Changes in tree species composition, stand structure, qualitative and quantitative production of mixed spruce, fir and beech stand on Stara Pila research plot
2006
Stefancik, I.(Lesnicky Vyskumny Ustav, Zvolen (Slovak Republic). Narodne Lesnicke Centrum) E-mail:[email protected]
The research was carried out on two series of permanent research plots with mixed (spruce-fir-beech) forest stands established in 1972 and situated in the 5th forest altitudinal zone in the central part of Slovakia. Each of the series consisted of three plots as follows: 1) tending by free crown thinning; 2) a non-whole-area tending; 3) control plot. Dynamic changes in tree species composition, stand structure, qualitative and quantitative productions were evaluated during 29 years. A market decrease in the proportion of coniferous trees by 7-28% accompanied by an increase in the proportion of broadleaved trees by 7-26% was found on all plots. The number of the trees of selective quality was higher in experimental than in control plots, it was the highest one on plots with non-whole-area tending. The total production was slightly higher in experimental than in research plots, the highest values were found for beech and Douglas fir.
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