ТЯЖЕЛЫЕ МЕТАЛЛЫ В ТКАНЯХ И ОРГАНАХ PОPULUS PYRAMIDАLIS

Abstract

The data on the accumulation of heavy metals in tissues and organs of poplar pyramidal in industrial and residential functional areas of Kursk are presented. It was found that the leaves of the poplar pyramidal, vegetating in the industrial zone have the maximum depositing capacity and accumulate 1.1 - 5.06 times more heavy metals than the leaves of the studied rock in the residential zone. Concentrations of Pb and Cd in the tissues of the Lombardy poplar depends on their content in the environment. It is noted that they either exceed the norm by 1-27 times, or they grate with normal values of concentrations of heavy metals in plants. Zn, Cu and Ni concentrations in poplar tree tissues in the studied areas did not exceed MAC. It is noted that the content of heavy metals in the tissues of above-ground and underground bodies of the pyramidal poplar varies greatly. The limit of variation of lead concentrations in the studied plants reaches 241.2 units. Such fluctuations are due to physiological and anatomical features of poplar tissues, the nature of soil pollution, as well as the intensity of human impact on the environment. In the polluted areas of the city the affinity of elements to accumulation in the depositing bodies of plants sharply changes. In the industrial zone of Kursk in the wood of poplar pyramidal mainly compartmentalized Pb, Cd and Ni, in the residential zone-Zn, Cu.