ZLV Online

Abstrakt

Climate oscillations have been affecting forests over last years, and a shift in tree species composition is expected. The objective of this study is the development of three model tree species compositions with different share of the natural regeneration of target and pioneer species and the evaluation of the reforestation costs and the costs of plantation establishments. The species compositions were composed according to the basis for the determination aggregated target species composition (ÚHÚL 2019a). The stand type of oak of the normal quality represented lower-altitude-sites, and the stand type of beech of the normal quality represented higher-altitude sites. The potential value of the rotation age stands (120 years) was also assessed. The regeneration costs and the costs of the stands’ establishment were calculated using the output standards. The calculation included the really reported natural regeneration. Model A was composed of targeted species, Model B contained 20% of pioneer species and Model C consisted of 40% pioneer species. The results at all sites confirmed a decrease in the costs of regeneration and stands’ establishment, which corresponded to the natural regeneration share. The value of the rotation aged stands, which contained the significant share of pioneer species, mostly did not achieve the value level of the stands with the standard species composition (Model A). It will be important to focus the attention to the selection of a suitable species composition used for the forest regeneration and to the quality of the stand tending. The stands that regenerated by a new species, through spatially and time differentiated composition should be able to create the high value of the society-wide functions appropriately.