Assessment of greenhouse gas emissions from organic soils
Abstract
The estimation of greenhouse gas emissions was carried out by using model calculations of the dynamics of organic matter in organic soils and emissions of greenhouse gases (PEAT-GHG-MODEL). Emissions of CO2, CH4, N2O, NO and carbon accumulation in drained organic soil in reclamation «Kryukovo» system located in the Chernihiv province in the period 2000–2011 were modeled. The lot with vegetation type Community of Cārex humīlis / Cārex rhizīna was studied. The average rate of above-ground dry matter is 125–325 g/m2, the content of organic matter in dry matter of the plant is 45.5– 47.8 %. The average annual rates of CO2, CH4, N2O, NO emissions for the period 2000–2011 are 6.718 tons of CO2 – C ha–1 ∙ y–1; 2.960 kg of CH4 – C ha–1 ∙ y–1; 5.583 kg N2O and NO – N ha–1 ∙ y–1 respectively. The carbon accumulation in the soil varied from year to year, from 0.439 to 0.836 tons C ha–1 ∙ y–1. The estimations of annual variability of CO2, CH4, N2O and NO fluxes for the two contrasting GWL dynamics 2006 and 2010 years were given.
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