Abstract

Nitrous oxide (N2O) is a potent greenhouse gas mainly produced by incomplete denitrification in agricultural soils. The rhizosphere is a hot spot for denitrification and this study aimed to discern the relative importance of soil type and crop on the genetic N2O production and reduction potential in soil and root associated communities in relation to denitrification activity. Based on a pot experiment with two agricultural soils planted with barley or sunflower, we showed that the effect of soil type overrode that of crop on both genetic and enzymatic potential. We also demonstrate niche differentiation between the nitrous oxide reductase genes nosZI and nosZII, with clade I dominating in the root-associated community and clade II in the soil. (C) 2016 Elsevier Ltd. All rights reserved.

Keywords

Barley; Denitrification; Nitrous oxide; Rhizosphere; Sunflower

Published in

Soil Biology and Biochemistry
2016, Volume: 100, pages: 125-128
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Graf, Daniel

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

• Zhao, Enid Ming

  • Department of Plant Biology, Swedish University of Agricultural Sciences
    

• Jones, Christopher

  • 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

Agricultural Science
Soil Science
Microbiology


Publication identifier

DOI: https://doi.org/10.1016/j.soilbio.2016.06.006

Permanent link to this page (URI)

https://res.slu.se/id/publ/78295