Yield loss in rice by acute ozone pollution could be recovered

Abstract

Rising concentration of surface O3 threatens crop production and food security. To improve the evaluation and develop efficient adaptations, it is essential to study the effects of acute O3 pollution. We adopted this study by open‐top chamber (OTC) method and found that the fumigation of elevated O3 (NF40) for short (tillering and jointing, heading and ripening) and long periods during rice growth reduced the grain yield by 17, 19 and 25%, respectively, showing that both of the acute and chronic O3 pollution reduce rice production. Moreover, in comparison with the plants under chronic O3 pollution, grain yield was increased when O3 was removed at different stages: 32% increment at tillering and jointing and 34% increment at heading and ripening. These results suggest a possibility to recover the yield loss in rice under O3 pollution.

A comprehensive assessment of yield loss in rice due to surface ozone pollution in India during 2005–2020: A great concern for food security

“…They showed that, compared to a day with a maximum ozone concentration of <60 ppbv, an extra day with a peak ozone concentration of >120 ppbv is accountable for 1.1 ± 0.83% of yield loss in rice. The opentop chamber (OTC) study by Zhang et al (2022) reported that yield loss (YL) of rice is higher, when the crop is exposed to ozone continuously during its entire growth period than that episodically during its different growth stages. A decrease in surface ozone causes increase in rice production by 9.8% in the absence of anthropogenic emissions, as observed in a sector-by-sector examination of air pollution impacts on rice in China (Xu et al, 2022).…”

Assessment of rice yield and economic losses caused by ground-level O3 exposure in the Mekong delta region, Vietnam

“…Studies in China reported that the total relative yield losses (RYLs) of wheat and rice were 18.4–49.3% and 6.2–52.9% between 2014 and 2018, respectively [ [15] , [16] , [17] , [18] ]. Ground-level O 3 pollution can reduce individual grain weight and the number of rice grains by up to 5% and 20%, respectively [ [19] , [20] , [21] ] and of wheat by up to 18% and 11%, respectively [ 22 , 23 ].…”