DOI: 10.1111/gcb.13853
Scopus记录号: 2-s2.0-85040623436
论文题名: Peaks of in situ N2O emissions are influenced by N2O-producing and reducing microbial communities across arable soils
作者: Domeignoz-Horta L.A. ; Philippot L. ; Peyrard C. ; Bru D. ; Breuil M.-C. ; Bizouard F. ; Justes E. ; Mary B. ; Léonard J. ; Spor A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 1 起始页码: 360
结束页码: 370
语种: 英语
英文关键词: agroecosystems
; denitrification
; greenhouse gas
; land use
; microbial diversity
; nitrification
; nitrogen cycling
; tillage
Scopus关键词: agricultural ecosystem
; agricultural practice
; arable land
; denitrification
; emission
; greenhouse gas
; land use
; microbial community
; nitrification
; nitrogen cycle
; nitrogen dioxide
; nitrous oxide
; soil nitrogen
; tillage
; Bacteria (microorganisms)
; nitrous oxide
; agriculture
; bacterium
; chemistry
; classification
; denitrification
; metabolism
; microbiology
; nitrification
; Agriculture
; Bacteria
; Denitrification
; Nitrification
; Nitrous Oxide
; Soil Microbiology
英文摘要: Agriculture is the main source of terrestrial N2O emissions, a potent greenhouse gas and the main cause of ozone depletion. The reduction of N2O into N2 by microorganisms carrying the nitrous oxide reductase gene (nosZ) is the only known biological process eliminating this greenhouse gas. Recent studies showed that a previously unknown clade of N2O-reducers (nosZII) was related to the potential capacity of the soil to act as a N2O sink. However, little is known about how this group responds to different agricultural practices. Here, we investigated how N2O-producers and N2O-reducers were affected by agricultural practices across a range of cropping systems in order to evaluate the consequences for N2O emissions. The abundance of both ammonia-oxidizers and denitrifiers was quantified by real-time qPCR, and the diversity of nosZ clades was determined by 454 pyrosequencing. Denitrification and nitrification potential activities as well as in situ N2O emissions were also assessed. Overall, greatest differences in microbial activity, diversity, and abundance were observed between sites rather than between agricultural practices at each site. To better understand the contribution of abiotic and biotic factors to the in situ N2O emissions, we subdivided more than 59,000 field measurements into fractions from low to high rates. We found that the low N2O emission rates were mainly explained by variation in soil properties (up to 59%), while the high rates were explained by variation in abundance and diversity of microbial communities (up to 68%). Notably, the diversity of the nosZII clade but not of the nosZI clade was important to explain the variation of in situ N2O emissions. Altogether, these results lay the foundation for a better understanding of the response of N2O-reducing bacteria to agricultural practices and how it may ultimately affect N2O emissions. © 2017 Her Majesty the Queen in Right of Canada Global Change Biology © 2017 John Wiley & Sons Ltd. Reproduced with the permission of the Minister of INRA Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110627
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Agroécologie, AgroSup Dijon, INRA, Université Bourgogne Franche-Comté, Dijon, France; INRA, UR1158, AgroImpact, Laon, France; AGIR, INPT, INP-PURPAN, INRA, Université de Toulouse, Toulouse, France
Recommended Citation:
Domeignoz-Horta L.A.,Philippot L.,Peyrard C.,et al. Peaks of in situ N2O emissions are influenced by N2O-producing and reducing microbial communities across arable soils[J]. Global Change Biology,2018-01-01,24(1)