Entwicklung mechanischer Stabilitaetsmerkmale in Fichtenstangenhoelzern in Oberoesterreich

1995

S. 21-35

13 Lit. Ang.

Unselbständiges Werk

200068698

Silva Gandavensis 1995 ; Nr. 60, S. 21-35

In Central Europe, Spruce forests play an important role in forestry and wood production and cover large surfaces. This study focuses on the mechanical stability of monocultural, evenaged spruce stands. Measurements were taken in three different forests in the Western part of Oberoesterreich (Austria). Two of them belong to farmers, the third, the "Weilhartsforst" is run as a private business. In 18 plots of 20 by 20 meters, an inventory of diameter, height, crown length, social position and damage by deer was made. This data were statistically analysed on al parameters in relation to management and eld. The h/d ratio was used as main parameter, as it is in many Austrian stability studies. Generally, the mechanical stability of the spruce stands is insufficient, which is the result of the treatment. A strong thinning, by cutting neighbouring trees of all candidates will give a satisfactory h/d ratio. There was found that a first stem reduction should take place in the first 10 years, and a first thinning 5 to 7 years later. Dominant trees are the most stable ones, but also the most attractive for deer. To prevent damage, a good wildlife management is necessary. By selecting the dominant trees and following a consequent thinning, one creates a very uniform stand. This seems to be the most mechanically stable, following the results of the research, but it is known as ecologically dangerous.