Intermittent flooding lowers the impact of elevated atmospheric CO2 on CH4 emissions from rice paddies

文献类型： 外文期刊

第一作者： Qian, Haoyu

作者： Qian, Haoyu;Zhu, Xiangchen;Liu, Yunlong;Ding, Yanfeng;Jiang, Yu;Chen, Jin;Zhu, Xiangchen;Wang, Ling;Liu, Yunlong;Zhang, Jun;Deng, Aixing;Song, Zhenwei;Zhang, Weijian;van Groenigen, Kees Jan

作者机构：

关键词： Climate change; Greenhouse gas; Methanogens; Methanotrophs

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：6.576； 五年影响因子：7.088 ）

ISSN： 0167-8809

年卷期： 2022 年 329 卷

页码：

收录情况： SCI

摘要： Atmospheric CO2 concentrations and water management practices both affect greenhouse gas (GHG) emissions from rice paddies, but interactive effects between these two factors are still unknown. Here, we show the first study to compare the impact of elevated atmospheric CO2 (eCO(2)) on GHG emissions under continuously flooded irrigation (CF) and under intermittently flooded (IF) conditions. Elevated CO2 stimulated CH4 emissions under CF by 50% in a field experiment and by 46% in a pot experiment, but it had no effect under IF in both experiments. Elevated CO2 had no effect on N2O emissions in either the field or pot experiment. Rice root biomass, aboveground biomass and grain yield increased with eCO(2), but were not affected by water management. Elevated CO2 only stimulated the abundance of methanogens under CF, suggesting that increased soil O-2 availability with IF limited methanogenic activity under eCO(2). Our findings suggest that estimates of CH4 emissions from global rice agriculture with eCO(2) need to account for recent changes in water management.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序