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


    Twenty-two forages from Admiralty Island, southeastern Alaska, were monitored bimonthly for one year to assess seasonal changes in their chemical composition: neutral detergent fiber, acid detergent fiber, cellulose, lignin/cutin, invitro dry-matter digestibility, total nitrogen, phosphorus, potassium, calcium, magnesium, sodium, copper, manganese, iron, and zinc. Seasonal fluctuations were pronounced but generally paralleled the pulse of plant growth in spring-summer. Only minor differences were found in chemical composition of forages from two study areas and results of this study did not differ greatly from results of other studies in southeastern Alaska and the Pacific Northwest. Forbs, half-shrubs, and shrub leaves were consistently the most nutritious forages, especially during winter. Seasonally low levels of digestible energy, nitrogen, and phosphorus were identified as the most important potential limitations of these forages in meeting the nutritional needs of herbivores.

    Publication Notes

    • You may send email to 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.


    Hanley, Thomas A.; McKendrick, Jay D. 1983. Seasonal changes in chemical composition and nutritive value of native forages in a spruce-hemlock forest, southeastern Alaska. Res. Pap. PNW-RP-312. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 48 p


    Google Scholar


    Forage production, nutrient analysis, native plants, phytochemistry, phenology, seasonal variations, Alaska (southeastern), southeastern Alaska, wildlife habitat

    Related Search

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