Abstract

HERNANDEZ-RAMOS, Jonathan et al. Site index for Pinus greggii Engelm: Plantations in Metztitlán, Hidalgo, Mexico. Rev. Chapingo ser. cienc. for. ambient [online]. 2014, vol.20, n.2, pp.167-176. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2013.04.016.

Productivity indices are essential to sustainable forest management planning. Site Index is the primary method used to classify the quality of forest sites. However, this information is not available to aid in the planning of silvicultural interventions for most forest stands and plantations. Therefore, the objective was to estimate the site index for forest plantations of Pinus greggii Engelm., which were already established in the mountainous region of the municipality of Metztitlán, Hidalgo. Schumacher, Chapman-Richards and Weibull functions were fitted to 233 age-height data pairs obtained from stem analysis. Based on the lowest value of the mean square error, the highest R² value and the distribution of residuals, the Schumacher model was selected for the construction of the guide curve and the families of anamorphic and polymorphic curves. Five site index labels were established for heights of 12, 14, 16, 18 and 20 m with site qualities of V, IV, III, II and I, respectively. A good representation of dominant height growth as a function of age was achieved given that all conditions existing within the plantations were considered in the models.

Keywords : Site quality; Schumacher model; growth; dominant height; guide curve.

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