The main subject of the diploma thesis was the comparison of the various successive stages in chosen localities in Pohorelá area. The fieldworks were focused on the earmarking of plots representing the various stages of secondary succession and making the phytosociological relevés. The processing of the obtained data consisted of evaluation of the phytosociological situation and chosen structural characteristics of vegetation (life forms, species diversity) as well as the quantification of chosen production qualities of vegetation on the analysed plots.The studied localities have been used for an intensive pasture and sowing in the past. Nowadays, there is only the occurrence of occasional pasture. This fact is reflected in the species composition of the vegetation communities and in the gradual overgrowing of pastures due to the secondary succession. Grasses (in particular Nardus stricta L., Festuca rubra L. and Festuca ovina L.) were frequently replaced by shrubby species and in the areas with advanced secondary succession also by the climax woody plants, above all by the Norway spruce, Picea abies (L.) Karst.The thesis also contains information about the dominance and abundance of recorded plant species, as well as about the species richness and diversity. In general, the highest values of species richness, total herb layer cover and Shannon index of species diversity were recorded in areas representing meadows and initiall or moderately advanced stages of secondary succession.The above mentioned finding are also related to the feed potential that, in most cases, decreases with the advancing secondary succession. However, the melliferous and phytotherapeutic potential have usually higher values on the plots with secondary succession than on the meadows. The obtained results are significantly influenced by the increased occurrence of Vaccinium myrtillus L.