HEALTH CONDITION OF TREES UNDER VARIOUS ANTHROPOGENIC INFLUENCES IN PLANTATIONS OF POLTAVA

The article presents the results of the analysis of the distribution and health condition of trees of six tree species (Acer platanoides, A. negundo, Aesculus hippocastanum, Tilia cordata, Betula pendula, and Robinia pseudoacacia) in the plantations of Poltava. These trees are affected by restriction of root growth, pruning, vehicle emissions, and a combination of these effects. The prevalence of trees of each species in the absence of anthropogenic impact and with anthropogenic impact was determined as the proportion of trees in percentage of all recorded trees of this species that are exposed to a certain impact. The health index was calculated for groups of trees of each species exposed to the effects of one or more anthropogenic factors. It was found that the most widespread trees are: with restricted root growth – B. pendula, with signs of pruning – R. pseudoacacia; with simultaneous impact on roots and crowns – Aes. hippocastanum and T. cordata; under the influence of vehicle emissions – B. pendula and Aes. hippocastanum; under the simultaneous influence of all these factors – T. cordata and Aes. hippocastanum. About half of the A. platanoides and A. negundo trees showed no signs of influence from anthropogenic factors, slightly more than a third of the R. pseudoacacia and B. pendula, and less than 20% of the T. cordata and Aes. hippocastanum specimens. Most of the trees are weakened (index above 1.5). Aes. hippocastanum trees are significantly weakened by long-term defoliation caused by Cameraria ohridella. With increasing anthropogenic impact, the health index of all species tends to increase. At the same time, it is necessary to consider the age of trees and the effect of biotic factors specific to individual species.