Vol. 66 No. 5 (2011):
Articles

Comparison of generalised nonlinear height-diameter models for Pinus halepensis Mill. and Quercus cerris L. in Sicily (Southern Italy)

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  • Dora Cimini,
  • Riccardo Salvati
Dora Cimini
Dipartimento per la Innovazione nei Sistemi Biologici Agroalimentari e Forestali, Università della Tuscia
Riccardo Salvati
Dipartimento per la Innovazione nei Sistemi Biologici Agroalimentari e Forestali, Università della Tuscia
DOI: https://doi.org/10.4129/ifm.2011.5.03

Published 2011-10-30

Keywords

  • height-dbh equation,
  • non linear model,
  • large-scale level,
  • Pinus halepensis Mill.,
  • Quercus cerris L.

Copyright (c) 2011 Italian Journal of Forest and Mountain Environments

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Abstract

Various models of the relationship between tree stem height (h) and tree stem diameter at breast height (dbh) generalized by forest stand characteristics (stand dominant height, Hdom, and stand dominant dbh, Ddom) were compared to assess their prediction potential for Pinus halepensis and Quercus cerris in Sicily (Southern Italy). The models were designed to be used in a large scale level with a wide range of forest conditions. Comparison of the models was carried out by studying the bias, the root mean square error, the Akaike’s information criterion and the Pearson correlation coefficient between observed and predicted value. Among those compared, the most suitable model for both species proved to be:

hi = (1– eb1di)b2 Hdom 

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