A site-index model for pure and mixed stands of Betula pendula and Betula pubescens in Sweden

A site-index model was constructed based on stem analysis data for 266 top-height trees of Betula pendula Roth and Betula pubescens Ehrh. growing on 155 temporary sample plots and 12 remeasured, permanent sample plots in pure and mixed stands scattered throughout Sweden. Different growth functions a...

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Bibliographic Details
Published in:Scandinavian journal of forest research 1997-01, Vol.12 (2), p.149-156
Main Authors: Eriksson, H, Johansson, U. (SLU, Uppsala (Sweden). Inst. foer Skogsproduktion), Kiviste, A
Format: Article
Language:English
Subjects:
ARBOLES FORESTALES
ARBRE FORESTIER
BETULA PENDULA
BETULA PUBESCENS
birch
BOSQUE MIXTO
CARACTERISTICAS DEL RODAL
CARACTERISTICAS DEL SITIO
CARACTERISTIQUE DU PEUPLEMENT
CRECIMIENTO
CROISSANCE
deviation method
difference models
FACTEUR LIE AU SITE
FORET MELANGEE
height growth functions
MODELE
MODELOS
PEUPLEMENT FORESTIER
RENDEMENT DES CULTURES
RENDIMIENTO DE CULTIVOS
RODALES
site-index models
SUECIA
SUEDE
TECHNIQUE DE PREVISION
TECNICAS DE PREDICCION
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Summary:A site-index model was constructed based on stem analysis data for 266 top-height trees of Betula pendula Roth and Betula pubescens Ehrh. growing on 155 temporary sample plots and 12 remeasured, permanent sample plots in pure and mixed stands scattered throughout Sweden. Different growth functions and techniques for modelling the top-height growth over breast-height age were assessed. A difference model based on the Hossfeld IV growth equation performed best, and its practical application was therefore recommended. For birch stands over 40 yrs of age, top-height growth predicted by the new model was significantly slower than that predicted by a site-index model used previously.
ISSN:0282-7581
1651-1891
DOI:10.1080/02827589709355396