Abstract

CARVALHO, João P.. Uso da Propriedade da Aditividade de Componentes de Biomassa Individual de Quercus pyrenaica Willd. com Recurso a um Sistema de Equações Não-Linear. Silva Lus. [online]. 2003, vol.11, n.2, pp.141-152. ISSN 0870-6352.

The biomass as a measure of the primary yield of forest ecosystems has had an increased interest, mainly with tree species in which their crown is an usable component. In total tree biomass estimations, it is important to consider the property of addition of the stem and crown biomass components. In this work, two procedures are compared that apply the summation factor between the biomass components of Quercus pyrenaica Willd. trees, as applied to a specific case. Results show that the use of a process of simultaneous estimates of a system of equations, which impose restrictions in the estimate of parameters and considers the existence of a simultaneous correlation between residuals, results in the derivation of more efficient parameters giving more consistent intervals in the prediction of biomass estimates.

Keywords : Quercus pyrenaica Willd.; biomass; additivity; simultaneous estimation.

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