Fang Xiao-Kun, Luo Xiao-San, Zhang Dan, Wu Li-Chun, Qiu Dan, Chen Zhi-Wei, Zhao Zhen
Jiangsu Key Laboratory of Agricultural Meteorology, Department of Agricultural Resources and Environment, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China.
China Jiangsu Farmland Quality and Agricultural Environmental Protection Station, Nanjing 210036, China.
Huan Jing Ke Xue. 2020 Aug 8;41(8):3797-3803. doi: 10.13227/j.hjkx.201912268.
The increase in the surface ozone (O) concentration causes air pollution, which has become a significant environmental issue that is of increasing concern. Ozone pollution not only directly harms human health, but also influences the agricultural ecosystem by impacting crop growth, which may then indirectly affect human health through food quality and the safety of agricultural products. The effects of O pollution on rice growth, yields, and mineral metal contents in grains were investigated through field experiments with increased O concentration treatment (remaining at 100 nL·L) in open top chambers (OTC). The crop growth and metal contents of two rice varieties were analyzed and compared. The results showed that the higher O concentration inhibited the photosynthesis of Nanjing 5055 and Yangdao 6 rice leaves, reduced the chlorophyll content and leaf area index, and subsequently led to a decline in the rice yield of 45.5% and 28.6%, respectively. However, compared with the natural control, the contents of most mineral metallic elements in the brown rice and glume of the harvested grains increased by 3.6%-19.8% and 3.9%-36.0%, respectively, thus resulting in a lack of essential trace elements or pollution of heavy metals; hence, the impact of O on rice food quality and safety requires a comprehensive evaluation.
地表臭氧（O）浓度的增加导致空气污染，这已成为一个日益受到关注的重大环境问题。臭氧污染不仅直接危害人类健康，还通过影响作物生长对农业生态系统产生影响，进而可能通过食品质量和农产品安全间接影响人类健康。通过在开顶式气室（OTC）中进行增加臭氧浓度处理（保持在100 nL·L）的田间试验，研究了臭氧污染对水稻生长、产量及籽粒中矿质金属含量的影响。对两个水稻品种的作物生长和金属含量进行了分析和比较。结果表明，较高的臭氧浓度抑制了南京5055和扬稻6号水稻叶片的光合作用，降低了叶绿素含量和叶面积指数，随后分别导致水稻产量下降45.5%和28.6%。然而，与自然对照相比，收获籽粒的糙米和颖壳中大多数矿质金属元素的含量分别增加了3.6% - 19.8%和3.9% - 36.0%，从而导致必需微量元素缺乏或重金属污染；因此，臭氧对水稻食品质量和安全的影响需要进行全面评估。
