Характеристика насадження дуба червоного в природному заповіднику «Медобори»

Abstract

It has been established that in the Medobory Nature Reserve the red oak (Quercus rubra L.) plantations are introductions, that occupy an area of 235.5 hectares (with 3 or more units in the stand), all of which were created artificially before the reserve was established. The main taxonomic indicators of the red oak stands were analyzed from the quarterly results of the Taxonomic Description of the Medobory Nature Reserve. The age analysis of the studied stands was carried out: young stands occupy 6.4%, middle-aged stands – 88.8%, ripening stands – 0.6%, mature and overstocked stands – 2.9%. It has been found that stands of red oak grow in five types of forest vegetation conditions: wet hornbeam-beech oak forest (15.2%), wet hornbeam oak forest (17.4%), fresh hornbeam-beech oak forest (30.9%), fresh hornbeam oak forest (34.2%), and fresh hornbeam sub-forest (2.3%). The stands with red oak are mostly simple in terms of their layers. It has been established that all oak forests are characterized by high productivity and grow in the first and above the first class of bonita. 63.9% of the stands are high-completeness, and there are no low-completeness stands. Under the stand canopy, red oak forms a significant number of undergrowth individuals, but it dies rather quickly, unable to withstand the shading of the mother species. The herbaceous cover in allotments of this type is very depleted due to thick, undecomposed leaf litter. The following components were subjected to mathematical analysis: age, diameter, completeness, and stand stock. Based on the calculated standard deviation and coefficient of variation, it can be concluded that the range of variation of the “completeness” indicator is characterized by a low value of the trait variation, and the range of variation of the “stock” indicator is medium. Other indicators have a wide range of dispersion in the studied populations.