Constraining the conditions conducive to dissimilatory nitrate reduction to ammonium in temperate arable soils

Schmidt, Christoph S., Richardson, David J. ORCID: https://orcid.org/0000-0002-6847-1832 and Baggs, Elizabeth M. (2011) Constraining the conditions conducive to dissimilatory nitrate reduction to ammonium in temperate arable soils. Soil Biology and Biochemistry, 43 (7). pp. 1607-1611. ISSN 0038-0717

Full text not available from this repository. (Request a copy)

Abstract

Here we offer the first assessment of conditions conducive to dissimilatory nitrate reduction to ammonium (DNRA) in temperate arable soils, through an examination of the potential for this process to occur in a range of soils of contrasting characteristics. NH415NO3 (6.2 g N m-2, 25 atom % excess 15N) was applied, and recovery of 15N in the NH4+ pool taken as indicative of occurrence of DNRA. Up to 5% of applied 15N was recovered in the NH4+ pool 2 d after addition of N, glucose (44.6 g C m-2) and l-cysteine (7.7 g m-2, 0.9 g N m-2, 2.3 g C m-2). N15-NH4+ concentrations were positively correlated with soil pH, C-to-NO3- ratio, bulk density, sand content and NO2- concentration, but negatively correlated with soil C and organic N content. Our results demonstrate the potential for DNRA to contribute to N cycling in temperate arable soils, but its detection and significance is likely to depend on the provision of a low molecular weight C source.

Item Type: Article
Additional Information: Funding Information: This work was funded by the Biotechnology and Biological Sciences Research Council (UK) [ BB/D012384/1 ]. Elizabeth M Baggs was supported by an Advanced Research Fellowship from the Natural Environment Research Council (UK) [ NE/B500666/1 ]. We thank Carlo Leifert and Peter Shotton (Nafferton Ecological Farming group, Newcastle University) for the Tadcaster and Stocksbridge soils, and we thank Lorna Mair and Janet Woo for assistance with the 15 N analysis.
Uncontrolled Keywords: dissimilatory nitrate reduction to ammonium,nitrate ammonification,nitrous oxide,stable isotopes,microbiology,soil science ,/dk/atira/pure/subjectarea/asjc/2400/2404
Faculty \ School:
Faculty of Science > School of Biological Sciences
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 14 Jul 2022 16:30
Last Modified: 12 Aug 2022 05:34
URI: https://ueaeprints.uea.ac.uk/id/eprint/86119
DOI: 10.1016/j.soilbio.2011.02.015

Actions (login required)

View Item View Item