globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-017-0331-z
Scopus记录号: 2-s2.0-85017252761
论文题名:
Alternative futures of dissolved inorganic nitrogen export from the Mississippi River Basin: influence of crop management, atmospheric deposition, and population growth
作者: McCrackin M.L.; Cooter E.J.; Dennis R.L.; Harrison J.A.; Compton J.E.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 133, 期:3
起始页码: 263
结束页码: 277
语种: 英语
英文关键词: Dissolved inorganic nitrogen ; Gulf of Mexico ; Mississippi River Basin ; Nitrogen export model ; Tile drainage
Scopus关键词: agricultural land ; agricultural management ; atmospheric deposition ; bioenergy ; crop production ; dissolved inorganic nitrogen ; hypoxia ; maize ; nitrogen ; numerical model ; nutrient enrichment ; population growth ; river basin ; tile drain ; wastewater treatment plant ; Atlantic Ocean ; Gulf of Mexico ; Mississippi River ; United States ; Zea mays
英文摘要: Nitrogen (N) export from the Mississippi River Basin contributes to seasonal hypoxia in the Gulf of Mexico (GOM). We explored monthly dissolved inorganic N (DIN) export to the GOM for a historical year (2002) and two future scenarios (year 2022) by linking macroeonomic energy, agriculture market, air quality, and agriculture land management models to a DIN export model. Future scenarios considered policies aimed at encouraging bioenergy crop production and reducing atmospheric N-emissions, as well as the effect of population growth and the states’ infrastructure plans on sewage fluxes. Model-derived DIN export decreased by about 9% (from 279 to 254 kg N km−2 year−1) between 2002 and 2022 due to a 28% increase in area planted with corn, 24% improvement in crop N-recovery efficiency (NRE, to 0.52), 22% reduction in atmospheric N deposition, and 23% increase in sewage inputs. Changes in atmospheric and sewage inputs had a relatively small effect on DIN export and the effect of bioenergy crop production depended on nutrient management practices. Without improved NRE, increased production of corn would have increased DIN export by about 14% (to 289 kg N km−2 year−1) between 2002 and 2022. Model results suggest that meeting future crop demand while reducing the areal extent of hypoxia could require aggressive actions, such improving basin-level crop NRE to 0.62 or upgrading N-removal capabilities in waste water treatment plants beyond current plans. Tile-drained cropland could contribute up to half of DIN export; thus, practices that reduce N losses from tile drains could also have substantial benefit. © 2017, The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83277
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: School of the Environment, Washington State University, Vancouver, WA, United States; Office of Research and Development, National Exposure Research Lab, U. S. Environmental Protection Agency, Research Triangle Park, NC, United States; Office of Research and Development, National Health and Environmental Effects Research Laboratory, Western Ecology Division, U. S. Environmental Protection Agency, Corvallis, OR, United States; Baltic Sea Centre, Stockholm University, Stockholm, Sweden

Recommended Citation:
McCrackin M.L.,Cooter E.J.,Dennis R.L.,et al. Alternative futures of dissolved inorganic nitrogen export from the Mississippi River Basin: influence of crop management, atmospheric deposition, and population growth[J]. Biogeochemistry,2017-01-01,133(3)
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