An Intermittent Exposure Regime Did Not Alter the Crop Yield and Biomass Responses to an Elevated Ozone Concentration

文献类型： 外文期刊

第一作者： Wang, Xiaoke

作者： Wang, Xiaoke;Zhang, Danhong;Huang, Binbin;Sun, Xu;Zhang, Hongxing;Wang, Xiaoke;Zhang, Danhong;Huang, Binbin;Tong, Sisi;Zhang, Shuai;Wan, Wuxing;Zheng, Feixiang

作者机构：

关键词： ozone; intermittent exposure; wheat; soybean; yield; biomass

期刊名称：ATMOSPHERE （ 影响因子：2.9； 五年影响因子：3.0 ）

ISSN：

年卷期： 2024 年 15 卷 4 期

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收录情况： SCI

摘要： The intermittent ozone (O-3) exposure of crops to alternating high and low concentrations is common in fields, but its impact on crop production has not been thoroughly investigated. In this study, two widely planted and O-3-sensitive crops, winter wheat and soybean, were intermittently exposed to elevated O-3 concentrations in open-top chambers. The results showed that the winter wheat and soybean yields significantly decreased with O-3 exposure (AOT40, cumulative hourly O-3 concentration above 40 ppb) (p < 0.001). The relative yield losses were 0.99% per AOT40 for winter wheat and 1.2% per AOT40 for soybean, respectively. The responses of the crop biomasses to elevated O-3 concentrations were lower than that of crop yield. Although the O-3-induced crop yield and biomass losses under continuous O-3 exposure were greater than those under intermittent O-3 exposure, the differences were not statistically significant. Therefore, we can conclude that the effects of elevated O-3 concentrations on crops are closely related to the exposure dose but not significantly related to the temporal distribution of elevated O-3 concentrations. This study improves our understanding of how crop production responds to intermittent O-3 exposure.

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