3PG-Out+ model was conceived to project the growth of pure eucalyptus stands in Portugal accounting under alternative climate and management scenarios. This model is based on 3PG model, a process-based model based on intercepted radiation (Landsberg and Waring 1997) that was parameterized for Eucalyptus globulus in Portugal (Fontes et al. 2006). In 3PG-Out+ the module responsible for generating forest managers most important outputs (basal area and volume) was replaced by a set of sub-models resulting from hybridizing it with Globulus 3.0 empirical model through the development of link function based on allometric functions (Tome et al. 2004).

3PG-Out+ simulates the growth of eucalyptus forest managed as plantation or coppice (Barreiro et al. 2011) through the implementation of a calendar of silvicultural operations expressing different management scenarios that can be combined or not with climatic scenarios.

There is a video available describing this model.


Barreiro S, 2011. Development of forest simulation tools for assessing the impact of different management strategies and climatic changes on wood production and carbon sequestration for Eucalyptus in Portugal. PhD thesis. Universidade Técnica de Lisboa, Instituto Superior de Agronomia, Lisboa, Portugal. http://hdl.handle.net/10400.5/5216

Fontes L, Landsberg JJ, Tomé J, Tomé M, Pacheco CA, Soares P, Araújo C, 2006. Calibration and testing of a generalized process-based model for use in Portuguese eucalyptus plantations. Canadian Journal of Forest Research, 36: 3209-3221.

Landsberg JJ, Waring RH, 1997. A generalised model of forest productivity using simplified concepts of radiation-use efficiency, carbon balance and partitioning. Forest Ecology and Management 95: 209-228. (DOI: http://dx.doi.org/10.1016/S0378-1127(97)00026-1)

Tomé M, Faias SP, Tomé J, Cortiçada A, Soares P, Araújo C, 2004. Hybridizing a stand level process-based model with growth and yield models for Eucalyptus globulus plantations in Portugal. In: Borralho NMG, Pereira JS, Marques C, Coutinho J, Madeira M, Tomé M (Eds.), Eucalyptus in a changing world. Proc. Iufro Conf., Aveiro, 11-15 Oct. (RAIZ, Instituto deInvestigação da Floresta e do Papel, Portugal), pp.290-297.

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