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Measuring denitrification and the N$_{2}$O:(N$_{2}$O + N$_{2}$) emission ratio from terrestrial soils

Friedl, Johannes; Cardenas, Laura M; Clough, Timothy J; Dannenmann, Michael; Hu, Chunsheng; Scheer, Clemens

Abstract:
Denitrification, a significant pathway of reactive N-loss from terrestrial soils, impacts on agricultural production and the environment. Net production and emission of the denitrification product nitrous oxide (N$_{2}$O) is readily quantifiable, but measuring denitrification's final product, dinitrogen (N$_{2}$), against a high atmospheric background remains challenging. This review examines methods quantifying both N$_{2}$ and N$_{2}$O emissions, based on inhibitors, helium/O$_{2}$ atmosphere exchange, and isotopes. These methods are evaluated regarding their capability to account for pathways of N$_{2}$ and N$_{2}$O production and we suggest quality parameters for measuring denitrification from controlled environments to the field scale. Our appraisal shows that method combinations, together with real-time monitoring and soil-gas diffusivity modelling, have the potential to significantly improve our quantitative understanding for denitrification from upland soils. Requirements for instrumentation and experimental setups however highlight the need to develop more mobile and easily accessible field methods to constrain denitrification from terrestrial soils across scales.

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Verlagsausgabe §
DOI: 10.5445/IR/1000129648
Veröffentlicht am 12.02.2021
Originalveröffentlichung
DOI: 10.1016/j.cosust.2020.08.006
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2020
Sprache Englisch
Identifikator ISSN: 1877-3435
KITopen-ID: 1000129648
HGF-Programm 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Current opinion in environmental sustainability
Verlag Elsevier
Band 47
Seiten 61–71
Nachgewiesen in Scopus
Web of Science
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