Growht and Development of Individual Douglas-fir in Stands for Applications to Simulation in Silviculture

1991

S. 651-666

11 Abb., 3 Tab., 39 Lit. Ang.

Unselbständiges Werk

200041335

Growht and development of individual Douglas-fir (Pseudotsuga menziesii (Mirb) Franco) were studied on the basis of a sample of 44 trees felled in the north east of France, taking into consideration various stand conditions. This work was conducted with a view to future use of the information in a simulation system, to predict the effects of silvicultural treatments on Douglas fir stands. Stem and branches were analysed in all trees, and relationships combining branch growth with growth and development of crown and stem were obtained. These relationships give insight into interactions between tree growth and stand dynamics. Among the prediction equations obtained, a major one was tested on a further 12 newly felled trees, analysed for past bole increments and crown development reconstruction. This suggested the use of a scaling factor to correct a possible underestimation.