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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012);Ekonomika / Economics (S004)
Author(s): Baležentienė, Ligita;Mikša, Ovidijus;Baležentis, Tomas;Štreimikienė, Dalia
Title: Seasonal net carbon exchange in rotation crops in the temperate climate of Central Lithuania
Is part of: Sustainability. Basel : MDPI AG, 2019, Vol. 11, iss. 7
Extent: p. 1-8
Date: 2019
Keywords: CO2 fluxes;Bio-parameters;Environment;Crops
Abstract: Intelligent agricultural solutions require data on the environmental impacts of agriculture. In order for operationalize decision-making for sustainable agriculture, one needs to establish the corresponding datasets and protocols. Increasing anthropogenic CO2 emissions into the atmosphere force the choice of growing crops aimed at mitigating climate change. For this reason, investigations of seasonal carbon exchange were carried out in 2013–2016 at the Training Farm of the Vytautas Magnus University (former Aleksandras Stulginskis University), Lithuania. This paper compares the carbon exchange rate for different crops, viz., maize, ley, winter wheat, spring rapeseed and barley under conventional farming. This study focuses on the carbon exchange rate. We measure the emitted and absorbed CO2 fluxes by applying the closed chamber method. The biomass measurement and leaf area index (LAI) calculations at different plant growth stages are used to evaluate carbon exchange in different agroecosystems. The differences in photosynthetically assimilated CO2 rates were significantly impacted by the leaf area index (p = 0.04) during the plant vegetation period. The significantly (p = 0.02–0.05) strong correlation (r = 0.6– 0.7) exists between soil respiration and LAI. Soil respiration composed only 21% of the agroecosystem carbon exchange. Plant respiration ranged between 0.034 and 3.613 μmol m−2 s−1 during the vegetation period composed of a negligible ratio (mean 16%) of carbon exchange. Generally, respiration emissions were obviously recovered by the gross primary production (GPP) of crops. Therefore, the ecosystems were acting as an atmospheric CO2 sink. Barley accumulated the lowest mean GPP 12.77 μmol m−2 s−1. The highest mean GPP was determined for ley (14.28 μmol m−2 s−1) and maize (15.68 μmol m−2 s−1) due to the biggest LAI and particular bio-characteristics
Affiliation(s): Lietuvos agrarinės ekonomikos institutas
Miškų ir ekologijos fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:1. Straipsniai / Articles
Universiteto mokslo publikacijos / University Research Publications

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