Stem Volume and Wood Relative Density of a Non-Local Douglas-fir Provenance in British Columbia

1991

S. 29-35

4 Abb., 9 Tab., 20 Lit. Ang.

Unselbständiges Werk

200051244

Incremental and cumulative volume growth from ages seven to 16 years and wood relative density to age 16 of five standard and three local Douglas-fir provenances were studied at three test sites in coastal British Columbia. Growth patterns were examined to determine whether the fastest growing most southerly provenance from Hoh, Washington maintained a growth rate advantage over the other provenances. The Hoh provenance performed consistently well at all sites and maintained its relative volume advantage between the ages of seven and 16. Volume and wood relative density were negatively correlated on a provenance mean basis. Thus the advantage of the Hoh provenance was reduced from 39% in volume to 36% in stem dry weight. This may not reflect the influence of the negative correlation on value, however, if strength becomes an issue in determining value for coastal Douglas-fir. There was no consistent relationship between volume and relative density within the provenances.