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The air irrigation effect of dew saves water during agriculture in arid/semiarid areas

Research Project

Project/Area Number 17H04634
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Agricultural environmental engineering/Agricultural information engineering
Research InstitutionKochi University

Principal Investigator

MORI MAKITO  高知大学, 教育研究部自然科学系農学部門, 教授 (60325496)

Co-Investigator(Kenkyū-buntansha) 北野 雅治  九州大学, 農学研究院, 教授 (30153109)
木村 玲二  鳥取大学, 乾燥地研究センター, 准教授 (80315457)
丸居 篤  弘前大学, 農学生命科学部, 准教授 (80412451)
長 裕幸  佐賀大学, 農学部, 教授 (90136599)
安武 大輔  九州大学, 農学研究院, 准教授 (90516113)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywords結露 / 水資源 / Air irrigation / 乾燥地 / 節水農業 / 葉面結露 / 半乾燥地 / 微気象 / 未利用水資源 / 灌漑 / 露 / Air-irrigation / 節水 / 光合成
Outline of Final Research Achievements

Dew is a micrometeorological phenomenon observed worldwide. It occurs on calm, clear nights, and involves the condensation of water from the atmosphere on various land surfaces. We performed a 3-year field experiment during 2018–2020 in a corn field in northern China, to investigate the effects of dew on crops. The characteristics of dew were investigated thoroughly, including its relationships with micrometeorological parameters. The amount of dew tended to increase as the water vapor pressure increased in the spring. However, the occurrence of dew on leaves was limited by the atmospheric water vapor pressure, through the suppression of radiation cooling in the summer season. Dew saves water during agriculture in semiarid areas through its natural irrigation effect, which we refer to as "air irrigation".

Academic Significance and Societal Importance of the Research Achievements

結露とは風の弱い晴れた夜間に地面や植物に露が付着する現象として世界中で広く知られています。本研究では、2018-2020年の間、中華人民共和国北西部のトウモロコシ畑において露と気象の関係を調べました。結露がみられる日は雨の日に比べて多く、また、夜間から日没後にかけて10時間近く継続しました。乾燥地において露は農作物にとって非常に身近な存在であることがわかりました。また、露が葉から吸収され、さらに気孔から失われる水分を減らす効果があることが示されました。露の量は雨に比べてとても少ないのですが、利用されない水資源ですが、空気からの一種の灌漑の効果を持ち、現地の節水農業に大きく寄与しています。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2021 2018 2017

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Limiting factor of dew formation changes seasonally in a semiarid crop field of northwest China2021

    • Author(s)
      Gaku Yokoyama, Daisuke Yasutake, Weizhen Wang, Yueru Wu, Jiaojiao Feng, Leilei Dong, Kensuke Kimura, Atsushi Marui, Tomoyoshi Hirota, Masaharu Kitano, Makito Mori
    • Journal Title

      Agricultural and Forest Meteorology

      Volume: 311 Pages: 108705-108705

    • DOI

      10.1016/j.agrformet.2021.108705

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 作物畑のH2O・CO2ガスフラックスを計測するための簡易な閉鎖型チャンバシステム2018

    • Author(s)
      安武大輔,横山岳,長谷川美嘉,木村建介,丸居篤,森牧人,北野雅治,呉月茹,王維真
    • Organizer
      日本農業気象学会九州支部・日本生物環境工学会九州支部合同大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Effects of leaf wetting by dew on diurnal variation of gas exchange in maize2018

    • Author(s)
      Gaku Yokoyama, Keisuke Minami, Mika Hasegawa, Makito Mori, Atushi Marui, Masaharu Kitano, Daisuke Yasutake, Weizhen Wang
    • Organizer
      International Symposium on Agricultural Meteorology 2019 (ISAM2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 光合成の昼寝現象をもたらす環境生理学的要因の分析-個葉の環境ストレスにもとづく評価-2018

    • Author(s)
      谷崎 司,安武大輔,横山岳,森 牧人,北野雅治
    • Organizer
      日本農業気象学会2018年全国大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 光合成の昼寝現象をもたらす環境生理学的要因の分析 - 文献調査による発生要因の整理 -2018

    • Author(s)
      谷崎 司,安武大輔,横山 岳,森 牧人,北野雅治
    • Organizer
      日本農業気象学会2018年全国大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Air irrigation effects of leaf wetting by dew: Effect onwhole platn water relations and gas excahnge in mazeunder water stress2018

    • Author(s)
      YOKOYAMA Gaku, YASUTAKE Daisuke, MORI Makito, WANG Weizhen, WU Yueru, KITANO Masaharu
    • Organizer
      International Symposium on Agricultural Meteorology 2018 (ISAM2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of leaf wetting on midday depression of gasexchange in a tomato plant2018

    • Author(s)
      YOKOYAMA Gaku, YASUTAKE Daisuke, TANIZAKI Tsukasa, MORI Makito, KITANOMasaharu
    • Organizer
      International Symposium on Agricultural Meteorology 2018 (ISAM2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 夜間冷却条件下の結露生成に関する基礎研究―観測とシミュレーション―2017

    • Author(s)
      原田理紗子・森 牧人・谷岡紘亘・安武大輔
    • Organizer
      平成29年度日本農業気象学会中国・四国支部大会
    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2023-01-30  

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