Indirect N2O emissions with seasonal variations from an agricultural drainage ditch mainly receiving interflow water

doi:10.1016/j.envpol.2018.07.018

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Indirect N2O emissions with seasonal variations from an agricultural drainage ditch mainly receiving interflow water
	Tian, Linlin1,2,3,4 ; Akiyama, Hiroko 4; Zhu, Bo1,2 ; Shen, Xi 1,2
刊名	ENVIRONMENTAL POLLUTION
	2018-11-01
卷号	242 页码:480-491
关键词	Nitrous oxide (N2O) Indirect NO emission factor (EF5g) Intensive precipitation Nitrate Leaching Drainage ditch
ISSN号	0269-7491
DOI	10.1016/j.envpol.2018.07.018
英文摘要	Nitrogen (N)-enriched leaching water may act as a source of indirect N2O emission when it is discharged to agricultural drainage ditches. In this study, indirect N2O emissions from an agricultural drainage ditch mainly receiving interflow water were measured using the static chamber-gas chromatography technique during 2012-2015 in the central Sichuan Basin in southwestern China. We found the drainage ditch was a source of indirect N2O emissions contributing an inter-annual mean flux of 6.56 +/- 1.12 mu g N m(-2) h(-1) and a mean indirect N2O emission factor (EF5g) value of 0.03 +/- 0.003%. The mean EF5g value from literature review was 0.51%, which was higher than the default EF5g value (0.25%) proposed by the Intergovernmental Panel on Climate Change (IPCC) in 2006. Our study demonstrated that, more in situ observations of N2O emissions as regards N leaching are required, to account for the large variation in EF5g values and to improve the accuracy and confidence of the default EF5g value. Indirect N2O emissions varied with season, higher emissions occurred in summer and autumn. These seasonal variations were related to drainage water NO3--N concentration, temperature, and precipitation. Our results showed that intensive precipitation increased NO3--N concentrations and N2O emissions, and when combined with warmer water temperatures, these may have increased the denitrification rate that led to the higher summer and autumn N2O emissions in the studied agricultural drainage ditch. (C) 2018 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000446150300052
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23988]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Zhu, Bo
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, 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
推荐引用方式 GB/T 7714	Tian, Linlin,Akiyama, Hiroko,Zhu, Bo,et al. Indirect N2O emissions with seasonal variations from an agricultural drainage ditch mainly receiving interflow water[J]. ENVIRONMENTAL POLLUTION,2018,242:480-491.
APA	Tian, Linlin,Akiyama, Hiroko,Zhu, Bo,&Shen, Xi.(2018).Indirect N2O emissions with seasonal variations from an agricultural drainage ditch mainly receiving interflow water.ENVIRONMENTAL POLLUTION,242,480-491.
MLA	Tian, Linlin,et al."Indirect N2O emissions with seasonal variations from an agricultural drainage ditch mainly receiving interflow water".ENVIRONMENTAL POLLUTION 242(2018):480-491.