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Mycorrhizal Deficiency in a Donglas-Fir Region Nursery

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Severely stunted, phosphorus-deficient Douglas-fir seedlings grown in a newly developed western Oregon nursery failed to respond to fertilization during their second growing season. The seedlings proved to be nonmycorrhizal; ectomycorrhizal fungi were apparently sparse in the soil due to the previous long period of agricultural use of the tract combined with the land leveling and soil fumigation during development of the nursery. Inoculation of affected beds with mycorrhizal fungi in soil from a nearby bed of ectomycorrhizal transplant seedlings significantly increased phosphorus uptake and growth of seedlings during the third growing season. Seedling growth was further enhanced by combining inoculation with fertilization. By the end of the third growing season, most surviving seedlings on uninoculated plots had begun to form mycorrhizae from natural sources of infection.

Keywords: Pseudotsuga menziesii; phosphorus nutrition; soil fumigation

Document Type: Journal Article

Affiliations: Supervisor, Forestry Research, Crown Zellerbach Corp., Central Research Division, Camas, Wash.

Publication date: December 1, 1969

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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