Effects of free-air temperature increase on grain yield and greenhouse gas emissions in a double rice cropping system
文献类型： 外文期刊
作者： Wang, Haiyuan 1 ; Yang, Taotao 2 ; Chen, Ji 3 ; Bell, Stephen M. 6 ; Wu, Siping 1 ; Jiang, Yu 7 ; Sun, Yanni 1 ; Zeng, Yanhua 1 ; Zeng, Yongjun 1 ; Pan, Xiaohua 1 ; Huang, Shan 1 ;
作者机构： 1.Jiangxi Agr Univ, Minist Educ, Key Lab Crop Physiol Ecol & Genet Breeding, Nanchang 330045, Jiangxi, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China
3.Aarhus Univ, Ctr Circular Bioecon, Dept Agroecol, Blichers Alle 20, DK-8830 Tjele, Denmark
4.Aarhus Univ, Ctr Circular Bioecon, DK-8830 Tjele, Denmark
5.Aarhus Univ, iCLIMATE Interdisciplinary Ctr Climate Change, DK-4000 Roskilde, Denmark
6.Univ Autonoma Barcelona UAB, Inst Environm Sci & Technol ICTA, Bellaterra 08193, Spain
7.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Peoples R China
关键词： Climate warming; Food security; Methane; Nitrous oxide; Global warming potential
期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.145； 五年影响因子：7.234 ）
ISSN： 0378-4290
年卷期： 2022 年 281 卷
页码：
收录情况： SCI
摘要： The responses of grain yield and greenhouse gas (GHG) emissions to climate warming in rice paddies are serious concerns for both global food security and climate change mitigation. However, the impact of free-air temperature increase (FATI) on grain yield and methane (CH4) and nitrous oxide (N2O) emissions remains unclear for one of the most globally significant rice production practices: the double rice cropping system. Here, we con-ducted a two-year field experiment to examine the effect of FATI by infrared heaters on grain yield and CH4 and N2O emissions in a double rice field in subtropical China. FATI increased rice canopy temperature by 2.0 degrees C and soil temperature by 1.2 degrees C on average but had no effect on either early or late rice yield production. FATI did not affect CH4 emissions, but significantly increased N2O emissions in both the early and late rice seasons. Averaged across two years, N2O emissions increased by 0.3 kg ha(-1) and 0.7 kg ha(-1) in the warmed plots for the early and late rice seasons, respectively. Consequently, FATI enhanced the global warming potential (GWP) and GHG intensity (i.e., yield scaled GWP) in the double rice cropping system. In addition, warming increased the abundance of ammoniaoxidising bacteria, ammoniaoxidising archaea, and a nitrite reductase gene (nirS), but decreased that of a nitrous oxide reductase gene (nosZ). Our results indicate that warming by FATI does not affect grain yield and CH4 emissions but stimulates N2O emissions in the double rice cropping system and therefore promotes a potential positive feedback with future climate warming.
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