Architectural and Constructional University, Azerbaijan
Central Botanical Garden, Azerbaijan National Academy of Sciences
For evaluating the state of beech stands in the northern region of the Republic, 16 plots in 3 farms were established. The state of stands is determined by the external characteristics of the leaves and branches of the crown of trees under different growing conditions. As a result of the conducted studies it was revealed that the number of damaged trees were different according to the degree of defoliation of leaves within forest types and wood species: in the dead cover type- beech -3-6% hornbeam - 17-21%; in fescue - beech 26-32%, hornbeam - 31-40%, oak - 39-42%. In the examined stands according to the degree of leaf dechromation healthy trees prevail, which makes up 87%, 74% and 57% of the total, respectively. The study of the distribution of trees by the number of dry branches showed that in the dead cover type of forest, basis of the plantations belongs to the trees of the 1st class of damage (dry branches in the crown of 10%), in the fescue - 2nd class of damage (16-40%). According to the index of tree damage, the studied plantations are healthy in the dead cover type of the forest, weakened in the mixed grass, and greatly weakened in the fescue grass.