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): Keith F. Jensen
    Date: 1981
    Source: Res. Pap. NE-470. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
    Publication Series: Research Paper (RP)
    Station: Northeastern Research Station
    PDF: View PDF  (528.31 KB)

    Description

    One-year-old seedlings of yellow-poplar (Liriodendron tulipifera L.), eastern cottonwood (Populus deltoides Bartr.), and white ash (Fraxinus americana L.) were divided into four groups. One group served as the control, and the other groups were fumigated for 12 hours per day with either 0.1 ppm O3, 0.2 ppm SO2, or 0.1 ppm O3 plus 0.2 ppm SO2. Two or three seedlings of each species were harvested twice a week for 6 weeks, and leaf area and new growth weight were determined. Data on leaf area and new growth weight were transformed to natural logarithms and fitted with a linear regression model. Relative growth rate was positive in all species-treatment combinations, but varied with fumigation treatment. Net assimilation rate was suppressed in cottonwood seedlings in all fumigation treatments, and in yellow-poplar seedlings in the SO2 and O3 fumigations. Relative leaf area growth rate of the cottonwood and yellow-poplar seedlings was reduced by all three fumigation treatments. White ash growth was not analyzed because statistically significant differences were not found.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.
    • 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.

    Citation

    Jensen, Keith F. 1981. Air pollutants affect the relative growth rate of hardwood seedlings. Res. Pap. NE-470. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/15018