Impact assessment of ozone on crop productivity - A new method using plant growth model -

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20459
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 63040:Environmental impact assessment-related
• Research Institution: University of Yamanashi
• Principal Investigator: Yoshiyuki Kinose 山梨大学, 大学院総合研究部, 助教 (00818528)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: オゾン / 光合成 / 収量 / 植物成長モデル / 影響評価

Outline of Final Research Achievements

Recently, there is concern about negative effects of on agricultural crops. This study developed a growth model that incorporates effect and evaluated the -induced yield reduction at current concentrations for komatsuna, which is widely grown in the Kanto region, where concentrations are relatively high. Although the yield reduction rate due to varied among prefectures, it was highest in July, ranging from 10-27% (mean of 2010-2019). This was attributed to high concentrations and high temperatures in July, which promotes the adverse effects of . Therefore, it is necessary not only to take measures to reduce concentrations, but also to of global warming.

Free Research Field

植物生理生態学、農業気象学

Academic Significance and Societal Importance of the Research Achievements

これまでのオゾンの影響評価モデルは経験的なモデルであり、本研究で開発したプロセスベースの植物成長モデルはより多様な環境条件に適用できると考えられる。本モデルを用いた解析によって、7月頃はオゾン濃度が高いことに加えて、気温が高いことでオゾンの悪影響がより一層顕著になることが明らかになった。また、このことから、将来にわたって農作物の収量を高く維持していくためには、オゾン濃度の低減のみならず温暖化対策も同時に進める必要があることが明らかになった。