Skip to Main Content
Seedfall in a young-growth Douglas-fir stand: 1950-1978.Author(s): D.L. Reukema
Source: Canadian Journal of Forest Research. 12(2): 249-254
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (756 KB)
DescriptionA 29-year record of seedfall in thinned and unthinned portions of a Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand, spanning ages 39 through 68, reveals annual seed production from no seeds to about 3 million per hectare. For the nine largest crops, annual seedfall in the best seed-producing thinning treatment included at least 100 000 filled seed per hectare. The first of these nine crops was in 1950; the other eight occurred at 1- to 4-year intervals beginning with 1959. For the nine largest crops, the proportion of seeds filled averaged 45%o and ranged from 30 to 54%. Typically, about two-thirds of the seed fell by mid- December; but for two of the three largest crops. time of seed shedding was greatly delayed. Thinning substantially increased the number of seeds produced in some years following thinning but the effect was not lasting. There was little or no effect of thinning on the proportion of seed filled or timing of seed dissemination.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationReukema, D.L. 1982. Seedfall in a young-growth Douglas-fir stand: 1950-1978. Canadian Journal of Forest Research. 12(2): 249-254
- Seed dissemination in small clearcuttings in north-central California
- Estimating seed crops of conifer and hardwood species
- Seedfall and seed viability within artificial canopy gaps in a western Washington douglas-fir forest
XML: View XML