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 2009-10, Vol.100 (20), p.4723-4730
Main Authors: Hyvönen, N.P., Huttunen, J.T., Shurpali, N.J., Tavi, N.M., Repo, M.E., Martikainen, P.J.
Format: Article
Language:English
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
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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.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2009.04.043