DOI: 10.1016/j.atmosenv.2017.06.030
Scopus记录号: 2-s2.0-85021084457
论文题名: Nitrogen soil emissions and belowground plant processes in Mediterranean annual pastures are altered by ozone exposure and N-inputs
作者: Sánchez-Martín L ; , Bermejo-Bermejo V ; , García-Torres L ; , Alonso R ; , de la Cruz A ; , Calvete-Sogo H ; , Vallejo A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 165 起始页码: 12
结束页码: 22
语种: 英语
英文关键词: Global change
; Grasslands
; Greenhouse gases
; N-deposition
; O3 effects
Scopus关键词: Agriculture
; Atmospheric structure
; Carbon dioxide
; Deposition
; Gas emissions
; Greenhouse gases
; Microorganisms
; Nitrogen
; Organic carbon
; Ozone
; Soils
; Cumulative emissions
; Dissolved organic carbon
; Global change
; Grasslands
; Microorganism activity
; N deposition
; Physiological activity
; Soil microbial activities
; Soil pollution
; carbon dioxide
; methane
; nitric oxide
; nitrogen
; nitrous oxide
; organic carbon
; ozone
; atmospheric deposition
; belowground production
; global change
; grass
; grassland
; greenhouse gas
; Mediterranean environment
; microbial activity
; microbial community
; nitrogen
; open-top chamber
; ozone
; pasture
; pollution effect
; soil emission
; troposphere
; air pollution
; Article
; biomass production
; controlled study
; grassland
; growing season
; nitrogen deposition
; nitrous oxide emission
; nonhuman
; nutrient content
; pasture
; plant
; plant root
; priority journal
; seasonal variation
; soil
; soil microflora
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Increasing tropospheric ozone (O3) and atmospheric nitrogen (N) deposition alter the structure and composition of pastures. These changes could affect N and C compounds in the soil that in turn can influence soil microbial activity and processes involved in the emission of N oxides, methane (CH4) and carbon dioxide (CO2), but these effects have been scarcely studied. Through an open top chamber (OTC) field experiment, the combined effects of both pollutants on soil gas emissions from an annual experimental Mediterranean community were assessed. Four O3 treatments and three different N input levels were considered. Fluxes of nitric (NO) and nitrous (N2O) oxide, CH4 and CO2 were analysed as well as soil mineral N and dissolved organic carbon. Belowground plant parameters like root biomass and root C and N content were also sampled. Ozone strongly increased soil N2O emissions, doubling the cumulative emission through the growing cycle in the highest O3 treatment, while N-inputs enhanced more slightly NO; CH4 and CO2 where not affected. Both N-gases had a clear seasonality, peaking at the start and at the end of the season when pasture physiological activity is minimal; thus, higher microorganism activity occurred when pasture had a low nutrient demand. The O3-induced peak of N2O under low N availability at the end of the growing season was counterbalanced by the high N inputs. These effects were related to the O3 x N significant interaction found for the root-N content in the grass and the enhanced senescence of the community. Results indicate the importance of the belowground processes, where competition between plants and microorganisms for the available soil N is a key factor, for understanding the ecosystem responses to O3 and N. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82604
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry and Food Technology, ETSI Agrónomos, Universidad Politécnica de Madrid, Avda. Puerta de Hierro, 2, Madrid, Spain; Ecotoxicology of Air Pollution, CIEMAT, Avda. Complutense 40, Madrid, Spain
Recommended Citation:
Sánchez-Martín L,, Bermejo-Bermejo V,, García-Torres L,et al. Nitrogen soil emissions and belowground plant processes in Mediterranean annual pastures are altered by ozone exposure and N-inputs[J]. Atmospheric Environment,2017-01-01,165