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Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation
Zhou, Wei1; Lin, Shan1; Wu, Lei1; Zhao, Jingsong1; Wang, Milan1; Zhu, Bo2; Mo, Yongliang3; Hu, Ronggui1; Chadwick, Dave4; Shaaban, Muhammad1
2017-12-01
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
Volume170Pages:269-278
AbstractWinter-flooded paddy is a typical rice-based cropping system to conserve water for the next rice growing season. Conversion of winter-flooded paddy to rice-wheat rotation has been widely adopted with the development of the water conservation infrastructure and the government's encouragement of winter agriculture in China in recent decades. However, the effects of this conversion on N2O emission are still not clear. Three winter-flooded paddy fields were studied in a split-plot design. One-half of each field was converted to rice-wheat rotation (RW), and the other half remained winter-flooded as rice-fallow (RF). Each plot of RW and RF was further divided into four subplots: three subplots for conventional N fertilizer application (RW-N-c and RF-N-c) and one for unfertilized treatment (RW-N-0 and RF-N-0). Conversion of RF-Nc to RW-Nc increased the N2O emission up to 6.6-fold in the first year and 4.4-fold in the second year. Moreover, N2O emissions for the entire wheat season were 1.74-3.74 kg N ha(-1) and 0.24-0.31 kg N ha(-1) from RW-Nc and RW-N-0, respectively, and accounted for 78%-94% and 78%-97% of the total annual amount. N2O emitted during the first 11-21 days of the wheat season from RW-Nc was 1.48-3.28 kg N ha(-1) and that from RW-N-0 was 0.14-0.17 kg N ha(-1), which contributed to 66%-82% and 45%-71% of the total annual amount, respectively. High N2O fluxes occurred when the soil water-filled pore space (WFPS) was in the range of 68%-72% and the ratio of available carbon to nitrogen in the soil was <1.42. The contribution of WFPS and dissolved organic carbon (DOC) explained most of the variation of the N2O fluxes compared with the other measured environmental and soil factors. These findings suggest that the conversion of winter-flooded paddy to rice-wheat rotation increased N2O emissions that could be mitigated by controlling the soil moisture and ratio of available soil carbon to nitrogen. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordWinter-flooded paddy Rice-wheat rotation N2O emission Water-filled pore space Dissolved organic carbon
DOI10.1016/j.atmosenv.2017.09.021
WOS KeywordNITROUS-OXIDE EMISSIONS ; 3-YEAR FIELD MEASUREMENT ; NO-TILLAGE ; CONVENTIONAL-TILLAGE ; CROPPING SYSTEMS ; ORGANIC-CARBON ; NITRIC-OXIDE ; SOIL ; CHINA ; NITRATE
Language英语
Funding ProjectNational Program on Key Basic Research Project of China[2012CB417106] ; Fundamental Research Fund for the Central Universities[2662016PY098] ; UK-China Virtual Joint Centre for Agricultural Nitrogen (CINAg) - Newton Fund via UK BBSRC/NERC[BB/N013468/1]
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000415772800024
Funding OrganizationNational Program on Key Basic Research Project of China ; Fundamental Research Fund for the Central Universities ; UK-China Virtual Joint Centre for Agricultural Nitrogen (CINAg) - Newton Fund via UK BBSRC/NERC
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20654
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorHu, Ronggui
Affiliation1.Huazhong Agr Univ, Coll Resources & Environm, Key Lab Arable Land Conservat Middle & Lower Reac, Minist Agr, Wuhan 430070, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
4.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales
Recommended Citation
GB/T 7714
Zhou, Wei,Lin, Shan,Wu, Lei,et al. Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation[J]. ATMOSPHERIC ENVIRONMENT,2017,170:269-278.
APA Zhou, Wei.,Lin, Shan.,Wu, Lei.,Zhao, Jingsong.,Wang, Milan.,...&Shaaban, Muhammad.(2017).Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation.ATMOSPHERIC ENVIRONMENT,170,269-278.
MLA Zhou, Wei,et al."Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation".ATMOSPHERIC ENVIRONMENT 170(2017):269-278.
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