COMPARATIVE EVALUATION OF POLLUTION BY HEAVY METALS OF PLOUGHED AND FALLOW LAND AT VARIOUS DURATION OF AGROPEDOGENESIS

Abstract

Studying the features of soil heavy metal/metalloid accumulation formed as a result of long-term agropedogenesis is of great importance for predicting safe use of soil resources in agriculture. In such regions with a long history of agricultural development as Crimea, the topsoil can keep in the soil memory the results of slow-acting processes, including any changes in the solid-phase component of the soil system. The aim of this study was to establish regional differences in the concentration of heavy metal using the chronosequences of agrogenic soil transformation method. The objects of study were the humus-accumulative horizon of 20 soils and their parent rock, for which nine of soil heavy metals / metalloids were identified for two hazard groups using X-ray Fluorescence Analysis. The natural and anthropogenic causes of differences in the accumulation of heavy metal in in soils of the Eastern Crimea (Co, Zn, Pb, V, Ni, Cu, As, Ba and Cr) and in soils of the North-Western Crimea (Co, Cr, Ba, Pb and V) have been established. This will optimize a list of priority indicators in regional systems of agro-ecological regulation and selection of territories for growing organic agricultural products.