Abstract

Nitrous oxide (N2O) is an important greenhouse gas and fundamental questions about the capacity of soil microbial communities to act not only as sources, but also as sinks for N2O remains unanswered. We evaluated the capacity of non-denitrifying N2O-reducers to mitigate the production of this greenhouse gas in soil. We showed experimentally that the addition of the non-denitrifying strain Dyadobacter fermentans, which possesses the previously unaccounted N2O reductase NosZII to 11 different soils significantly reduced N2O production of up to 189% in more than 1/3 of the soils. The magnitude of this effect was significantly influenced by the soil pH and C/N ratio. Overall, our results provide unambiguous evidence that the overlooked non-denitrifying NosZII-type bacteria can contribute to N2O consumption in soil. (C) 2016 Elsevier Ltd. All rights reserved.

Keywords

Greenhouse gas; nosZ; Mitigation; Microbial community; Nitrogen; Denitrification

Published in

Soil Biology and Biochemistry
2016, Volume: 103, pages: 376-379
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Putz, Tina

  • Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
    

• Hallin, Sara

  • Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Environmental Sciences
Soil Science
Microbiology


Publication identifier

DOI: https://doi.org/10.1016/j.soilbio.2016.09.010

Permanent link to this page (URI)

https://res.slu.se/id/publ/79408