Skip to Main Content
Family differences in equations for predicting biomass and leaf area in Douglas-fir (Pseudotsuga menziesii var. menziesii).Author(s): J.B. St. Clair
Source: Forest Science. 39(4): 743-755
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (870 KB)
DescriptionLogarithmic regression equations were developed to predict component biomass and leaf area for an 18-yr-old genetic test of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco var. menziesii) based on stem diameter or cross-sectional sapwood area. Equations did not differ among open-pollinated families in slope, but intercepts assuming equal slopes did differ for equations predicting leaf, branch, or bark biomass, or leaf area. These results may be explained by family differences in partitioning between stemwood and bark and between stem and crown. Predictions of biomass and leaf area based on equations developed in this study differed from predictions based on equations from other studies by as much as a factor of two, suggesting that discretion is needed when applying equations to other sites at other stages of stand development and with other ranges of tree sizes.
- You may send email to email@example.com 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.
CitationSt. Clair, J.B. 1993. Family differences in equations for predicting biomass and leaf area in Douglas-fir (Pseudotsuga menziesii var. menziesii). Forest Science. 39(4): 743-755
KeywordsPlant biomass, leaf area, partitioning, allometric equations, genetic variation
- Spatial relationship of biomass and species distribution in an old-growth Pseudotsuga Tsuga forest.
- Incorporating genetic variation into a model of budburst phenology of coast Douglas-fir (Pseudotsuga menziesii var
- Effects of planting spacing and site quality on 25-year growth and mortality relationships of Douglas-fir (Pseudotsuga menziesii var menziesii).
XML: View XML