DOI: 10.1007/s10533-018-0432-3
Scopus记录号: 2-s2.0-85042361921
论文题名: Isotopic characterization of NHx-N in deposition and major emission sources
作者: Ti C. ; Gao B. ; Luo Y. ; Wang X. ; Wang S. ; Yan X.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 138, 期: 1 起始页码: 85
结束页码: 102
语种: 英语
英文关键词: NH3-N emission
; NHx-N deposition
; Source apportionment
; δ15N-NHx values
Scopus关键词: ammonia
; atmospheric deposition
; atmospheric gas
; climate conditions
; emission inventory
; isotopic analysis
; isotopic composition
; nitrogen isotope
; pollutant source
; source apportionment
; source identification
; stable isotope
; China
; Taihu Lake
; Animalia
; Suidae
英文摘要: Large amounts of atmospheric N deposition cause negative effects on ecosystems. Effective mitigation strategies require the sources of N deposition to be identified and the contributions from individual sources to be quantified. Determination of the isotopic composition represents a useful approach in source apportionment. In this study, the δ15N-NHx of wet and dry atmospheric deposition and the main NH3 emission sources were analyzed at an urban, a suburban and a rural site in the Taihu Lake region of China. The 2-year average δ15N-NH4+ of precipitation was − 3.0 ± 2.3, − 3.1 ± 2.8 and − 0.5 ± 2.8‰ for the urban, suburban and rural sites, respectively. These values were much lower than the corresponding values for particulate NH4+ (15.9, 15.2 and 14.3‰ at the urban, suburban and rural sites, respectively), and much higher than those of gaseous δ15N-NH3 (− 16.7, − 18.2 and − 17.4‰ at the urban, suburban and rural sites, respectively). The δ15N-NH3 of NH3 from the main emission sources ranged from − 30.8 to − 3.3‰ for volatilized fertilizer, from − 35.1 to − 10.5‰ for emissions from a pig farm, and − 24.7 to − 11.3‰ for emissions from a dairy farm. Temporal variations of deposition δ15N-NHx indicated that δ15N-NHx values were lower in summer and autumn, but higher in winter and spring for both precipitation NH4+-N and gaseous NH3-N. Weather conditions such as temperature and precipitation significantly influenced the spatial and temporal distribution of isotope values of the deposition. Analysis of δ15N-NHx in deposition and emission sources identified volatilized fertilizer and livestock wastes as the origins of both gaseous NH3-N and precipitation NH4+-N over the region. A stable isotope mixing model estimated that volatilized fertilizer and animal excreta contributed more than 65% to precipitation NH4+-N, more than 60% to particulate NH4+-N, and more than 75% to gaseous NH3-N. © 2018, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83174
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing, China; Jiangsu Institute of Agricultural Sciences in Coastal Areas, Yancheng, China; State Experimental Station of Agro-Ecosystem in Changshu, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Recommended Citation:
Ti C.,Gao B.,Luo Y.,et al. Isotopic characterization of NHx-N in deposition and major emission sources[J]. Biogeochemistry,2018-01-01,138(1)