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Notes: Allelopathic Potential of Coniferous Species to Old-Field Weeds in Eastern Quebec

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Phytotoxicity of Abies balsamea (L.) Mill., Picea mariana (Mill.) BSP., Pinus resinosa Ait., Pinus divaricata (Ait.) Dumont, and Thuya occidentalis L. fresh leaf and leaf litter leachates were evaluated on the germination and growth of four weed species: Phleum pratense L., Poa pratensis L., Agropyron repens (L.) Beauv., and Epilobium angustifolium L. Three dilutions of leachates were used for the germination tests. Germination of all weed species was inhibited in proportion to the dilutions used. Fresh leaf leachates of A. balsamea and P. resinosa were most inhibitory to germination. P. pratense was usually less affected by the treatments than were the other three species. Germination or E. angustifolium and P. pratensis was delayed by the different solutions; germination of P. pratense was delayed only by fresh leaf leachates of A. balsamea and P. divaricata. Height growth and root elongation of A. repens, P. pratensis and P. pratense were inhibited by most extracts. P. mariana leaf leachates were the most inhibitory to height growth and root elongation. All seedlings treated with P. mariana leaf leachates exhibited severe root necroses which affected normal root development. Laboratory experiments suggested that allelopathic weed control, using coniferous leaf litter or fresh leaves, could aid in reforestation of abandoned fields by reducing undesirable competition. Forest Sci. 32:112-118.
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Keywords: Abies balsamea; Picea mariana; Pinus divaricata; Pinus resinosa; Thuya occidentalis; competition; germination; growth

Document Type: Miscellaneous

Affiliations: Faculty of Forestry, Laval University, Qu├ębec G1K 7P4, Canada

Publication date: 1986-03-01

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    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
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