In this work the growth of Norway spruce (Picea abies) and European beech (Fagus sylvatica) on steep slopes in Bohinj was analysed. Spruce and beech tree were selected at different inclinations, elavations and aspects. In total, 60 spruce trees and 60 beech trees mostly of dominant and co-dominant social layer were analysed. On each tree two increment cores were taken, on the stump and at the breast height (1,3 meter above ground). The spruce trees were on average higher and a bit younger. Average diameter and height increments of beech were lower in comparison with spruce. The strongest effecton growth rates had tree age. Spruce trees with released crowns had wider tree-rings, what does not hold true for beech trees. The dependence of tree-ring width on climate variables was mainly statistically nonsignificant, with the small exception of August temperatures.
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