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The Allelopathic Influence of Broadleaf Trees and Shrubs on Seedlings of Douglas-fir

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The allelopathic potential of leaf litter from five species of broadleaf trees and shrubs found in southwestern Oregon on the germination and early growth of Pseudotsuga menziesii was examined. While each of these species showed significant allelopathic potential when tested in a highly artificial system against seeds of cucumber, the observed reductions in growth when tested against P. menziesii ranged from about 44 percent of control growth for Umbellularia californica to about 98 percent of control for Arbutus menziesii. No consistent expression of allelopathy was observed when bioassays, using field soil, were the basis of experimentation. The data show that allelopathy is of potential importance among the many ecological factors which operate under field conditions. Forest Sci. 31:945-952.
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Keywords: Arbutus menziesii; Arctostaphylos patula; Castanopsis chrysophylla; Ceanothus velutinus; Pseudotsuga menziesii; Umbellularia californica

Document Type: Journal Article

Affiliations: Environmental Sciences and Resources/Biology, Portland State University, Portland, OR 97207

Publication date: 1985-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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