035
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OTSUKA Shigeto 東京大学, 農学生命科学研究科, 准教授 (10313074)
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| Co-Investigator(Kenkyū-buntansha) |
長岡 一成 国立研究開発法人農業・食品産業技術総合研究機構, 中央農業総合研究センター土壌肥料研究領域, 主任研究員 (80355544)
國頭 恭 信州大学, 理学部, 准教授 (90304659)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2014: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
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| Keywords | 土壌微生物 / リン可給性 / 群集構造 / 遺伝子組成 / 土壌酵素 / 資源配分 / リン / 黒ボク土 / ホスファターゼ / phoD / 機能遺伝子組成 / 土壌学 / 褐色森林土 / 資源配分モデル / 微生物群集構造 / リン酸 / 土壌酵素活性 |
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| Outline of Final Research Achievements |
The community structure based on 16S rDNA and the composition of alkaline phosphatase (ALP) gene, phoD, of soil bacteria in field andisols had a strong correlation with soil pH. Multiple regression analysis considering the Interaction effect showed that the relationship between available P concentration and the enzyme activity ratio of acid phosphatase (ACP) to beta-glucosidase (BG) depended on soil pH and the community structure.
In experimental microcosms of andisol and brown forest soil, the addition of C- and N- sources disturbed microbial community structure, and increased the enzyme activity ratios of ALP/BG and ACP/BG. However, the ratios later decreased nearly to the original level.
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