Elevated soil copper content in a Bohemian vineyard as a result of fungicide application
2012
Ash, C., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pud | Vacek, O., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Zahradni a Krajinne Architektury | Jaksik, O., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pud | Tejnecky, V., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pud | Drabek, O., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pud
A set of fifty samples were taken from soil surface layers of an anonymous vineyard in the Bohemia region of the Czech Republic. Samples were analysed for basic soil characteristics including pH, humus content and quality, and for potentially toxic elements: Cu, Pb, Zn, Cd and Mn. When compared to soil guideline values, mean Cu exceeded the limit by 280%. Although other elements did not exceed the guideline value, Zn and Cd surpassed background concentrations by 108 and 187%, respectively. Mn did not occur in concentrations that are considered excessive with respect to common natural soil levels. A statistically significant correlation was observed for Cu and Cox, but no significant correlation could be made between Cu and humus quality, suggesting that in this case, Cu retention in surface soil is more dependent on quantity of humic substances rather than humus quality. The unnaturally high accumulation of Cu in the surface horizon is certainly of anthropogenic origin; most likely due to long term application of copper-based fungicides. High observed values of Cd are probably a result of the soils parent material and application of fertilizers which may have contained Cd compounds. Distribution maps illustrated a common trend of potentially toxic element accumulation in the western section of the study area plot. However, many variables which were unmeasured in this study could account for the distribution. Chemical analyses of two wine samples (red and white) from the studied area showed that both samples contained insignificant amounts of Cu but the white wine contained a high level of Cd (0.026 mg/L).
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