Preliminary yield models for evenaged stands of Pinus nigra Arn. in the catalan pyrenees

Abstract

Three detailed management models are developed for even-aged black pine (Pinus nigra Arn.) stands of the Pyrenees. These models consist of a descriptive part, named Final Stand Type, from the first thinning to the regeneration concepts. Several goals to be reached in terms of final medium diameters and rotations are defined for each site index class. This part is complemented by Management Tables that represent quantitatively the stand evolution according to the proposed treatment regimen.Starting by a selective thinning combined with low thinning, weights and rotations of interventions are spread out at intervals depending on the growth dynamics of the species in the different site index classes. Finally, comparative economic valuation is carried out between the proposed models and the management as uneven-aged forest, which is the traditional management method of these stands in the Pyrenees.