IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Seasonal variations in indirect N2O emissions from an agricultural headwater ditch
Tian, Linlin1,2,3,4; Zhu, Bo1,2; Akiyama, Hiroko4
Corresponding AuthorBo Zhu
2017
Source PublicationBIOLOGY AND FERTILITY OF SOILS
ISSN0178-2762
EISSN1432-0789
Volume53Issue:6Pages:651-662
SubtypeArticle
Abstract

Agricultural headwater ditches are an important source of indirect agricultural nitrous oxide (N2O) emissions, but their contribution is difficult to quantify. In the present study, the static chamber-gas chromatography technique was used for measurement of N2O emissions from vegetated (V, the whole ditch ecosystem) and non-vegetated (NV, the sediment-water interface only) zones in an agricultural headwater ditch in the Central Sichuan Basin in Southwestern China during 2014-2015. Annual N2O emissions from the agricultural headwater ditch were similar to direct N2O emissions from an adjacent N-fertilized purple soil cropland, suggesting nitrogen (N)-enriched ditches are important anthropogenic N2O sources. Mean cumulative N2O emissions during summer and autumn were higher than those in spring and winter. Overlying water nitrate (NO3 (-)-N) concentration and sediment-water interface temperature were primary factors affecting seasonal N2O emissions. Heavy precipitation transported NO3 (-)-N from cropland and increase NO3 (-)-N in the agricultural headwater ditch water, and subsequently stimulate N2O emissions. A literature review of EF5r (the indirect N2O emission factor for rivers) revealed a mean value of 0.23%, similar to our values (0.27%), and also the default value (0.25%) proposed by the Intergovernmental Panel on Climate Change. The number of studies on indirect N2O emissions remains limited, and more in situ measurements are needed to have more accurate values of EF5r.

KeywordNitrous Oxide Indirect Emission Inorganic Nitrogen Sediment Overlying Water Heavy Precipitation
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s00374-017-1207-z
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordNITROUS-OXIDE EMISSION ; STREAM DENITRIFICATION ; SICHUAN BASIN ; CHINA ; RIVER ; NITRATE ; TRANSPORT ; SOIL ; FLUXES ; WATER
Language英语
Quartile1区
TOP
WOS SubjectSoil Science
WOS IDWOS:000405779500006
Funding OrganizationNational Program on Key Basic Research Projects of China(2012CB417101) ; National Natural Science Foundation of China(41271321)
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18880
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Natl Agr & Food Res Org, Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Tian, Linlin,Zhu, Bo,Akiyama, Hiroko. Seasonal variations in indirect N2O emissions from an agricultural headwater ditch[J]. BIOLOGY AND FERTILITY OF SOILS,2017,53(6):651-662.
APA Tian, Linlin,Zhu, Bo,&Akiyama, Hiroko.(2017).Seasonal variations in indirect N2O emissions from an agricultural headwater ditch.BIOLOGY AND FERTILITY OF SOILS,53(6),651-662.
MLA Tian, Linlin,et al."Seasonal variations in indirect N2O emissions from an agricultural headwater ditch".BIOLOGY AND FERTILITY OF SOILS 53.6(2017):651-662.
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