RECLAMATION POTENTIAL OF GREEN SPACES IN NOVOCHERKASSK, ROSTOV REGION

Abstract

Purpose: to assess the reclamation potential of green spaces in Novocherkassk, Rostov region. Materials and methods. Heavy metals gross forms content determination: zinc (Zn), lead (Pb), cadmium (Cd), nickel (Ni), cobalt (Co), manganese (Mn), copper (Cu) – and their total value in the leaf mass of woody plants: horse chestnut (Aesculus hippocastanum), small-leaved linden (Tilia cordata), Norway maple (Acer platanoides), green ash (Fraxinus excelsior), black locust (Robinia pseudoacacia), Canadian poplar (Populus canadensis), growing on the territory of typical objects of park landscapes located in different parts of the city with increased technogenic load, was carried out using the method of plasma atomic absorption spectrometry (AA-method). Results. The obtained data allowed us to determine the total accumulation index of heavy metals by adding these elements together, expressed in milligrams per kilogram. The highest amount of Zn (69.01 mg/kg) is contained in the leaves of the Canadian poplar in the park of the Donskoy microdistrict, Pb (2.87 mg/kg) and Cd (0.128 mg/kg) are found in the horse chestnut in the park on Troitskaya Square. Based on the obtained data, diagrams for the content of each metal in the woody plant species accepted for the study and the total accumulation index at all study sites were constructed. Conclusions: the analyses performed to assess the metal-accumulating capacity allowed to identify woody plant species whose phytomass, under conditions of significant technogenic load, extracts heavy metals from the biogeochemical cycle to the maximum, and they can be recommended for cultivation in urbanized areas of the steppe zone in the North Caucasus.

Keywords

• reclamation potential of plantings
• park landscapes
• urbanized territories of the steppe zone
• technogenic load
• heavy metals