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Examination of soil aggregate structure, chemistry, and microbiology to enhance soil fertility

Research Project

Project/Area Number 15KT0036
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund
Section特設分野
Research Field Food Cycle Research
Research InstitutionNational Agriculture and Food Research Organization (2016-2017)
National Institute for Agro-Environmental Sciences (2015)

Principal Investigator

Wagai Rota  国立研究開発法人農業・食品産業技術総合研究機構, 農業環境変動研究センター, 上級研究員 (80456748)

Co-Investigator(Kenkyū-buntansha) 濱村 奈津子  九州大学, 理学研究院, 准教授 (50554466)
長尾 眞希 (浅野眞希)  筑波大学, 生命環境科学研究科, その他 (80453538)
森泉 美穂子  龍谷大学, 農学部, 准教授 (10220039)
Co-Investigator(Renkei-kenkyūsha) MORONO Yuki  国立研究開発法人海洋研究開発機構, 高知コア研究所, グループリーダー代理 (30421845)
Research Collaborator URAMOTO Go-Ichiro   (70612901)
Project Period (FY) 2015-07-10 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Keywords土壌有機物 / 有機炭素 / 有機窒素 / 団粒構造 / 微生物群集組成 / 農地管理 / 保全型農業 / トモグラフィー / 土壌団粒構造 / 三次元構造 / 間隙 / CT(マイクロCT) / 土壌管理 / 土壌炭素 / 土壌微生物群集組成 / 肥沃度 / 有機態窒素 / 生物地球化学 / 堆肥 / 不耕起 / アミノ酸 / 土壌団粒 / 土壌肥沃度 / 窒素循環 / 持続可能性 / 地力窒素 / 土壌微生物 / 長期連用試験
Outline of Final Research Achievements

Long-term soil conservation practices (compost addition, no-tillage) led to the accumulation of organic matter (OM) including organic N in the aggregates of intermediate density range as well as in low-density fraction. Despite characterization of alkali-soluble organic N, the chemical nature of the accreted N remained unclear. Using synchrotron-based X-ray computer tomography with Os staining of OM, we developed a method to visualize OM localization within macroaggregates at spatial resolution of 0.5 micron. Upon the decline in OM input to soil, the proportion of OM exposed to pores within macroaggregates declined and that of OM attached to solids increased. The approached developed here would make it possible to examine material transport, OM dynamics and microbial activity from the common physical framework of 3-D aggregate structure.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (14 results)

All 2018 2017 2016 2015 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results)

  • [Int'l Joint Research] University of Kassel(ドイツ)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Distinctive Roles of Two Aggregate Binding Agents in Allophanic Andisols: Young Carbon and Poorly-Crystalline Metal Phases with Old Carbon2018

    • Author(s)
      Wagai, R., Kajiura, M., Uchida, M., Asano, M.
    • Journal Title

      Soil Systems

      Volume: 2(2), 29 Issue: 2 Pages: 29-29

    • DOI

      10.3390/soilsystems2020029

    • NAID

      120007133045

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effects of amoebal bacterivory on carbon and nitrogen dynamics depend on temperature and soil structure interactions2016

    • Author(s)
      Geoffrey Zahn, Rota Wagai, Seiichiro Yonemura
    • Journal Title

      Soil Biology and Biochemistry

      Volume: 94 Pages: 133-137

    • DOI

      10.1016/j.soilbio.2015.11.021

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 陸域最大の炭素・窒素プールを制御する土壌微生物と土壌団粒構造2016

    • Author(s)
      和穎 朗太
    • Journal Title

      土と微生物

      Volume: 70 Pages: 3-9

    • NAID

      130005170829

    • Related Report
      2015 Research-status Report
  • [Presentation] Quantifying aggregate structure of contrasting carbon levels in Andisol by synchrotron-based X-ray microtomography2018

    • Author(s)
      Miwa Arai, Go-ichiro Uramoto, Maki Asano, Yuki Morono, Kentaro Uesugi, Akihisa Takeuchi, Nobusuke Iwasaki, and Rota Wagai
    • Organizer
      European Geosciences Union 2018 Annual Assembly
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] X線CT技術を用いた土壌団粒中の有機物と間隙構造の可視化2017

    • Author(s)
      荒井見和、浅野眞希、浦本豪一郎、諸野祐樹、和穎朗太
    • Organizer
      土壌肥料学会2017年大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 冬作緑肥の分解過程:比重分画法による定量と形態観察2017

    • Author(s)
      中塚博子、唐澤敏彦、大倉利明、浦嶋泰文、和穎 朗太
    • Organizer
      土壌肥料学会2017年大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] How organic matter interacts with mineral to form aggregates: a density-based approach using soils from a long-term field experiment2017

    • Author(s)
      Rota Wagai, Masako Kajiura, Maki Asano
    • Organizer
      6th International Symposium on Soil Organic Matter, Rothamsted Research, Harpenden, UK
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Binding agents for aggregation in some Andisols: organic vs. inorganic binders2017

    • Author(s)
      Rota Wagai, Maki Asano, Masako Kajiura
    • Organizer
      Workshop on Formation, Properties and Function of Soil Microaggregates
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 長期堆肥連用により蓄積する土壌窒素の存在形態を探る2016

    • Author(s)
      池谷 康祐・森泉 美穂子・松永 俊朗・和穎 朗太
    • Organizer
      日本土壌肥料学会2016年度佐賀大会
    • Place of Presentation
      佐賀大学(佐賀県佐賀市)
    • Year and Date
      2016-09-20
    • Related Report
      2016 Research-status Report
  • [Presentation] 長期堆肥連用により蓄積する土壌窒素の存在形態を探る2016

    • Author(s)
      池谷康祐・森泉美穂子・松永俊朗・和穎朗太
    • Organizer
      日本土壌肥料学会2016年度大会
    • Place of Presentation
      佐賀大学
    • Year and Date
      2016-09-19
    • Related Report
      2015 Research-status Report
  • [Presentation] Where are OM and reactive metals within bulk soil? a detail look at organo-mineral aggregates in Andisol surface horizons along TOC gradient2016

    • Author(s)
      Rota Wagai
    • Organizer
      26th Goldschmidt Conference (Geochemical Society & European Association of Geochemistry)
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2016-06-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Studies on soil organic matter dynamics and organic-mineral aggregation towards land sustainability2016

    • Author(s)
      Rota Wagai
    • Organizer
      Max-Schonleutner Award, Technische Universitat Munchen
    • Place of Presentation
      フレイジング (ドイツ)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Soil aggregate structure and its implications for microbial ecology: location and quality of substrates for heterotrophs2015

    • Author(s)
      Rota Wagai, Maki Asano, Masako Kajiura
    • Organizer
      Japan-Taiwan-Korea Symposium on Microbial Ecology(JSME2015)
    • Place of Presentation
      Tsuchiura, Ibaraki, Japan
    • Year and Date
      2015-10-17
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2015-07-14   Modified: 2019-03-29  

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