Die "Zielbaumerziehung" am Beispiel der Eiche : The target-tree training by example in oak stands

Alfeld

2006

4 Abb., 11 Lit. Ang.

Artikel aus einer ZeitschriftUnselbständiges Werk

4354

200128530

The silvicultural aim for oak stands consists in the cultivation of strong highly valuable trunks. This aim can be achieved in a relatively short time by "target tree training". Each tree contains two productive areas: 1. the grown, 2. the root. For financial reasons, production should focus on the trunk base (= first 5 meters on the trunk). One indispensable strategy beyond this background consists in "thinning just at time". Very often, thinning starts too late and the repetition intervals are too large. The result of the missing tending is a very low percentage of highly valuable timber. A strategy focussing on valuable timber has to calculate the necessary crown space of the target tree following the idea that no green branch dies after the branch free zone has reached the envisaged height. Target trees should not have any stem zone with dead branches (A-C-consept). The result of such a thinning strategy can and should be controlled, because missing tending leads to incompensabe financial losses. Calculations on the maximum percentage of valuable timer show that it is not possible to produce more than 20% of highly valuable (= branch free) timer/stand taking into account timber volume from thinning, crown material and also branchy timber in the first 5 m of the trunk. Some results from three sample plots in the research forest district of the University for Applied Sciences, Rottenburg, highlighten the practical advantages from the above described thinning strategy.