Eucalyptus globulus Coppices in Portugal: Influence of Site and Percentage of Residues Collected for Energy

Isabel Malico and Ana Cristina Gonçalves
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Isabel Malico: Departamento de Engenharia Mecatrónica, Escola de Ciências e Tecnologia, Universidade de Évora, Rua Romão Ramalho 59, 7000-671 Évora, Portugal
Ana Cristina Gonçalves: Departamento de Engenharia Rural, Escola de Ciências e Tecnologia, Instituto Mediterrânico de Agricultura, Ambiente e Desenvolvimento (MED), Instituto de Investigação e Formação Avançada, Universidade de Évora, Apartado 94, 7002-544 Évora, Portugal

Sustainability, 2021, vol. 13, issue 11, 1-14

Abstract: Studies that quantify forest bioenergy potentials hardly address the questions of site quality, proportion and type of residues removed from the stands, and environmental impacts of those removals. However, those factors are important for energy-potential results and forest sustainability. This study compares, in terms of residual biomass availability for energy production and of sustainability, different locations, site indices, and forest management strategies in Eucalyptus globulus stands for pulp and paper in northern and central Portugal. A growth and production simulator was used to calculate the availability of residues and the area needed to supply a biomass-fired power plant under a variety of scenarios. Regions with more rainfall generate more residues, but site index and quantity and type of residues harvested are the most important factors. Under the different scenarios analyzed, the amount of residues potentially harvested range from 0.7 to 4.3 Mg ha ?1 a ?1 , the upper bound corresponding to a scenario where stumps are valorized. The maximization of residue removal maximizes the bioenergy produced but has to be considered prudently. Studies indicate that stump removal has limited effect on Eucalyptus globulus stand productivity, diversity, and system sustainability, but impacts of residue removals increase with a decrease in site index.

Keywords: bioenergy; biopower; energy potential; growth and production simulator; silviculture; site index; environmental impacts (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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