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Improving estimations of maximal stand density by combining Reineke's size-density rule and the yield level, using the example of spruce ( Picea abies (L.) Karst.) and European Beech ( Fagus sylvatica L.) = Amélioration de l'estimation de la densité maximale de peuplement combinant la loi de taille-densité selon Reineke au niveau de production, à l'exemple de l'épicéa commun ( Picea abies L. (Karst.)) et du hêtre ( Fagus sylvatica L.)

Schütz, Jean-Philippe ; Zingg, Andreas

In: Annals of Forest Science, 2010, vol. 67, no. 5, p. 507-507

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    Title
    • Improving estimations of maximal stand density by combining Reineke's size-density rule and the yield level, using the example of spruce ( Picea abies (L.) Karst.) and European Beech ( Fagus sylvatica L.)
    Translated Title ()
    • Amélioration de l'estimation de la densité maximale de peuplement combinant la loi de taille-densité selon Reineke au niveau de production, à l'exemple de l'épicéa commun ( Picea abies L. (Karst.)) et du hêtre ( Fagus sylvatica L.)
    Author
    • Schütz, Jean-Philippe. WSL, CH 8093, Birmensdorf, Switzerland
    • Zingg, Andreas. WSL, CH 8093, Birmensdorf, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Annals of Forest Science, 2010, vol. 67, no. 5, p. 507-507. Springer Netherlands
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:314522
    Summary
    • The Reineke Stand density rule relating stem numbers to the quadratic mean diameter is generally used as a reference for modelling maximal stand density. • The linearity of this relationship after double logarithmic transformation is generally assumed, but it must be questioned for untouched stands and stands with a conventional thinning regime. Curvilinearity is demonstrated for some spruce and beech stands in Switzerland and shown to be statistically representative. This relationship is independent of the site index. It can be interpreted as a change in mortality in young stages mainly due to competition and in older stages more to ageing. • A more accurate estimation of the maximal stand density needs to take into account the important variation around the mean course, known as the yield level. A simple method to assess the yield level of any stand regardless of whether it is thinned or not is presented, based on estimating the effect of a stand opening on the basal area