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Gewählte Master / Diploma Thesis:

Jürgen Richter (2022): Waldbauliche Analyse von Eichenjungbeständen im Alpenvorland Oberösterreichs.
Master / Diploma Thesis - Institut für Waldbau (WALDBAU), BOKU-Universität für Bodenkultur, pp 77. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The main objective of this work is a silvicultural analysis and evaluation of oak-dominated mixed forest stands in the Alpine foothills of Upper Austria. The main focus is an analysis of growth performance and value-add potential, an evaluation of silvicultural measures and recommendations for future stand treatments. After the wind-throw event in 1990/91 in the northern alpine foothills, forest conversion took place in the damaged areas, aided by a state subsidy program and mixed afforestation. Following the initial surveys of these stands in 2002, 15 stands were selected for the 2019 follow-up survey, using a fixed sample circle inventory procedure. The 27-year-old stands are dominated by deciduous forest type(48.5%), followed by coniferous forest type(38.8%) and mixed forest type(12.6%). With a high diversity of tree species, the percentage of deciduous trees increased to 61.2% compared to the first inventory 2002, while the percentage of coniferous trees decreased to 38.9%. Among deciduous trees, the share of oak is 20% and that of red oak is 13%. With a mean stem number of 950 n/ha, the average stock is 240 Vfm/ha. The mean periodic diameter growth from the initial to the follow-up survey is 6.8 mm/year. There are currently about 65 future croptrees/ha on average in the stands, after branching up to 80 potential future crop trees/ha would be possible. Interesting is that after branching, besides 65 potential future crop trees/ha on average in the deciduous forest type, there are also 20 future crop trees/ha in the mixed forest type and especially 35 future crop trees/ha in the coniferous forest type. The mean stem number of oak is 240 n/ha with an average of 50 future crop trees/ha. The average periodic radial growth of oak and maple emerged from the studies as above average along with spruce. Insufficient silvicultural treatment and thinning measures endanger stand stability and lead to poor hardwood quality, which underlines the urgency of these measures.

Beurteilende*r: Hochbichler Eduard

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