Fluxes of nitrous oxide and methane on an abandoned peat extraction site: Effect of reed canary grass cultivation

Drained organic soils are among the most risky soil types as far as their greenhouse gas emissions are considered. Reed canary grass (RCG) is a potential bioenergy crop in the boreal region, but the atmospheric impact of its cultivation is unknown. The fluxes of N 2O and CH 4 were measured from an a...

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Bibliographic Details
Published in:	Bioresource technology Vol. 100; no. 20; pp. 4723 - 4730
Main Authors:	Hyvönen, N.P., Huttunen, J.T., Shurpali, N.J., Tavi, N.M., Repo, M.E., Martikainen, P.J.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-10-2009 [New York, NY]: Elsevier Ltd Elsevier
Subjects:	Agriculture atmospheric circulation Biological and medical sciences Biomass Drained boreal peatlands drained conditions energy crops Finland Fundamental and applied biological sciences. Psychology gas emissions Greenhouse Effect Greenhouse gases land restoration Land-use meteorological parameters methane Methane - analysis nitrous oxide Nitrous Oxide - analysis organic soils peat soils peatlands Phalaris - growth & development Phalaris arundinacea Phalaris arundinacea L Rain Reed canary grass seasonal variation Seasons Snow Soil soil chemical properties soil physical properties Temperature winter Reed canary grass Phalaris arundinacea L Drained boreal peatlands Greenhouse gases Land-use Methane Monocotyledones Phalaris arundinacea Peat Land use Peat bog Drainage Gramineae Greenhouse gas Angiospermae Spermatophyta Fodder crop Nitrogen protoxide Culture
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Summary:	Drained organic soils are among the most risky soil types as far as their greenhouse gas emissions are considered. Reed canary grass (RCG) is a potential bioenergy crop in the boreal region, but the atmospheric impact of its cultivation is unknown. The fluxes of N 2O and CH 4 were measured from an abandoned peat extraction site (an organic soil) cultivated with RCG using static chamber and snow gradient techniques. The fluxes were measured also at an adjacent site which is under active peat extraction and it is devoid of any vegetation (BP site). The 4-year average annual N 2O emissions were low being 0.1 and 0.01 g N 2O m −2 a −1 at the RCG and BP sites, respectively. The corresponding mean annual CH 4 emissions from the RCG and BP sites were also low (0.4 g and 0.9 g CH 4 m −2 a −1). These results highlight for the first time that there are organic soils where cultivation of perennial bioenergy crops is possible with low N 2O and CH 4 emissions.
Bibliography:	http://dx.doi.org/10.1016/j.biortech.2009.04.043 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0960-8524 1873-2976
DOI:	10.1016/j.biortech.2009.04.043