Temporal Dynamics of CO 2 Fluxes over a Non-Irrigated Vineyard

Aysan Badraghi (), Beáta Novotná, Jan Frouz, Koloman Krištof, Martin Trakovický, Martin Juriga, Branislav Chvila and Leonardo Montagnani
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Aysan Badraghi: Institute of Landscape Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
Beáta Novotná: Institute of Landscape Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
Jan Frouz: Institute for Environmental Studies, Charles University, Fac. Sci. Benatska 2, 128 00 Prague 2, Czech Republic
Koloman Krištof: Institute of Agricultural Engineering, Transport and Bioenergetics, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
Martin Trakovický: TRAKO, s.r.o. Pod lesom 11, 949 01 Nitra, Slovakia
Martin Juriga: Institute of Agronomic Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
Branislav Chvila: Meteorological and Climatological Monitoring, Slovak Hydrometeorological Institute, Jeséniova 17, 833 15 Bratislava, Slovakia
Leonardo Montagnani: Faculty of Science and Technology, Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy

Land, 2023, vol. 12, issue 10, 1-16

Abstract: Some knowledge gaps still remain regarding carbon sequestration in non-irrigated agroecosystems, where plants may experience drought stress during summertime. Therefore, by the combination of the eddy covariance (EC) and soil chamber techniques, we determined the role of a non-irrigated grassed vineyard in carbon sequestration in the Slovak Republic. Based on the EC data, the cumulative net uptake of CO 2 (NEE) for the whole growing season was weak and was ca. −97 (g C m −2 ). This value resulted from −796 (g C m −2 ) carbon uptake from the atmosphere through photosynthesis (GEE) and 699 (g C m −2 ) carbon released to the atmosphere through respiration (Reco). Carbon emissions through Reco were considerable and accounted for ca. 88% of GEE, which points out the importance of Reco for managing non-irrigated agroecosystems. Data from the soil chamber indicated that ca. 302 g C m −2 was released by the vineyard through soil respiration (Rsoil) over a growing season, which was constantly lower than Reco and accounted for ca. 44 ± 18% of Reco. This finding implies that the vineyard soil was not a main source of carbon emissions. Rsoil was mainly driven by temperature (exponentially ca. 69–85%). Meanwhile, vapour pressure deficit (VPD) and temperature appeared to be the most important limiting factors for GEE, NEE, and Reco, particularly when they exceeded a certain threshold (e.g., temperature > 17 °C, and VPD > 10 hPa).

Keywords: vineyard; eddy covariance; carbon fluxes; environmental factor; carbon sequestration (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2023
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