Yao, Zhisheng1; Wang, Rui1; Zheng, Xunhua1,2; Mei, Baoling1,5; Zhou, Zaixing1,6; Xie, Baohua1,7
; Dong, Haibo1,8; Liu, Chunyan1; Han, Shenghui1; Xu, Zhongjun1,9; Butterbach-Bahl, Klaus1,3; Zhu, Jianguo4发表期刊GLOBAL CHANGE BIOLOGY
ISSN1354-1013
2020-11-15
页码13
关键词climate changeelevated CO2FACEgreenhouse gas fluxesN surplusnitrous oxiderice
DOI10.1111/gcb.15410
通讯作者Yao, Zhisheng(zhishengyao@mail.iap.ac.cn); Wang, Rui(wangrui@mail.iap.ac.cn)
英文摘要Increasing levels of atmospheric CO2 are expected to enhance crop yields and alter soil greenhouse gas fluxes from rice paddies. While elevated CO2 (ECO2) effects on CH4 emissions from rice paddies have been studied in some detail, little is known howECO2 might affect N2O fluxes or yield-scaled emissions. Here, we report on a multi-site, multi-year in-situ FACE (free-air CO2 enrichment) study, aiming to determine N2O fluxes and crop yields from Chinese subtropical rice systems as affected byECO2. In this study, we tested various N fertilization and residue addition treatments, with rice being grown under eitherECO2 (+200 mu mol/mol) or ambient control. Across the six site-years, rice straw and grain yields underECO2 were increased by 9%-40% for treatments fertilized with >= 150 kg N/ha, while seasonal N2O emissions were decreased by 23%-73%. Consequently, yield-scaled N2O emissions were significantly lower underECO2. For treatments receiving insufficient fertilization (<= 125 kg N/ha), however, no significantECO2 effects on N2O emissions were observed. The mitigating effect ofECO2 upon N2O emissions is closely associated with plant N uptake and a reduction of soil N availability. Nevertheless, increases in yield-scaled N2O emissions with increasing N surplus suggest that N surplus is a useful indicator for assessing N2O emissions from rice paddies. Our findings indicate that with rising atmospheric CO2 soil N2O emissions from rice paddies will decrease, given that the farmers' N fertilization is usually sufficient for crop growth. The expected decrease in N2O emissions was calculated to compensate 24% of the simultaneously observed increase in CH4 emissions underECO2. This shows that for an agronomic and environmental assessment ofECO2 effects on rice systems, not only CH4 emissions, but also N2O fluxes and yield-scaled emissions need to be considered for identifying most climate-friendly and economically viable options for future rice production.
资助机构Chinese Academy of Sciences; National Natural Science Foundation of China
收录类别SCI
语种英语
关键词[WOS]NITROUS-OXIDE EMISSIONS; CARBON-DIOXIDE CONCENTRATION; ENRICHMENT FACE; SEASONAL-CHANGES; PADDY FIELDS; SOIL-C; BIOMASS PRODUCTION; SHORTGRASS STEPPE; GROWING-SEASON; GRASS SWARDS
研究领域[WOS]Biodiversity & Conservation; Environmental Sciences & Ecology
WOS记录号WOS:000589173900001
引用统计被引频次：4[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/28330
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
通讯作者Yao, Zhisheng; Wang, Rui作者单位1.Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Environm Res, Garmisch Partenkirchen, Germany
4.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Nanjing Inst Soil Sci, Nanjing, Peoples R China
5.Inner Mongolia Univ, Sch Ecol & Environm, Hohhot, Peoples R China
6.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA
7.Chinese Acad Sci, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai Inst Coastal Zone Res, Yantai, Peoples R China
8.Guangdong Acad Sci, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangdong Inst Ecoenvironm Sci & Technol, Guangzhou, Peoples R China
9.Beijing Univ Chem Technol, Dept Environm Sci & Engn, Beijing, Peoples R China
推荐引用方式
GB/T 7714Yao, Zhisheng,Wang, Rui,Zheng, Xunhua,et al. Elevated atmospheric CO2 reduces yield-scaled N2O fluxes from subtropical rice systems: Six site-years field experiments[J]. GLOBAL CHANGE BIOLOGY,2020:13.
APAYao, Zhisheng.,Wang, Rui.,Zheng, Xunhua.,Mei, Baoling.,Zhou, Zaixing.,...&Zhu, Jianguo.(2020).Elevated atmospheric CO2 reduces yield-scaled N2O fluxes from subtropical rice systems: Six site-years field experiments.GLOBAL CHANGE BIOLOGY,13.
MLAYao, Zhisheng,et al."Elevated atmospheric CO2 reduces yield-scaled N2O fluxes from subtropical rice systems: Six site-years field experiments".GLOBAL CHANGE BIOLOGY (2020):13.
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