Popis článkuPorovnanie rastu jedle bielej (Abies alba Mill.) v rovnorodom a zmiešaných porastoch smreka, jedle a buka.
[Comparison of growth of Silver fir (Abies alba Mill.) in pure and mixed spruce, fir and beech stands] 94-101
|Porovnanie rastu jedle bielej (Abies alba Mill.) v rovnorodom a zmiešaných porastoch smreka, jedle a buka
The paper deals with evaluation of silver fir growth in the four experimental plots situated in more-less monospecific or mixed spruce, fir and beech stands in Slovakia. No interventions on the mentioned plots were carried out for the investigated period of 45 to 50 years. Comparison of height growth course and selected quantitative characteristics (current annual basal area increment, relation between current annual diameter increment and crown width) were found. The results showed substantial decrease of silver fir from 7% to 30% out of total basal area, whereas original proportion was found 21–51%. On the contrary, the highest share was registered on all plots for beech. Actually, on pure fir stand the proportion of this species increased during the investigated period. On the mentioned stand, the best height growth was found in a consequence of the best site index, as well as the highest values of crown width and basal area increment. The closest relation between crown width and annual diameter increment was found on plots with the lowest number of trees. Results suggested that fir proportion and its growth in mixed stands with spruce and beech was markedly influenced by the latter tree species, which is considered to be a strong competitor under the given ecological conditions.