This publication characterizes nine commercial tree species of Alberta. Included are descriptions of the range and volume of each species, their wood properties, and present and potential manufacturing uses.
The phenotypic correlation between wood density and stem growth (tree height and diameter) was examined in young interior spruce. The sample trees represented 40 half-sib families in two progeny test sites in British Columbia. In general, the relationship was found to be negative and weak. There were individual trees and families that showed fast growth and above-average wood density. If genetic correlations are equal to or weaker than the phenotypic correlations, and if the correlations persist in mature trees, it would be possible to select individual trees and families for fast growth without reducing wood density.
Pith-to-bark increment cores were obtained at breast height from 199 interior Douglas-fir parent trees located in the east Kootenay region of British Columbia. The cores were divided into equal lengths and were analyzed separately for wood density. The half portion close to the pith (inner half) was used to estimate the juvenile wood density; the outer half was used to estimate the wood density of the mature volume of the tree. The outer half was significantly higher in wood density than the inner half. When compared to other parent trees of the same species located in other interior seed zones, the outer half of these east Kootenay trees had significantly lower wood density.