DOI: 10.1016/j.watres.2017.11.040
Scopus记录号: 2-s2.0-85038229827
论文题名: Characterization of dissolved organic nitrogen in leachate from a newly established and fertilized turfgrass
作者: Lusk M.G. ; Toor G.S. ; Inglett P.W.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 52
结束页码: 61
语种: 英语
英文关键词: Dissolved organic nitrogen
; Groundwater quality
; Leaching
; Nitrogen
; Turfgrass
Scopus关键词: Byproducts
; Dissolution
; Fertilizers
; Groundwater
; Isotopes
; Leaching
; Lysimeters
; Mass spectrometry
; Metabolism
; Nitrogen
; Soil surveys
; Sulfur compounds
; Urban transportation
; Urea
; Water quality
; Dissolved organic N
; Dissolved organic nitrogen
; Fertilizer recoveries
; Fourier transform ion cyclotron resonance
; Inorganic fertilizers
; Isotopic analysis
; Molecular formula
; Turfgrass
; Nitrogen compounds
; ammonium sulfate
; carbohydrate
; dissolved organic matter
; fertilizer
; lignin
; lipid
; nitrogen 15
; nitrogen fertilizer
; organic nitrogen
; protein
; urea
; ammonium sulfate
; concentration (composition)
; dissolved organic nitrogen
; environmental fate
; fertilizer application
; grass
; isotopic analysis
; leachate
; mitigation
; molecular analysis
; soil remediation
; urban ecosystem
; urea
; water quality
; Article
; concentration (parameters)
; controlled study
; infrared spectroscopy
; leaching
; mass spectrometry
; nonhuman
; plant exudate
; priority journal
; soil fertilization
; turfgrass
; Leaching
; Nitrogen
; Water Quality
; Alaska
; Augustine
; Augustine Island
; United States
; Poaceae
英文摘要: Understanding the mechanisms of nitrogen (N) retention and loss from fertilized urban turfgrass is critical to develop practices that mitigate N transport and protect water quality in urban ecosystems. We investigated the fate of N in lysimeters sodded with St. Augustine turfgrass and amended with labeled 15N from either ammonium sulfate or urea. Fourier transform ion cyclotron resonance mass spectroscopy (FTICR-MS) was employed to identify various biomolecular classes in the leached dissolved organic N (DON) from one lysimeter for each treatment and the control. Mean DON concentrations, over 92 days, were 88, 94, and 94% of total N in the leachate from the control, urea, and ammonium sulfate treatments, respectively. Isotopic analysis showed that <3% of N in the leachate originated from newly applied N fertilizer, suggesting that the remainder of the N in the leachate was derived from the lysimeter soil or sod biomass pools. The 15N fertilizer recovery was greatest in soil (44–48%), followed by sod+thatch (18–33%), grass clippings (10–13%), and leachate (<3%). Despite isotopic evidence of little contribution of N from fertilizers in the leachate, a fraction of ammonium sulfate fertilizer was recovered as DON in the leachate, likely after uptake and conversion of inorganic fertilizer to organic plant exudates and/or microbial byproducts. FTICR-MS identified N-bearing organic molecular formulas in the leachate from urea and ammonium sulfate treatments, providing evidence of N leaching from newly established turfgrass of DON compounds in a range of biomolecular compositions such as lipid-, protein-, carbohydrate-, and lignin-like molecules. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113029
Appears in Collections: 气候减缓与适应
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作者单位: Gulf Coast Research and Education Center, University of Florida, Institute of Food and Agricultural Sciences Extension, 1200 N Park Rd., Plant City, FL 33563, United States; Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, United States; Soil and Water Sciences Department, University of Florida, Gainesville, FL 32611, United States
Recommended Citation:
Lusk M.G.,Toor G.S.,Inglett P.W.. Characterization of dissolved organic nitrogen in leachate from a newly established and fertilized turfgrass[J]. Water Research,2018-01-01,131