Above-ground biomass equations for Pinus radiata D. Don in Asturias

E. Canga, U. Diéguez-Aranda, A.K. Elias, A. Cámara


Aim of the study: The aim of this study was to develop a model for above-ground biomass estimation for Pinus radiata D. Don in Asturias.

Area of study: Asturias (NE of Spain).

Material and methods: Different models were fitted for the different above-ground components and weighted regression was used to correct heteroscedasticity. Finally, all the models were refitted simultaneously by use of Nonlinear Seemingly Unrelated Regressions (NSUR) to ensure the additivity of biomass equations.

Research highlights: A system of four biomass equations (wood, bark, crown and total biomass) was develop, such that the sum of the estimations of the three biomass components is equal to the estimate of total biomass. Total and stem biomass equations explained more than 92% of observed variability, while crown and bark biomass equations explained 77% and 89% respectively.

Keywords: radiata pine; plantations; biomass.

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DOI: 10.5424/fs/2013223-04143

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