Research article - Peer-reviewed, 2007
Nitrification controls N2O production rates in a frozen boreal forest soil
Oquist MG, Petrone K, Nilsson M, Klemedtsson LAbstract
The winter season has been identified as a significant contributor to N2O emissions from boreal soils, but our understanding of the processes regulating these emissions is fragmentary. We investigated potential N-sources and pathways involved in N2O formation in a frozen boreal forest soil by labeling soil samples with N-15-containing substrates, and measured rates of (N2O)-N-15/N-15(2) formation under both oxic and anoxic conditions. Our results showed that all N2O produced in the frozen samples originate from denitrification, but the rate-limiting factor is NO3- availability, which is largely governed by nitrification. This suggests that N2O formation in frozen boreal soils may be sustained for a prolonged period of time, but is governed by a delicate balance of the O-2 regime. (c) 2007 Elsevier Ltd. All rights reservedPublished in
Soil Biology and Biochemistry2007, volume: 39, number: 7, pages: 1809-1811
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Authors' information
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Klemedtsson, Leif
Petrone, Kevin
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
UKÄ Subject classification
Environmental Sciences related to Agriculture and Land-use
Publication Identifiers
DOI: https://doi.org/10.1016/j.soilbio.2007.01.010
URI (permanent link to this page)
https://res.slu.se/id/publ/15405