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  • Title: Fluxes of nitrous oxide and methane on an abandoned peat extraction site: effect of reed canary grass cultivation.
    Author: Hyvönen NP, Huttunen JT, Shurpali NJ, Tavi NM, Repo ME, Martikainen PJ.
    Journal: Bioresour Technol; 2009 Oct; 100(20):4723-30. PubMed ID: 19467859.
    Abstract:
    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(2)O 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(2)O emissions were low being 0.1 and 0.01 g N(2)O 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(2)O and CH(4) emissions.
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