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Simulating denitrification and nitrous oxide emissions from subtropical maize-winter wheat rotations in Southwestern China using NOEv2 model
Gu, Jiangxin1; Xiang, Hongyan2,3; Kuang, Fuhong2; Hao, Yaoxu1; Qu, Dong1; Zhu, Bo2
Corresponding AuthorGu, Jiangxin
2016-08-16
Source PublicationAGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
Volume230Pages:127-138
SubtypeArticle
AbstractWe measured denitrification and nitrous oxide (N2O) emissions from subtropical maize-winter wheat cropping systems in the Sichuan Basin, Southwestern China between 2005 and 2006, providing a dataset that enabled us to comprehensively test the non-linear empirical NOEv2 model. The primary aims were to (i) quantify annual denitrification and N2O emissions from intensively managed agroecosystems, (ii) parameterize the denitrification sub-model in NOEv2 with site-specific measurements and incubations and (iii) evaluate NOEv2 in a subtropical area in particular. Field measurements were conducted at two adjacent sites (hereaftdr named NR and NF, respectively). At site NR, soils were fertilized with urea at 150 (NR-150) and 250 (NR-250) kg N ha(-1) crop(-1). At site NF, soils were fertilized with urea (NF-U), ammonium sulphate (NF-AS) and potassium nitrate (NF-KN) at 150 kg N ha(-1) crop(-1). Set-aside soils were incubated in laboratory to determine two biological parameters of the NOEv2 model namely the potential denitrification rate (D-p) and the maximal fraction of N2O production through denitrification (r(max)). With respect to subtropical climate, we modified the response function linked to soil temperature using an equation based on temperature sensitivity (Q(10)). The incubated D-p and r(max) were 2.96 kg N ha(-1) d(-1) and 0.60, respectively. A Q(10) value of 2.95 was estimated from the exponential relationship between soil heterotrophic respiration rates and soil temperature (5 cm depth) throughout the experimental period (r(2) = 0.84, n = 96, p = 0.000). Varying across the treatments, the observed and simulated denitrification rates ranged from 10.95 to 1538 and from 12.47 to 14.91 kg N ha(-1) yr(-1), respectively. The simulations were averagely 3% larger than the observations (ranging from -20 to 27%). Accordingly, the observed and simulated N2O emissions ranged from 1.45 to 2.72 and from 1.38 to 2.21 kg N ha(-1) yr(-1), respectively. The simulations were averagely 9% lower than the observations (ranging from -19 to 7%). We conclude that NOEv2 is applicable to the studied subtropical area with site-specific parameterization. Modification of the response function linked to soil temperature seems essential to apply the model to a wide range of climate conditions. (C) 2016 Elsevier B.V. All rights reserved.
KeywordAcetylene Inhibition Agricultural Soil Non-linear Empirical Model Static Chamber Subtropical Area Temperature Dependence
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.agee.2016.05.034
WOS Subject ExtendedAgriculture ; Environmental Sciences & Ecology
Indexed BySCI
WOS KeywordFILLED PORE-SPACE ; N2O EMISSIONS ; CENTRAL FRANCE ; FIELD-SCALE ; SOIL ; TEMPERATURE ; MANAGEMENT ; WATER ; NITRIFICATION ; FERTILIZATION
Language英语
WOS SubjectAgriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS IDWOS:000381834500014
Funding OrganizationNational Natural Science Foundation of China(41475128) ; Chinese Academy of Sciences(Y2R1010013) ; Chinese Universities Scientific Fund(2014YB063)
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17604
Collection山地表生过程与生态调控重点实验室
Affiliation1.Northwest A&F Univ, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agri Environm Northwest Chin, Minist Agr, Yangling 712100, Peoples R China
2.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
3.Chongqing Int Investment Consultat Grp Co Ltd, Chongqing 400020, Peoples R China
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Gu, Jiangxin,Xiang, Hongyan,Kuang, Fuhong,et al. Simulating denitrification and nitrous oxide emissions from subtropical maize-winter wheat rotations in Southwestern China using NOEv2 model[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2016,230:127-138.
APA Gu, Jiangxin,Xiang, Hongyan,Kuang, Fuhong,Hao, Yaoxu,Qu, Dong,&Zhu, Bo.(2016).Simulating denitrification and nitrous oxide emissions from subtropical maize-winter wheat rotations in Southwestern China using NOEv2 model.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,230,127-138.
MLA Gu, Jiangxin,et al."Simulating denitrification and nitrous oxide emissions from subtropical maize-winter wheat rotations in Southwestern China using NOEv2 model".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 230(2016):127-138.
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