ZLV Online

Abstrakt

The subject of the research is to increase the stability of beech forests (Fagus sylvatica L.) by transforming them into forests of diameter classes. At the beginning of the experiment, the stands were 80 years old. Their transformation into the selection forest or the mosaic structure begun 24 years ago. The aim of the research was to obtain the information necessary for the design of models of beech selection forest and beech mosaic stand. The analyzed stands had a moderately differentiated height structure at the beginning of the experiment. In the permanent research plots (PRP 1-2) during 24 years of conversion and application of selective thinning and later selective cutting with an intensity of 14–18%, the phase of refinement of the selection structure took place. Based on the data analysis, we derived beech forest model with a target diameter of 50 cm, an optimal volume of 307 m³ ha^-1 and a basal area of 27 m² ha^-1. The conversion of beech stand on PRP 3 to the mosaic structure resulted in the proposal of the model characterized by the Weibull diameter distribution (target diameter 50 cm, basal area 31 m² ha^-1, model stand volume 392 m³ ha^-1).