engleski

Heavy metals concentration in soybean as affected by different tillage systems in Baranja region

Different tillage systems affect the root adsorption of trace elements. Also, under different climatic conditions accessibility of nutrients in the soil decreased during the growing period as low water content in the soil becomes a limiting factor in the transfer of nutrients in the rhizosphere area. The aim of this study was determine effect of conventional tillage, reduced tillage and no tillage on the heavy metal concentration in soybean during three climatic different years. The study was performed in a field experiment at the North- eastern Croatia, in Barany region, on chernozem soil type during the period 2003-2005 with following continuous soil tillage treatments: CT – conventional soil tillage, based on moldboard ploughing ; DH – multiple pass diskharrowing ; and NT – no-tillage. Soybean was analysed for molybdenum (Mo), cooper (Cu), lead (Pb), nickel (Ni), cadmium (Cd), chromium (Cr), zinc (Zn) iron (Fe), manganese (Mn) and cobalt (Co). There was a significant influence of climatic conditions on the concentration of Zn, Cd, Cr, Mn, Pb and Fe, whereas Tillage influence was mostly indirect, but visible through the interaction Year x Tillage. The effects of tillage were significant only for cooper concentration.

heavy metal ; soybean ; tillage

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