DOI: 10.1016/j.atmosenv.2017.05.003
Scopus记录号: 2-s2.0-85018444986
论文题名: Partial wetting irrigation resulted in non-uniformly low nitrous oxide emissions from soil
作者: Wei Q ; , Xu J ; , Yang S ; , Qi Z ; , Wang Y ; , Liao L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 200
结束页码: 209
语种: 英语
英文关键词: N2O emission
; Non-uniformly distribution
; Partial wetting irrigation
; Subsurface drip irrigation
Scopus关键词: Emission control
; Exponential functions
; Irrigation
; Moisture
; Moisture meters
; Nitrogen oxides
; Soil moisture
; Subirrigation
; Wetting
; Emission mitigation
; Moisture distribution
; Nitrous oxide emissions
; Non-uniformly distribution
; Partial wetting
; Soil moisture distribution
; Subsurface drip irrigation
; Surface irrigation
; Soils
; nitrous oxide
; drip irrigation
; emission control
; irrigation system
; nitrous oxide
; soil emission
; soil moisture
; Article
; controlled study
; evaporation
; greenhouse gas
; irrigation (agriculture)
; mesocosm
; nitrous oxide emission
; partial wetting irrigation
; priority journal
; reduction (chemistry)
; soil chemistry
; soil moisture
; soil treatment
; surface area
; surface soil
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: Partial wetting irrigation influences soil moisture distribution, which potentially changes soil nitrous oxide (N2O) emission. Incubation experiments were conducted to reveal the impact of non-uniform moisture distribution on soil N2O emissions under subsurface-drip-irrigation (SDI), with surface-irrigation (SI) as a control. Results indicated that soil N2O emission from different subregions of SDI soil varied synchronized to soil moisture. The wetting-drying process in different soil subregions under SDI incurred pulse N2O emissions unexceptionally, but the pulse magnitudes and timing of the occurrence varied among subregions. The pulse N2O emission magnitudes positively correlated to the match degree of soil moisture to the optimal soil moisture level for peak N2O emissions. The soil water-filled-porosity WFPS ranges for peak N2O fluxes, the determine coefficient of the exponential functions between N2O flux and soil WFPS and its average slopes, decreased gradually from the central to periphery SDI soil subregions. Both peak and cumulative N2O fluxes were much lower from the periphery subregions than from central subregions. On the whole, SDI reduced the cumulative N2O emissions by 77.3–86.7% compared to SI, with periphery suberegions of R3 and R4 contributing for more than 76%. The partial wetting SDI irrigation can significantly reduce soil N2O emissions and is a promising strategy for soil N2O emission mitigation. Further research should be conducted on how to design SDI properly to balance the soil moisture uniformity/efficiency and soil N2O emission reduction. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82723
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; Department of Bioresource Engineering, McGill UniversityQuebec, Canada
Recommended Citation:
Wei Q,, Xu J,, Yang S,et al. Partial wetting irrigation resulted in non-uniformly low nitrous oxide emissions from soil[J]. Atmospheric Environment,2017-01-01,161