MULTIFACTORIAL EFFECTS OF THE URBAN-ENVIRONMENT ON THE FLOW AND CUMULATION OF SOME ALLOCHTHONOUS SUBSTANCES ON THE EXAMPLE OF BETULA-PENDULA ROTH

The presented work evaluates the cumulation dynamics of 12 elements (M g, Ca, K. Na. Zn, Fe, Cu, Cd, Pb, Cl, F, S) in leaves of a model woody plant Betula pendula R o t h. and in the soil of three town settlemen ts (Bratislava, Nitra, Zilina) in three functional segments of settlem ent greenery: a town park, a housing estate, a thoroughfare. The highe st values of the total content of anorganogenes in leaves of birch wer e found for Ca, K, Cl, F, S along the thoroughfare in Bratislava, for Mg, Na, Fe, Cu in Nitra, and for Pb, Zn in Zilina. The values reached above-limit levels of physiological tolerability of woody plants. Simi lar is the tendency of elements cumulation in soil. Soil reaction of t he evaluated greenery wholes in surface layers is alkaline and moderat ely increasing with the depth (7.91 - 8.07 pH). Content of the element s in leaves and soil were determined on the basis of evaluation of the growth biorhythm of Betula pendula. No visual symptoms of damage occu rred al these limits under conditions of the evaluated settlements.