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Gewählte Master / Diploma Thesis:

Roman Spechtenhauser (2011): Waldbauliche Analyse von Eichenmischwäldern in Südtirol.
Master / Diploma Thesis - Institut für Waldbau (WALDBAU), BOKU-Universität für Bodenkultur, pp 190. UB BOKU obvsg FullText

Data Source: ZID Abstracts
The current knowledge and experiences for silvicultural measures concerning the production of valuable hardwoods can be classified as limited in South Tyrol. Therefore this master thesis aimed to develop a silvicultural treatment model for the oak forests by means of demonstration sites. The existing concept of demonstration sites was adapted to hardwood forests in order to determinate the available growth and production potential of the mixed oak stands. Data investigation was done in 9 forest stands dominated by Sessile Oak (Quercus petraea (Matt.) Liebl.), whereas 2 sites were classified as thicket and 7 sites as pole stand comprising one site as demonstration plot. With a mean tree height of 18 m and a DBH of 30 cm for Sessile Oak the mean height of the productive primary crown was 12,6 m, the height of the first dead branches was 6,6 m were as the height of the secondary crown was 3,2 m. The total length of the knotless trunck considered 7 m is therefore out of reach. The relation between the share of individuals origin from sprouting or seed varies between the sites moreover it decreases with growing DBH class. The mean number of valuable crop trees linked to quality class A or B is between 50 to 60 Individuals / ha. In the context of the descriptive analysis of the stand characteristics it was found, that the most promising sites show a potential for a hardwood production. However, most of the sites are single layered, which reduces the options for growing valuable timber. The analysis of the thicket phase indicated that more than 10.000 Individuals / ha with up to 12 tree species increase the decision space for possible silvicultural options. The existing concepts about the treatment of oak forests described in scientific literature have been critically evaluated in order to develop a sound model for the specific environment in South Tyrol. The model aims at a total number of 70 crop trees/ha with a target diameter of 60 cm within a rotation period of 120 years. The concept described was implemented on the sites and only one site allowed to identify the needed number of crop trees. The discussion and conclusions allow to draw some general recommendations for the silvicultural treatment of the oak forests and critically reflect the described concept.

Beurteilende(r): Vacik Harald
1.Mitwirkender: Hochbichler Eduard

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