Articles | Volume 17, issue 22
Biogeosciences, 17, 5513–5537, 2020
https://doi.org/10.5194/bg-17-5513-2020
Biogeosciences, 17, 5513–5537, 2020
https://doi.org/10.5194/bg-17-5513-2020

Research article 14 Nov 2020

Research article | 14 Nov 2020

N2O isotope approaches for source partitioning of N2O production and estimation of N2O reduction – validation with the 15N gas-flux method in laboratory and field studies

Dominika Lewicka-Szczebak et al.

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Cited articles

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Baily, A., Watson, C. J., Laughlin, R., Matthews, D., McGeough, K., and Jordan, P.: Use of the 15N gas flux method to measure the source and level of N2O and N2 emissions from grazed grassland, Nutr. Cycl. Agroecosys., 94, 287–298, 2012. 
Barford, C. C., Montoya, J. P., Altabet, M. A., and Mitchell, R.: Steady-state nitrogen isotope effects of N2 and N2O production in Paracoccus denitrificans, Appl. Environ. Microb., 65, 989–994, 1999. 
Baumgärtel, B. and Benke, M.: Düngeempfehlungen Stickstoff: Getreide, Raps, Hackfrüchte, Landwirtschaftskammer Niedersachsen – Geschäftsbereich Landwirtschaft, Hannover, 2009. 
Bergsma, T. T., Ostrom, N. E., Emmons, M., and Robertson, G. P.: Measuring simultaneous fluxes from soil of N2O and N2 in the field using the 15N-Gas “nonequilihrium” technique, Environ. Sci. Technol., 35, 4307–4312, 2001. 
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Short summary
We present the first validation of N2O isotopic approaches for estimating N2O source pathways and N2O reduction. These approaches are widely used for tracing soil nitrogen cycling, but the results of these estimations are very uncertain. Here we report the results from parallel treatments allowing for precise validation of these approaches, and we propose the best strategies for results interpretation, including the new idea of an isotope model integrating three isotopic signatures of N2O.
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