Construction of the model of crop impact from ozone, and evaluate the ozone risk in a broad region

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K12200
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 63040:Environmental impact assessment-related
• Research Institution: Center for Environmental Science in Saitama
• Principal Investigator: Yonekura Tetsushi 埼玉県環境科学国際センター, 自然環境担当, 担当部長 (40425658)
• Co-Investigator(Kenkyū-buntansha): 王 効挙 埼玉県環境科学国際センター, 自然環境担当, 担当部長 (20415392) ; 山口 真弘 長崎大学, 水産・環境科学総合研究科(環境), 准教授 (60736338)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: オゾン / 作物 / クリティカルレベル / リスク評価

Outline of Final Research Achievements

In order to examine the critical level of ozone in agricultural crops, ozone exposure experiments were conducted in Saitama and Nagasaki for such as Komatuna (Japanese mustard spinach). In addition, the risk of ozone on crops was evaluated in the Kanto region.
Based on ozone exposure experiments on Japanese mustard spinach, the AOT20 and AOT30 are suitable ozone indices for risk assessment. As a result of examining the critical level of ozone (AOT40 value when the yield is -5%) considered in Europe, the AOT40 value for one month was about 1.2ppm h. In addition, we created a spatial distribution map of AOT40 using continuous atmospheric monitoring data in the Kanto region, and mapped the effect of summer daytime ozone on the growth of Japanese mustard spinach.

Free Research Field

植物生理生態学

Academic Significance and Societal Importance of the Research Achievements

我が国のコマツナなどの近郊野菜を対象にしたオゾン曝露実験に基づいた、作物の成長に及ぼすオゾン影響評価モデル式を構築することによって、オゾンのクリティカルレベル（影響閾値）の評価を行うとともに、オゾンのリスクについて関東地方を対象地域として検討した。この結果は、我が国の植物保護のためのオゾンの環境指針値の提唱に向けた貴重なデータともなると考えられる。