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	Fertilizer-induced emission factors and background emissions of N2O from vegetable fields in China
	Wang, Jinyang1; Xiong, Zhengqin1,2; Yan, Xiaoyuan2
刊名	ATMOSPHERIC ENVIRONMENT
	2011-12-01
卷号	45期号:38页码:6923-6929
关键词	N2O budget Model estimation Vegetable cultivation Cropping system Climate change
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2011.09.045
通讯作者	Xiong, Zhengqin(zqxiong@njau.edu.cn)
英文摘要	The estimation of nitrous oxide (N2O) emissions based on specific cropping systems is important for accurate national N2O budgets. Intensively managed vegetable cultivation is responsible for large N2O emissions in mainland China. However, little information can be obtained on the nationwide estimation of direct N2O emissions from vegetable fields. Estimates of fertilizer-induced direct N2O emissions from vegetable fields in mainland China were thus obtained by compiling and analyzing reported data in peer-reviewed journals and research reports. The results indicated that the seasonal N2O emissions from vegetable fields significantly increased with nitrogen (N) fertilizer application (p < 0.0001). According to the ordinary least squares (OLS) model, the fertilizer-induced emission factor (EF) and background emissions of N2O were estimated to be 0.55 +/- 0.05% and 1.067 +/- 0.277 kg N ha(-1) yr(-1), respectively. The EF was reduced and the background emission of N2O increased when the measurement duration was prolonged from <= 100 d to >100 and <= 200 d. Comparable results were obtained by the maximum likelihood (ML) model, with an EF of 0.49 +/- 0.06% and background N2O emissions of 1.228 +/- 0.189 kg N ha(-1) yr(-1). Based on the OLS-derived parameters, the fertilizer-induced direct emissions and background emissions of N2O were estimated to be 66.95 Gg N and 19.63 Gg N, respectively, in 2009, and the annual N2O emissions were much higher in the provinces of Shandong, Henan, Hebei and Sichuan. The estimated N2O emissions from vegetable fields accounted for 21.4% of the total direct N2O emissions from Chinese croplands, with large uncertainties. Therefore, the EF and background emissions of N2O for each cropping system, particularly for intensively managed vegetable fields, should be specifically determined for accurate national N2O inventories. (C) 2011 Published by Elsevier Ltd.
收录类别	SCI
WOS关键词	NITROUS-OXIDE EMISSIONS ; ORGANIC-CARBON ; CROPPING SYSTEM ; SOIL CARBON ; CROPLANDS ; SEQUESTRATION ; AGRICULTURE ; IMPACTS ; FLUX ; ASIA
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000297488900011
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558962
专题	南京土壤研究所
通讯作者	Xiong, Zhengqin
作者单位	1.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Key Lab Low Carbon Agr & GHGs Mitigat, Nanjing 210095, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jinyang,Xiong, Zhengqin,Yan, Xiaoyuan. Fertilizer-induced emission factors and background emissions of N2O from vegetable fields in China[J]. ATMOSPHERIC ENVIRONMENT,2011,45(38):6923-6929.
APA	Wang, Jinyang,Xiong, Zhengqin,&Yan, Xiaoyuan.(2011).Fertilizer-induced emission factors and background emissions of N2O from vegetable fields in China.ATMOSPHERIC ENVIRONMENT,45(38),6923-6929.
MLA	Wang, Jinyang,et al."Fertilizer-induced emission factors and background emissions of N2O from vegetable fields in China".ATMOSPHERIC ENVIRONMENT 45.38(2011):6923-6929.

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