Abstract
The radial growth of the trunks of the following flora species which do not have special protection on the southern hillsides of Greater Caucasus was studied in the article: Georgioan oak- Quercus iberica M.Bieb Common hornbeam - Caprinus betulus L. Common chestnut - Castanea sativa Mill. Black walnut - Juglans nigra L., Heart leaved alder - Alnus subcordata C.A.Mey. During the dendrochronological analyses, the dynamics of growth over the years were analysed based on the distances between the tree rings. The impact of the climatic factors on the growth of the trees was analysed and the ages of tree species were investigated.
 Based on the dendrochronological historical application, according to the numbers of tree rings, the ages of the trees were defined in the studied species. According to the numbers of tree rings, the oldest type of the rare and scanty flora types which have no special protection was identified as Caprinus betulus L. in the Zagatala region. The tree was taken from Zagatala district, planted in 1944, was 75 years old and had 330 cm diameter. The observation of dendrochronological researches indicates the formation of a new microclimate. It was observed that in the investigated species, radial growth was more intense during matureness, then it was weakened with age. In the comparative analysis, it was observed that the minimum radial growth was in 2010 and 2015, and the maximum growth was between 1973 and 1985 in the Zagatala region
Highlights
For the restoration of the soil and climatic conditions of the country, the protection, as well as restoration works of existing forests together with the establishment of new forests, is a requirement of the day
We have dedicated this research to the dendrochronology of the Quercus iberica M.Bieb and Caprinus betulus L. which grow in the forests in the Zagatala region
Zagatala region is rich in various types of trees such as Castanea Mill., Corylus L., Caprinus L etc (Mammadov T.S., 2011)
Summary
For the restoration of the soil and climatic conditions of the country, the protection, as well as restoration works of existing forests together with the establishment of new forests, is a requirement of the day. There has been extensive research for studying biometric analysis and dendrochronology of processes occurring in populations of rare species of natural and cultural flora. The possibility to increase tree types that meet predetermined qualities will enable the wood to be used effectively. For this reason, we have dedicated this research to the dendrochronology of the Quercus iberica M.Bieb and Caprinus betulus L. which grow in the forests in the Zagatala region. The study of species has created conditions for the study of anthropogenic impact on the vegetation of Azerbaijan, the monitoring of the vegetation of specially protected areas, the study of the phenogenetic differentiation of the populations and the recultivation of technogen landscape
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