Modelling growth and development of natural regeneration of beech stands in South Belgium : Modelling Regeneration Success and Early Growth of Forest Stands. Proceedings from the IUFRO Conference held in Copenhagen, 10-13 June 1996

Horsholm

1996

S. 211-220

4 Lit. Ang.

Bandaufführung

78861

A model dealing with the natural regeneration dynamic of uneven-aged beech stands (Fagus sylvatica L.) has been developed for the South part of Belgium. This model, which is distance independent, predicts radial and height growth of installed young trees (height > 30 cm) in realtionship with individual parameters and surrounding mature stand density. this model also describes natural moratality in regeneration groups in relationship with dominant girth of these groups. A competition index has been created to combine the effect of both mature tree density in the vicinity of the groups and the social position in these groups on radial growth of the young trees. This index corresponds to a sum of basal area per ha of competing trees, the pressure of each competitor being weighted by the difference of size between the subject and the competitors. The resulting model explains more than 65% of radial growth variability. It is designed to work in connection with another tree-based distance independent model describing mature tree (girth at 1,5 m > growth associated with a simulator of silvicultural operations (thinnings) applied to the stand.