330-7 A Tool for Estimating Nutrient Fluxes In Harvest Biomass Products for 30 Canadian Tree Species.

Poster Number 1214

See more from this Division: S07 Forest, Range & Wildland Soils
See more from this Session: Forest Soils Nutrient Dynamcis
Wednesday, November 3, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
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David Pare1, Evelyne Thiffault2, Brian D. Titus3, Pierre Bernier2 and Benoit Lafleur2, (1)Laurentian Forestry Centre, Natural Resources Canada, Quebec, QC, Canada
(2)Canadian Forest Service, Laurentian Forestry Centre, Natural Resources Canada, Québec, QC, Canada
(3)Canadian Forest Ser vice, Pacific Forestry Centre, Natural Resources Canada, Victoria, BC, Canada
Published information on nutrient concentrations in four tree biomass components (stem bark, stem bole, branches, foliage) were compiled from existing databases and form the literature for the 30 most important Canadian tree species. This database was linked to a series of allometric biomass equation that have been validated at the national scale to generate estimates at the tree or at the stand level of biomass and nutrient export upon stem-only or whole tree harvesting. Confidence interval s are provided for each component. An analysis of how these nutrient fluxes vary with tree species, stand basal area and components of biomass harvested (branch, bark, trunk, foliage) was performed. There was a clear distinction between deciduous and coniferous species for nitrogen content but large overlaps for other elements, in particular phosphorus. Calcium and magnesium contents are correlated within deciduous species.  The calcium content of coniferous species is generally lower than that of deciduous with the exception of Thuja species showing the greatest concentrations. This database could help defining sites that are vulnerable to intensive biomass extraction and help with the selection of species better suited to given site conditions.

 

See more from this Division: S07 Forest, Range & Wildland Soils
See more from this Session: Forest Soils Nutrient Dynamcis