The purpose of the master's thesis was to evaluate the success of natural and artificial regeneration of forests near Vrhnika, which were damaged by windthrow in 2017. The research was conducted in July 2020 on 30 sample plots (5 × 5 m). Ten sample plots were placed in the fenced research area with artificial regeneration; ten plots in the non-fenced research area with artificial regeneration. The remaining ten ones in the research area that was left to natural regeneration. We first evaluated coverage of brambles, herbs, shrubs, branches, rocks and adult trees. After removing the layer of herbs, we counted all the planted and natural seedlings. We estimated seedlings tree species, height class, damage and vitality. On the artificial regeneration plots, the planting density was 3,000 trees per hectare. The density of natural regeneration of climax species in the research area was between 6,440 and 4,600 trees per hectare. We have found that the tree species used for artificial regeneration, namely common oak, silver fir, beech, sycamore maple, Douglas fir and wild cherry, are suitable for this site so they should be considered in similar locations in the future. Due to the exclusion of large herbivores, on the fenced plot the vitality of all seedlings was greater and the mortality of planted seedlings was lower. Silvicultural treatment increased the vitality of natural and planted seedlings on the plots of artificial regeneration. The high layer of brambles, herbs and shrubs limited regeneration recruitment and the undisturbed development of natural and planted seedlings.
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