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Development of crop growth model coupled with soil water and solute dynamics model accounting for topography and light environment

Research Project

Project/Area Number 20H03097
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 41030:Rural environmental engineering and planning-related
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Saito Hirotaka  東京農工大学, (連合)農学研究科(研究院), 教授 (70447514)

Co-Investigator(Kenkyū-buntansha) 辰己 賢一  東京農工大学, (連合)農学研究科(研究院), 准教授 (40505781)
山下 恵  東京農工大学, (連合)農学研究科(研究院), 准教授 (70523596)
小島 悠揮  岐阜大学, 工学部, 准教授 (70767475)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2020: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Keywords土壌物質動態モデル / 作物モデル / 数値解析 / 土壌物質移動モデル / 土中物質移動モデル / 作物成長モデル / 土中水分移動モデル / 作物成長 / 水ストレス / 根の吸水 / 作物成長・収量モデル / 土中水分・物質動態解析 / 地形 / 光環境 / 土中水分・熱移動 / ファイトトロン
Outline of Research at the Start

畝などの地表面の構造や土の物質移動特性の空間的なばらつきが作物の収量・バイオマスに与える影響の定量的な評価はほとんどできていない.既存の動的作物成長モデルは,土壌中の物質動態とその作物体地上部への影響を極めて単純化している.一方で,土壌物質動態モデルの多くは,作物体地上部に与える影響についてはほとんど定量的な検討がなされていない.本研究では,土壌中の水分・溶質動態解析モデルと群落光合成モデルを動的に結合し,土壌―大気―作物を連続体としてとらえ,土壌物質動態モデルによる根の吸水・吸収の精緻な計算と,作物の成長への定量的影響の高度な推定が可能な統合型作物成長モデルを構築することを目的とする.

Outline of Final Research Achievements

The objective of this study was to construct a sophisticated integrated dynamic crop growth modelling tool by coupling the soil water and solute transport model, HYDRUS, and the canopy photosynthesis model, iRGM, which can take into account climatic conditions, surface conditions, and soil, water, and fertilizer management. The model was coupled through root water and nitrogen uptake, and the potential transpiration rate was obtained from the LAI computed by iRGM, and the actual transpiration rate was determined from soil moisture conditions. Nitrogen dynamics in the soil, including mineralization, was also computed simultaneously, and nitrogen was uptaken in accordance with water uptake. The growth process of rice plants was calculated using this coupled model and compared with observed data. The coupled model was able to calculate the growth process of the crop while precisely calculating soil moisture and nitrogen dynamics, and reproduced the measured data well.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した統合動的作物成長モデルでは,土中の物質移動と作物の成長過程を同時にかつ精緻に計算できるモデルとなっており,たとえば乾燥地での最適な水・肥料の管理を最適化するためのサポートツールとして使えるとともに,地球温暖化に伴う長期的な気候変動が農作物の成長に与える影響の評価に利用することができる.また本研究により開発したモデルを仮想空間上で圃場を再現し,農業の栽培支援を行う農業デジタルツイン等への応用が今後は期待される.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (14 results)

All 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Electrochemical degradation mechanism of trichloroethylene in glass bead model soil2022

    • Author(s)
      Bwire, D., Saito, H., Okiria, E.,
    • Journal Title

      Journal of Arid Land Studies

      Volume: 32 Issue: S Pages: 13-17

    • DOI

      10.14976/jals.32.S_13

    • ISSN
      0917-6985, 2189-1761
    • Year and Date
      2022-12-30
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Water Productivity and Harvest Index Response of Paddy Rice with Alternate Wetting and Drying Practice for Adaptation to Climate Change2022

    • Author(s)
      Bwire, D., Saito, H., Mugisha, M., Nabunya, V.
    • Journal Title

      Water

      Volume: 14 Issue: 21 Pages: 3368-3368

    • DOI

      10.3390/w14213368

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A dual-probe heat pulse-based sensor that simultaneously determines soil thermal properties, soil water content and soil water matric potential2021

    • Author(s)
      Kojima Yuki、Kawashima Tomoyuki、Noborio Kosuke、Kamiya Kohji、Horton Robert
    • Journal Title

      Computers and Electronics in Agriculture

      Volume: 188 Pages: 106331-106331

    • DOI

      10.1016/j.compag.2021.106331

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Numerical Analysis of Soil Water Dynamics during Spinach Cultivation in a Soil Column with an Artificial Capillary Barrier under Different Irrigation Managements2021

    • Author(s)
      Sao Davy、Saito Hirotaka、Kato Tasuku、Simunek Jirka
    • Journal Title

      Water

      Volume: 13 Issue: 16 Pages: 2176-2176

    • DOI

      10.3390/w13162176

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of Subsurface Drip Irrigation Designs in a Soil Profile with a Capillary Barrier2021

    • Author(s)
      Noguchi Koichi、Saito Hirotaka、Saefuddin Reskiana、Simunek Jirka
    • Journal Title

      Water

      Volume: 13 Issue: 9 Pages: 1300-1300

    • DOI

      10.3390/w13091300

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Coupling of Data Assimilation and Hydrus for Modeling Soil-Water and Heat Transport of Rain-Fed Soybean Field throughout Japan2022

    • Author(s)
      Rahman, S.A.T.M., Hamamoto, S., Saito, H., Tatsumi, K., Miyoshi, T., Nihei, N., Ichihashi, Y.
    • Organizer
      ASA, CSSA, SSSA International Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improving Water Productivity and Harvest Index of Paddy Rice with Alternate Wetting & Drying Irrigation Practice for Adaptation to Climate Change2022

    • Author(s)
      Bwire, D., Saito, H., Tatsumi, K.
    • Organizer
      ASA, CSSA, SSSA International Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Climate Smart Water and Soil Management Strategies for Achieving Food Security in Africa2022

    • Author(s)
      Bwire, D., Saito, H., Tatsumi, K.
    • Organizer
      Kirkham Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Performance of Hydrus -1D Model for Simulating Water Movement in Paddy Field Under Alternate Wetting & Drying Irrigation Technique2022

    • Author(s)
      Bwire, D., Saito, H.
    • Organizer
      JPGU 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 衛星観測に基づく全天・散乱日射量の高時間分解能広域推定2022

    • Author(s)
      川井千晃,宇田航希,山下恵.
    • Organizer
      令和4年度日本写真測量学会学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Estimation of heat balance with considering ground surface conditions in the crop field based on radiation balance and meteorological condition2021

    • Author(s)
      Mito Nishioka, Chiaki Kawai, Hirotaka Saito and Megumi Yamashita
    • Organizer
      Applications of Proximal and Remote Sensing Technologies for Soil Investigations
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 表面凹凸を考慮した圃場スケールでの斜面別熱収支の推定の試み2021

    • Author(s)
      西岡 美都、斎藤 広隆、山下 恵
    • Organizer
      第72回農業農村工学会関東支部大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 植物根が土壌の電気特性および熱特性に与える影響の解明2021

    • Author(s)
      小田 奈苗, 小島 悠揮, 神谷 浩二
    • Organizer
      2021年度農業農村工学会大会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Evaluating effects of plant roots on soil thermal properties with a thermo-TDR sensor2021

    • Author(s)
      Oda, N, Y. Kojima, K. Kamiya
    • Organizer
      JpGU Meeting 2021
    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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