Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Kenneth W. Krueger; James M. Trappe
    Date: 1967
    Source: Forest Science. 13(2): 192-202.
    Publication Series: Scientific Journal (JRNL)
    PDF: Download Publication  (604 KB)


    Seasonal growth of tops and roots and concomitant trends in food reserves were observed biweekly on Peudotsuga menzisii (Mirb.) Franco seedlings of two seed sources growing in a Pacific Northwest forest nursery. A general pattern of alternating root, diameter, and shoot growth was found. Rapid root growth did not coincide with rapid shoot elongation, but preceded and followed it. Increased root activity was strongly correlated with lowered reducing sugar concentrations in seedling roots of the faster growing source. Sucrose and raft]nose increased markedly during early winter and were apparently converted to starch in spring prior to growth. Concentrations of reducing sugars, crude fat, and protein nitrogen changed little with season. Implications of this information on timing of lifting, storage, and transplanting of seedlings are discussed.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
    • 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.


    Krueger, Kenneth W.; Trappe, James M. 1967. Food reserves and seasonal growth of Douglas-fir seedlings. Forest Science. 13(2): 192-202.

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page