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Development of Weight Variation in Douglas-Fir Seedlings

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Abstract:

Coefficients of variation (CV) for weight of seedlings of Douglas-fir in nursery beds increased with age and mean weight of seedlings. The relationship between log10 dry weight and coefficient of variation for weight was linear from seed through 2 + 0 seedling stages. Infection by the fungus Fusarium oxysporum and the nematodes Pratylenchus penetrans and Paratylenchus projectus in unfumigated soil did not noticeably affect this relationship. Variation in relative growth rate was inferred from changes in stem diameters during the second growing season. Such variation would cause a positive correlation between log dry weight and CV. It could be reduced only by treatments that suppress growth or reduce growing time. Forest Sci. 19:105-108.

Keywords: Fusarium oxysporum; Pseudotsuga menziesii; nematodes; relative growth rate

Document Type: Journal Article

Affiliations: Associate Professor, Department of Plant Pathology, Cornell University, Ithaca, New York 14850

Publication date: June 1, 1973

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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