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Type of publication: research article
Type of publication (PDB): Straipsnis konferencijos medžiagoje kitose duomenų bazėse / Article in conference proceedings in other databases (P1c)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Baležentienė, Ligita;Užupis, Arnoldas
Title: Fuzzy TOPSIS applied for evaluation of mitigation strategies for greenhouse gas emissions from abandoned grassland
Is part of: Applied information and communication technologies [elektroninis išteklius]: proceedings of the 5-th international scientific conference, Jelgava, Latvia, april 26-27, 2012. Jelgava, 2012
Extent: p. 242-249
Date: 2012
Keywords: Fuzzy TOPSIS;Sustainability;Grassland;Fertilizing
ISBN: 978-9984-48-065-7
Abstract: Most agricultural area lies under permanent grasslands (3488 M ha, or 69%). Grasslands and fertilized areas occupy about 20% of the Earth’s land surface generating considerable GHG emissions and increasing global climate change. Grassland compose 1.2 M ha, or 50 % of agricultural lands in Lithuania. Accounting for GHG emission of grassland ecosystems may be important to evaluate and interpret measurements of fluxes at regional and ecosystem levels. Therefore biosphere-atmosphere interactions were investigated on a clay loam topsoil over silt loam (Calc(ar)i-Endohypogleyic Luvisol) in different managed grassland ecosystems of Training farm of Lithuanian University of Agriculture in 2009 within the frame of the European Projects COST. Objective of this investigation was to determine impact of fertilizers, their rates and combinations on GHG emission and productivity of abandoned semi-natural sward and cultural pasture. GHG emission measurements were run in June-September, when meteorological conditions were optimal for intensive plant and soil biota physiological processes, in absence of frosts stress. Gradual decline of GHG fluxes was observed during vegetation, in accordance with decreasing supply of environmental components encompassing organical substrates, fertilizers, activity of microorganisms, as well as their interaction with humidity and temperature (HTC ranged from 2.0 to 0.9). There was strong correlation observed between mean N2O, CO2 and CH4 emission during vegetation period on the one hand, and NPK (r=0.9, 0.8 and 0.9) with monomial nitrogen fertilizers (r=0.8 and 0.6) on the other. The fuzzy multi-criteria decision making method TOPSIS was applied when choosing the best compromise fertilizing regime. Therefore appropriate fertilizing rate for supporting soil fertility and low emissions rate should not to exceed N60P40K50
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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