Isotopic Composition of In Situ Soil NOx Emissions in Manure-Fertilized Cropland

David J. Miller, Jiajue Chai, Felix Guo, Curtis J. Dell, Heather D. Karsten, Meredith G. Hastings

Research output: Contribution to journalArticle

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Abstract

Soil emissions represent ~25% of the global annual atmospheric budget of nitrogen oxides (NOx). The nitrogen isotopic composition of soil NOx emissions (δ15N-NOx) is potentially useful to track soil emission contributions to NOx budgets, yet its in situ variations with fertilizer management and meteorology are unknown. We quantify in situ δ15N-NOx distributions from liquid dairy manure-fertilized cropland in State College, Pennsylvania at hourly resolution during spring 2016 and 2017. δ15N-NOx (n = 37) ranged from −44.2 to −14.0‰ and was distinct between injected (−32.2 ± 12.1‰) and broadcast manure without tillage (−23.4 ± 2.1‰). δ15N-NOx was not correlated with order of magnitude emission variations due to large changes in soil moisture. δ15N-NOx differences between treatments were associated with nitrification and NO consumption contributions. Our results suggest that δ15N-NOx can be a valuable observational tracer of soil emissions and varies with fertilizer management practices.

Original languageEnglish (US)
Pages (from-to)12,058-12,066
JournalGeophysical Research Letters
Volume45
Issue number21
DOIs
StatePublished - Nov 16 2018

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manures
farmlands
nitrogen oxides
soil nitrogen
manure
soils
isotopic composition
soil emission
fertilizers
budgets
fertilizer
in situ
soil moisture
meteorology
tillage
tracers
nitrification
management practice
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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Miller, David J. ; Chai, Jiajue ; Guo, Felix ; Dell, Curtis J. ; Karsten, Heather D. ; Hastings, Meredith G. / Isotopic Composition of In Situ Soil NOx Emissions in Manure-Fertilized Cropland. In: Geophysical Research Letters. 2018 ; Vol. 45, No. 21. pp. 12,058-12,066.
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Isotopic Composition of In Situ Soil NOx Emissions in Manure-Fertilized Cropland. / Miller, David J.; Chai, Jiajue; Guo, Felix; Dell, Curtis J.; Karsten, Heather D.; Hastings, Meredith G.

In: Geophysical Research Letters, Vol. 45, No. 21, 16.11.2018, p. 12,058-12,066.

Research output: Contribution to journalArticle

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AU - Hastings, Meredith G.

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