DOI: 10.1016/j.atmosenv.2017.11.025
Scopus记录号: 2-s2.0-85034423842
论文题名: Subsurface watering resulted in reduced soil N2O and CO2 emissions and their global warming potentials than surface watering
作者: Wei Q ; , Xu J ; , Yang S ; , Liao L ; , Jin G ; , Li Y ; , Hameed F
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 173 起始页码: 248
结束页码: 255
语种: 英语
英文关键词: CO2
; Comprehensive emissions
; Greenhouse effect
; N2O
; Subsurface watering
Scopus关键词: Carbon
; Carbon dioxide
; Global warming
; Greenhouse effect
; Greenhouses
; Moisture
; Nitrogen oxides
; Soil moisture
; Soils
; Water management
; Carbon dioxide emissions
; GHGs emissions
; Global warming potential
; Greenhouse gases (GHG)
; Pulse emissions
; Reduced soils
; Soil micro-organisms
; Subsurface watering
; Greenhouse gases
; carbon dioxide
; nitrous oxide
; soil water
; carbon dioxide
; carbon emission
; emission
; global warming
; greenhouse effect
; nitrous oxide
; soil microorganism
; soil water
; Article
; carbon footprint
; gas
; greenhouse effect
; priority journal
; sampling
; soil
; soil microflora
; soil moisture
; subsurface watering
; temperature
; water management
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: Water management is an important practice with significant effect on greenhouse gases (GHG) emission from soils. Nitrous oxide (N2O) and carbon dioxide (CO2) emissions and their global warming potentials (GWPs) from subsurface watering soil (SUW) were investigated, with surface watering (SW) as a control. Results indicated that the N2O and CO2 emissions from SUW soils were somewhat different to those from SW soil, with the peak N2O and CO2 fluxes from SUW soil reduced by 28.9% and 19.4%, and appeared 72 h and 168 h later compared with SW. The fluxes of N2O and CO2 from SUW soils were lower than those from SW soil in both pulse and post-pulse periods, and the reduction was significantly (p<0.05) in pulse period. Compare to SW, the cumulative N2O and CO2 emissions and its integrative GWPs from SUW soil decreased by 21.0% (p<0.05), 15.9% and 18.0%, respectively. The contributions of N2O to GWPs were lower than those of CO2 during most of time, except in pulse emission periods, and the proportion of N2O from SUW soil was 1.4% (p>0.1) lower that from SW soil. Moreover, N2O and CO2 fluxes from both watering treatments increased exponentially with increase of soil water-filled pore space (WFPS) and temperature. Our results suggest that watering soil from subsurface could significantly reduce the integrative greenhouse effect caused by N2O and CO2 and is a promising strategy for soil greenhouse gases (GHGs) mitigation. And the pulse period, contributed most to the reduction in emissions of N2O and CO2 from soils between SW and SUW, should be a key period for mitigating GHGs emissions. Response of N2O and CO2 emissions to soil WFPS and temperature illustrated that moisture was the dominant parameters that triggering GHG pulse emissions (especially for N2O), and temperature had a greater effect on the soil microorganism activity than moisture in drier soil. Avoiding moisture and temperature are appropriate for GHG emission at the same time is essential for GHGs mitigation, because peak N2O and CO2 emission were observed only when moisture and temperature are both appropriate. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83106
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China
Recommended Citation:
Wei Q,, Xu J,, Yang S,et al. Subsurface watering resulted in reduced soil N2O and CO2 emissions and their global warming potentials than surface watering[J]. Atmospheric Environment,2018-01-01,173