(Cu, Zn) in Vineyard Soils and Transport Via Soil Erosion
EGU2020-21339 https://doi.org/10.5194/egusphere-egu2020-21339 EGU General Assembly 2020 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Accumulation of micronutrients (Cu, Zn) in vineyard soils and transport via soil erosion Izabella Babcsányi1, Nhung Thi Ha Pham1, Péter Balling2, Zalán Tobak1, and Andrea Farsang1,3 1Department of Physical Geography and Geoinformatics, University of Szeged, Szeged, Hungary 2Tokaji Kutatóintézet, Szőlészeti és Borászati Kutató Nonprofit Kft, Tarcal, Hungary 3Institute of Environmental Science and Technology, University of Szeged, Szeged, Hungary Copper (Cu) and zinc (Zn) are important micronutrients for vine plants; however, the long-term use of Cu-fungicides and micronutrient fertilizers can lead to their accumulation in the topsoil of vineyards. Water erosion on sloping vineyards transports sediments downslope, a processus that may redistribute micronutrients in the topsoils. Our study aims at assessing the rate of enrichment in Cu and Zn of vineyard topsoils compared to the geochemical background and their downhill transport during rainfall events attached to sediments. The study was conducted in 2019 in a 1,8 ha sloping vineyard at Tokaj (mean slope: 8°) and a 0.4 ha plot near Tállya (mean slope: 18°), both in the historical vinegrowing region of Tokaj-Hegyalja (in northern Hungary). The vineyards at Tokaj have been converted to organic farming, where Cu- based fungicides are repeatedly used in a typical dose of 4 kg/ha/year, supplemented with fertilizers containing micronutrients. The soil samples from the top layers (0-10 cm and 10-20 cm) have been collected using a hand auger from the two vineyards and from local forested sites, the latter accounting for the local geochemical background.
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