Articles | Volume 18, issue 3
Biogeosciences, 18, 1185–1201, 2021
https://doi.org/10.5194/bg-18-1185-2021
Biogeosciences, 18, 1185–1201, 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 et al.

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Cited articles

Andersen, A. J. and Petersen, S. O.: Effects of C and N availability and soil-water potential interactions on N2O evolution and PLFA composition, Soil Biol. Biochem., 41, 1726–1733, https://doi.org/10.1016/j.soilbio.2009.06.001, 2009. 
Aon, M. A., Sarena, D. E., Burgos, J. L., and Cortassa, S.: Interaction between gas exchange rates, physical and microbiological properties in soils recently subjected to agriculture, Soil Tillage Res., 60, 163–171, https://doi.org/10.1016/S0167-1987(01)00191-X, 2001. 
Arah, J. R. M. and Smith, K. A.: Steady-state denitrification in aggregated soil – A mathematical approach, J. Soil Sci., 40, 139–149, https://doi.org/10.1111/j.1365-2389.1989.tb01262.x, 1989. 
Arah, J. R. M. and Vinten, A. J. A.: Simplified models of anoxia and denitrification in aggregated and simple-structured soils, Eur. J. Soil Sci., 46, 507–517, https://doi.org/10.1111/j.1365-2389.1995.tb01347.x, 1995. 
Balaine, N., Clough, T. J., Beare, M. H., Thomas, S. M., Meenken, E. D., and Ross, J. G.: Changes in relative gas diffusivity explain soil nitrous oxide flux dynamics, Soil Sci. Soc. Am. J., 77, 1496–1505, https://doi.org/10.2136/sssaj2013.04.0141, 2013. 
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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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