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| The impact of elevated ozone concentration on the yield and grain quality of maize on field |
| Received:May 21, 2024 |
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| KeyWord:O3;biomass;sensitivity;dose-response relationship;nutrients;mineral elements |
| Author Name | Affiliation | E-mail | | ZHANG Danhong | State Key Laboratory for Ecological Security of Regions and Cities, Research Center for Eco-Environmental Sciences, China
Chinese Academy of Sciences, Beijing 100085, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | WANG Xiaoke | State Key Laboratory for Ecological Security of Regions and Cities, Research Center for Eco-Environmental Sciences, China
Chinese Academy of Sciences, Beijing 100085, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | FENG Meiqi | State Key Laboratory for Ecological Security of Regions and Cities, Research Center for Eco-Environmental Sciences, China
Chinese Academy of Sciences, Beijing 100085, China
College of Life Sciences, Hebei Normal University, Shijiazhuang 050016, China | | | GAO Yiqin | State Key Laboratory for Ecological Security of Regions and Cities, Research Center for Eco-Environmental Sciences, China
Chinese Academy of Sciences, Beijing 100085, China
College of Life Sciences, Hebei Normal University, Shijiazhuang 050016, China | | | ZHANG Nan | Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | YIN Baohui | Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | GENG Chunmei | Chinese Research Academy of Environmental Sciences, Beijing 100012, China | gengcm@craes.org.cn |
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| Abstract: |
| In order to more accurately assess the impact of O3 pollution on maize yield and nutritional loss, this study established an opentop chamber（OTC）in the field in Zibo City, Shandong Province, China, to investigate the effects of different O3 concentrations on the yield and quality of Zhengdan 958, a widely planted maize cultivar in northern China. It was found that：under exposure to elevated O3 concentrations of 40, 80 nL·L-1, and 120 nL·L-1, maize yields decreased by 11.0%, 20.0%, and 48.2%, respectively, with a sensitivity index of O3 exposure（the absolute slope of the response relationship between relative yield and O3 dose）of 0.96%; following O3 exposure, there were no significant changes in kernel starch, protein, or fat concentrations, while K and Zn concentrations increased significantly; however, the yields of kernel starch, protein, and fat, as well as Ca, Mg, P, and Fe significantly decreased. The results indicate that under field-realistic O3 exposure, the yield sensitivity of Zhengdan 958 to O3 exposure is higher than that reported in previous global studies, suggesting that the current research may have underestimated the loss of maize yield caused by O3 pollution in China. Under elevated O3 exposure, the concentrations of nutrients in the kernels remain relatively stable, with even a few mineral elements significantly increasing, but the total supply of kernel nutrients and most mineral elements are significantly reduced. |
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