Apply of increment criterion of a single tree felling maturity in a stand regeneration on the School Forest Enterprise Kostelec nad Černými lesy
2005
Remeš, J.,Czech Univ. of Agriculture, Praha (Czech Republic)
This paper describes the results of a research that is focused on an evaluation of even-aged nearly pure Norway spruce stand transformation on the School Forest Enterprise territory in Kostelec nad Černými lesy. This conversion is made by the differentiated regeneration that was started nearly 30 years ago. Tree species composition change is ensured by combine artificial and natural regeneration. More size and age diversification of the next forest stand will be achieved by the long-term final cutting. The final cutting is based on an individual tree selection. The culmination of mean annual volume increment is the main criterion of individual trees felling maturity, according to Poleno's idea. The current annual volume increment of a stand is importantly influenced by a stand density (number trees per hectare) and by individual growth potential of each tree. The tree-ring analyses of all trees brought an information about still very high current annual increment level of individual trees. On the base of evaluation of felling maturity, relatively low number of trees has been achieved to the mean annual volume increment culmination point. They are mostly trees of light-demanding species (Scots pine and European larch) and suppressed trees of shade tolerant species (Norway spruce and Silver fir). The tree release seems to be an important factor that influenced growth vitality of individual trees. It is documented by a very low number of trees after the increment culmination on the PRP 3 - only about 9 % from all trees opposite to approximately 30 % on the PRP l and PRP 2. These results indicate that this kind of felling maturity definition will probably lead to the long-term regeneration and consequently to more diversify forest stand.
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