The adjustment of global and partial dry biomass models for Pinus pinaster in the North-East of Portugal Conference Paper uri icon


  • Ecosystems net primary production quantification can be done by means of allometric equations. Carbon sequestration studies also involve the quantification of growth dry biomass, knowing the carbon percentage of dry biomass. Fieldwork complexity to collect these kind of data are often limitative for obtaining these mathematical models. Allometric equations were adjusted to estimate dry biomass of individual Pinus pinaster trees, using data from 30 trees. Statisticals form the final equations have shown that biomass estimation could be made under an accuracy of around 95%. All mathematical models were calculated using diameter at breast height (dbh) as independent variable and enable to estimate biomass (in Kg) for: stem (R2adj=97.9); crown (R2adj=88.4) and roots (R2adj= 93. 5).

publication date

  • January 1, 2005