Abstract
Eucalyptus globulus is one of the most planted species in the Inter-Andean Valleys of Bolivia, where growing conditions are different from most places where eucalypts have been studied. This prevents a straightforward utilization of models fitted elsewhere. In this study a distance-independent individual-tree growth model for E. globulus plantations in Bolivia was developed based on data from 67 permanent sample plots. The model consists of sub-models for dominant height, tree diameter increment, height-diameter relationship and survival. According to model-based simulations, the mean annual increment with the optimal rotation length is about 13 m3 ha–1 yr–1 on medium-quality sites and 18 m3 ha–1 yr–1on the best sites. A suitable rotation length for maximizing wood production is approximately 30 years on medium sites and 20 years on the most productive sites. The developed models provide valuable information for further studies on optimizing the management and evaluating alternative management regimes for the species.
Highlights
Most of the growth and yield models that can be found in the literature for Eucalyptus globulus are for stand-level calculations (e.g. Tomé et al, 1995; Garcia and Ruiz, 2003; Wang and Baker, 2007). Goodwin and Candy (1986) and Soares and Tomé (2003) developed individual-tree growth models for E. globulus
In this study a distance-independent individual-tree growth model for E. globulus plantations in Bolivia was developed based on data from 67 permanent sample plots
In Bolivia, E. globulus plantations have been promoted since the 1960s
Summary
Most of the growth and yield models that can be found in the literature for Eucalyptus globulus are for stand-level calculations (e.g. Tomé et al, 1995; Garcia and Ruiz, 2003; Wang and Baker, 2007). Goodwin and Candy (1986) and Soares and Tomé (2003) developed individual-tree growth models for E. globulus. Goodwin and Candy (1986) and Soares and Tomé (2003) developed individual-tree growth models for E. globulus. Compared to stand level models, individual-tree models have higher resolution (Pretzsch et al, 2002) and allow detailed stand description and flexible simulations. They predict how competition affects individual trees allowing a logical simulation of tree size differentiation within a stand. There is a need for Bolivia-specific equations that would enable reliable growth and yield prediction of E. globulus to support plantation management and planning. The aim of the research work summarized in this article was to develop a system of models that enables the simulation of E. globulus stand dynamics on an individual-tree basis
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