engleski

Total concentration and spatial distribution of metals in sloped vineyard soil at the SUPREHILL observatory

Frequent use of agrochemicals results in increased concentration of certain metals in vineyard soils, with the slope of terrain promoting their uneven spatial distribution. Therefore, at the SUPREHILL critical zone observatory (Jazbina experimental station, Zagreb), 27 vineyard soil samples were taken at three soil depths (0-30, 30-60, 60-90 cm) in October of 2020 at the top, middle, and the bottom of the slope, and digested in Aqua regia by microwave technique using MARSXpress system, CEM (HRN ISO 11466:2004). Metal (Fe, Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn, and Hg) total concentrations in soil extracts were then measured using ICP-OES (Vista MPX AX, Varian ; HRN ISO 22036:2011). Data processing was done using Statistical Analysis Software (SAS Institute Inc., Version 8.3 Update 1, Cary NC USA, 2019-2020), with the analysis of variance done using One-Way ANOVA, and the significance of differences between the means determined using Tukey's test at P<0.05. Significant difference between metal total concentrations in soil in regard to the position on the slope (top, middle, and bottom of the slope) was confirmed for Co (at 0-30 cm), with the highest concentration measured at the bottom of the slope (14, 5 mg kg-1), and for Cr (at 60-90 cm), with the highest concentration recorded at the hilltop (45, 2 mg kg-1). Results suggest that total concentration and spatial distribution of certain metals in vineyard soil is significantly affected by the slope of the vineyard.

metal pollution ; hillslope ; agrochemicals ; vadose zone ; metal spatial distribution

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