DOI: 10.1016/j.scitotenv.2020.136648
论文题名: Nitrous oxide fluxes of a boreal abandoned pasture do not significantly differ from an adjacent natural bog despite distinct environmental conditions
作者: Vogt J. ; Wu J. ; Altdorff D. ; Ba Le T. ; Gong Y.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 714 语种: 英语
英文关键词: C/N ratio
; Drained peatland
; Land-use change
; N2O
; Pasture
; Static chamber
Scopus关键词: Agriculture
; Greenhouse gases
; Groundwater
; Land use
; Nitrogen
; Nitrogen oxides
; Organic carbon
; Population statistics
; Soil pollution
; C/N ratio
; Land-use change
; Pasture
; Peatland
; Static chambers
; Wetlands
; dissolved organic matter
; nitrogen
; nitrous oxide
; organic carbon
; water
; abandoned land
; bog
; carbon
; comparative study
; environmental conditions
; growing season
; land use change
; nitrogen dioxide
; nitrous oxide
; pasture
; peatland
; agricultural management
; Article
; chemical composition
; comparative study
; concentration (parameter)
; controlled study
; ecosystem
; environmental factor
; environmental monitoring
; environmental parameters
; environmental temperature
; flux assay
; food industry
; greenhouse gas
; hydrological model
; land drainage
; land use
; limit of quantitation
; Newfoundland and Labrador
; nitrogen availability
; nitrous oxide emission
; pastureland
; peatland
; photosynthetic rate
; population growth
; primary production (biomass)
; priority journal
; soil analysis
; soil fertilization
; soil moisture
; soil temperature
; synthesis
; vegetation
; water table
; water temperature
英文摘要: Land-use conversion of pristine boreal peatlands for agricultural purposes is an ongoing process and projected to become more intensive with rising population growth and increased demands for food production. However, agricultural use of peatlands affects the production and emission of nitrous oxide (N2O), a very potent greenhouse gas currently gaining more attention in the global assessment of greenhouse gases. While the intensity of N2O emissions depends on a range of environmental factors, including hydrological parameters, temperature and the availability of nitrogen in soils, key driving processes remain poorly understood. In order to understand the effects of land-use change on the peatland ecosystem, we quantified N2O fluxes under different land-use in a comparative study between a natural bog and an adjacent abandoned pasture in Newfoundland, Canada. We conducted in situ gas flux measurements using the static chamber method over five growing seasons. In addition, we measured photosynthetic rates and environmental parameters, namely soil temperature and moisture, water table and concentrations of total nitrogen and dissolved organic carbon in pore waters. According to previous studies, we hypothesized higher N2O emissions from the abandoned pasture due to drainage compared to the natural bog. However, despite significant differences of environmental parameters and photosynthetic rates, we found no significant difference of N2O fluxes between the two sites. We argue that N2O production at the abandoned pasture was inhibited due to exhaustion of plant-available nitrogen as a result of increased gross primary production compared to the natural bog. We conclude that the effect of drainage and fertilization on N2O fluxes during the growing season was superposed by vegetation composition change effects at the abandoned pasture, leading to similar N2O fluxes at both sites. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158363
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Environment and Sustainability, Memorial University of Newfoundland, School of Science and the Environment, Corner Brook, NL A2H 5G4, Canada; Graduate Program in Environmental Science, Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada; School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, NL A2H 5G4, Canada
Recommended Citation:
Vogt J.,Wu J.,Altdorff D.,et al. Nitrous oxide fluxes of a boreal abandoned pasture do not significantly differ from an adjacent natural bog despite distinct environmental conditions[J]. Science of the Total Environment,2020-01-01,714