Articles | Volume 18, issue 3
https://doi.org/10.5194/bg-18-1185-2021
https://doi.org/10.5194/bg-18-1185-2021
Research article
 | 
16 Feb 2021
Research article |  | 16 Feb 2021

Denitrification in soil as a function of oxygen availability at the microscale

Lena Rohe, Bernd Apelt, Hans-Jörg Vogel, Reinhard Well, Gi-Mick Wu, and Steffen Schlüter

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Short summary
Total denitrification, i.e. N2O and (N2O + N2) fluxes, of repacked soil cores were analysed for different combinations of soils and water contents. Prediction accuracy of (N2O + N2) fluxes was highest with combined proxies for oxygen demand (CO2 flux) and oxygen supply (anaerobic soil volume fraction). Knowledge of denitrification completeness (product ratio) improved N2O predictions. Substitutions with cheaper proxies (soil organic matter, empirical diffusivity) reduced prediction accuracy.
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