A talaj arzénterhelésének hatása a kísérleti növények arzéntartalmára nehézfémterheléses tartamkísérletben

Abstract

A small-plot heavy metal load experiment was established in the field in 1994 on brown forest clay soil at the Tass-puszta Model Farm of Eszterházy Károly University of Applied Sciences. The field trial was set up with 8 elements (Al, As, Cd, Cr, Cu, Hg, Pb, Zn), on 3 levels each (0/30, 90, 270 kg element ha-1) in triplicate. In 1998 pea (Pisum sativum L.), in 1999 sorghum (Sorghum bicolorL.), in 2001 winter barley (Hordeum vulgare L.), in 2002 white mustard (Sinapis alba L.), in 2003 hemp (Cannabis sativa L.) and 2005 alfalfa (Medicago sativa L.) was the test plant. During the experiment we studied the heavy metal content of the soil and the plants, in the course of which we can monitor the evolution of the tested elements in the soil and the soil-plant system. The expressed depressive effect of arsenic appeared in the first two years of the experiment, in the subsequent years of the experiment it decreased in the observed plants and then ceased. Arsenic was not enriched in the plant organs at maximum load, but only a few vegetative organs of the plant showed some accumulation. The seed production of the experimental plants has been protected against arsenic contamination. Based on the experimental results it can be stated that the movement of the arsenic inhibited the soil-plant system, its mobility decreased considerably from the fourth year of the experiment.