Estimation of soil microbial biomass as the sink and source of base cation nutrients
Project/Area Number |
15K07337
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Plant nutrition/Soil science
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Research Institution | Nagoya University |
Principal Investigator |
Asakawa Susumu 名古屋大学, 生命農学研究科, 教授 (50335014)
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Research Collaborator |
YAMASHITA Kohei
TOKONAMI Yoshiki
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Project Period (FY) |
2015-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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Keywords | 土壌微生物バイオマス / 塩基類養分 |
Outline of Final Research Achievements |
This research project focused on soil microbial biomass as the sink and source of base cation nutrients for crops. The aim of this project was to reveal the functions of soil microbial biomass quantitatively by estimating amounts of base cations in soluble, exchangeable and biomass fractions and flow of the cations from the biomass fraction to the soluble and exchangeable fractions in soil. Amounts of biomass potassium and their dynamics were estimated in various farmland soils such as in rice paddy, upland, grassland and orchard soils. The conversion factors for estimation of biomass potassium by the chloroform-fumigation extraction method were presented in the paddy and upland soils. In addition, a turnover time of biomass potassium was calculated for the first time.
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Academic Significance and Societal Importance of the Research Achievements |
土壌中の微生物バイオマスに貯蔵されているカリウム量は,これまで植物へのカリウムの主要な供給源と考えられていた粘土鉱物などに保持されている交換性カリウム量の約3割に相当することや、微生物バイオマス中のカリウムが活発に代謝回転していることを明らかにし,カリウムの貯蔵源・供給源としての土壌微生物バイオマスの重要性を示した。
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Report
(5 results)
Research Products
(14 results)
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[Journal Article] Biogeochemical cycles and biodiversity as key drivers of ecosystem services provided by soils2015
Author(s)
P. Smith, M.F. Cotrufo, C. Rumpel, K. Paustian, P.J. Kuikman, J.A. Elliott, R. McDowell, R.I. Griffiths, S. Asakawa, M. Bustamante, J.I. House, J. Sobock, R. Harper, G. Pan, P.C. West, J.S. Gerber, J.M. Clark, T. Adhya, R.J. Scholes, M.C. Scholes
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Journal Title
Soil
Volume: 1
Issue: 2
Pages: 665-685
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Book] 土壌サイエンス入門 第2版2018
Author(s)
浅川 晋(分担執筆;木村 眞人、南條 正巳 編)
Total Pages
360
Publisher
文永堂出版
ISBN
9784830041358
Related Report
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