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The effect of active base production by plants in rhizosphere soils on soil carbon sequestration

Research Project

Project/Area Number 19K12299
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionRakuno Gakuen University

Principal Investigator

Hobara Satoru  酪農学園大学, 農食環境学群, 教授 (70391159)

Co-Investigator(Kenkyū-buntansha) 松本 真悟  島根大学, 学術研究院農生命科学系, 教授 (00346371)
森泉 美穂子  龍谷大学, 農学部, 教授 (10220039)
澤本 卓治  酪農学園大学, 農食環境学群, 教授 (60364246)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords土壌炭素 / 土壌有機物 / 根圏土壌 / ケイ酸吸収 / 炭素隔離 / 植物根 / 火山灰土壌 / CO2放出 / 土壌炭素隔離
Outline of Research at the Start

本研究では、植物が根圏土壌鉱物中の活性塩基生成を通じて土壌有機物の蓄積や安定性にどのような影響を及ぼすかを解明することを目的とする。研究内容は、植物根圏土壌中の活性塩基生成促進が土壌有機物の保持に及ぼす影響と、根圏で生成された活性塩基によって保持される土壌有機物の安定性の解明を主眼とし、植物根圏における土壌有機物蓄積試験、そして蓄積した土壌有機物からのCO2放出試験を軸に進める。本研究で得られた知見は、天然機能を利用した炭素貯留・温暖化対策技術の推進や、環境調和型農業施策の展開に役立つものと期待される。

Outline of Final Research Achievements

The objective of this study was to elucidate the effect of reactive base production by plants in rhizosphere soils on soil carbon sequestration. First, we investigated the rhizosphere soils of rice and other plants through several cultivation experiments, and found that the rhizosphere of rice plants with high silica absorption capacity has high levels of aluminum, iron, and adsorbed dissolved organic carbon, suggesting that the bases in the rhizosphere soil are activated by plant absorption of silica, and are associated with organic matter, leading to carbon accumulation. Experiments on the decomposition of recalcitrant soil organic matter suggested that the addition of substances that promote the desorption of reactive base-organic matter associations may accelerate decomposition. Thus, the present study clarified the relationship between the reactivity of bases in the plant rhizosphere and soil carbon sequestration.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、植物が根圏土壌の塩基活性化や植物根が関係する新たなプロセスを通じて土壌の炭素蓄積隔離に影響するメカニズムを提示するとともに、そのプロセスによって蓄積する炭素が将来的に放出される過程でも同様の塩基と有機物の結びつきが深く関係していることを示唆している。これらの研究成果から、土壌中における活性塩基と有機物の関係は、植物を介して土壌への難分解性有機物および炭素の蓄積と放出の双方に関与すると考えられ、今後これが地球や地域の規模でどれほどの影響に及ぶかについてさらなる研究が必要と考えられた。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Open Access: 1 results,  Peer Reviewed: 3 results) Presentation (2 results)

  • [Journal Article] 土壌のカリウム供給能の違いがイネおよびトマトの根の特性に与える影響2023

    • Author(s)
      茂木京菜・宮城慧・亀岡笑・小八重善裕・中谷暢丈・金子命・森泉美穂子・春日純子・松本真悟・阿江教治・保原達
    • Journal Title

      酪農学園大学紀要

      Volume: 47 Pages: 99-107

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] Effects of weathering and silicic acid uptake by rice plants on weathered products -Quantitative changes in potassium, silica, and aluminum in granitic Fluvisol-2021

    • Author(s)
      Mihoko Moriizumi, Noriharu Ae, Kaho Ozawa, Yuki Yoshida, Rei Hamano & Kaisei Numadate
    • Journal Title

      Soil Science and Plant Nutrition

      Volume: 67 Issue: 4 Pages: 439-445

    • DOI

      10.1080/00380768.2021.1944307

    • NAID

      210000159368

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mineral weathering and silicon uptake by rice plants promote carbon storage in paddy fields2021

    • Author(s)
      Kusa, K., Moriizumi, M., Hobara, S., Kaneko, M., Matsumoto, S., Kasuga, J., Ae, N.
    • Journal Title

      Soil Science and Plant Nutrition

      Volume: 68 Issue: 2 Pages: 162-170

    • DOI

      10.1080/00380768.2021.1878471

    • NAID

      210000158998

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Amino acids and amino sugars as molecular indicators of the origins and alterations of organic matter in buried tephra layers2020

    • Author(s)
      Hobara, S., Ogawa, H., Benner, R.
    • Journal Title

      Geoderma

      Volume: 373 Pages: 114449-114449

    • DOI

      10.1016/j.geoderma.2020.114449

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] イネ科植物の根細胞壁表面の官能基特性について2024

    • Author(s)
      小川弥玲、川村美紗妃、畑中朋子、阿江教治、保原達
    • Organizer
      第65回日本植物生理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 土壌のカリウム供給能の違いがイネおよびトマト根表面のイオン吸着特性に与える影響2023

    • Author(s)
      茂木京菜・宮城 慧・亀岡 笑・小八重善裕・中谷暢丈・金子 命・森泉美穂子・春日純子・松本真悟・阿江教治・保原 達
    • Organizer
      日本植物生理学会
    • Related Report
      2022 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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