title: Ground-level O3 pollution and its impacts on food crops in China: a review.
abstract: Ground-level ozone (O3) pollution has become one of the top environmental issues in China, especially in those economically vibrant and densely populated regions. In this paper, we reviewed studies on the O3 concentration observation and O3 effects on food crops throughout China. Data from 118 O3 monitoring sites reported in the literature show that the variability of O3 concentration is a function of geographic location. The impacts of O3 on food crops (wheat and rice) were studied at five sites, equipped with Open Top Chamber or O3-FACE (free-air O3 concentration enrichment) system. Based on exposure concentration and stomatal O3 flux-response relationships obtained from the O3-FACE experimental results in China, we found that throughout China current and future O3 levels induce wheat yield loss by 6.4-14.9% and 14.8-23.0% respectively. Some policies to reduce ozone pollution and impacts are suggested.
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China. Electronic address: fzz@rcees.ac.cn.
authors.forename: Zhaozhong
authors.initials: Z
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China.
authors.forename: Enzhu
authors.initials: E
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China.
authors.forename: Xiaoke
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing Road 18, Haidian District, Beijing 100085, China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Jiang
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Liu
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000633:toxicity; D002681:China; D018556:Crops, Agricultural / Q000187:drug effects*; D004787:Environmental Pollution / Q000706:statistics & numerical data*; D006801:Humans; D012275:Oryza / Q000187:drug effects; D010126:Ozone / Q000032:analysis* / Q000633:toxicity; D014908:Triticum / Q000187:drug effects
chemical_list: D000393:Air Pollutants; D010126:Ozone
keywords: China; Crop yield loss; Ozone concentration distribution; Policy