European Journal of Forest Research

, Volume 127, Issue 3, pp 173–182

Base-age invariant cork growth model for Spanish cork oak (Quercus suber L.) forests

  • Mariola Sánchez-González
  • Isabel Cañellas
  • Gregorio Montero
Review

DOI: 10.1007/s10342-007-0192-4

Cite this article as:
Sánchez-González, M., Cañellas, I. & Montero, G. Eur J Forest Res (2008) 127: 173. doi:10.1007/s10342-007-0192-4

Abstract

A cork growth model for Spanish cork oak forests was developed using data from 432 cork samples. Ten dynamic equations derived from the generalised algebraic difference approach (GADA) were considered for analysis, and both numerical and graphical methods were used to compare alternative models. All of the equations are base-age invariant and directly estimate accumulated cork thickness in complete years at any moment of the cork rotation. The fittings were done using the nested iterative method of the stochastic regression approach. The GADA formulation derived by Krumland and Eng (2005) from the Richards model by considering a1 and a3 as related to site productivity was finally selected. The cork growth model developed in this study allows the total accumulated cork thickness in complete years to be estimated in the fourth year of cork rotation with close to 80% reliability for any debarking period, increasing to nearly 90% from the eighth year onwards.

Keywords

Cork growth Cork thickness Dynamic equation Generalised algebraic difference approach Nested iterative method 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Mariola Sánchez-González
    • 1
  • Isabel Cañellas
    • 1
  • Gregorio Montero
    • 1
  1. 1.Centro de Investigación Forestal, INIAMadridSpain

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