Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (670 KB bytes)

Title: Is long primary growth associated with stem sinuosity in Douglas-fir?

Author: Gartner, Barbara L.; Johnson, G.R.;

Date: 2006

Source: Canadian Journal of Forest Research. 36: 2351-2356

Publication Series: Scientific Journal (JRNL)

Description: Stem sinuosity is a highly visible stem-form trait in the leaders of fast-growing Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) trees, yet its cause is unknown. We tested the hypotheses that sinuous stems have longer expanses of primary growth than nonsinuous stems (putting the leader at higher risk for curvature, induction of compression wood formation. and possibly overcorrection) and higher leader angle using 4- to 5-year-old saplings in raised beds. As hypothesized, sinuous stems had longer expanses of primary growth than did nonsinuous stems (13.5 vs. 12.3 cm, respectively). However, for the dates fox which growth length/day, primary growth, secondary growth, and total growth) differed significantly among sinuosity class. sinuosity class only explained 15%-21% of the variation in growth rate. There were no significant differences in leader angle for saplings of the three sinuosity classes. Contingency tables indicated some consistency in the category of sinuosity to which we assigned the stems in 2001 and 2002 (χ2 = 11.2, p < 0.004). When we used a more quantitative measure, the ratio of stem length/stem distance there was a tendency toward a significant relationship between the two years (r = 0.272, p = 0.0893). These data suggest that. counter to expectation, the rate of stem growth was not a large factor in determining whether leaders become sinuous for this population of trees.

Publication Notes:

  • 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.



Gartner, Barbara L.; Johnson, G.R. 2006. Is long primary growth associated with stem sinuosity in Douglas-fir?. Canadian Journal of Forest Research. 36: 2351-2356


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.