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Notes: Douglas-fir Stem Growth per Unit of Leaf Area Increased by Interplanted Sitka Alder and Red Alder

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Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] stem growth per unit of leaf area was compared in the presence and absence of Sitka alder (Alnus sinuata) and red alder (Alnus rubra). The apparent effect of the alders differed with the method used to calculate the ratio. When Douglas-fir's rating was calculated from conversion ratios for sapwood area to leaf area as measured at each site, it was increased 40 percent by the presence of Sitka alder and 250 percent by red alder. This increased stem growth per unit of leaf area probably resulted from both greater net photosynthetic rates and a shift in within-tree photosynthate allocation. Forest Sci. 30:259-263.
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Keywords: Pseudotsuga menziesii; leaf area; net primary production; photosynthesis allocation

Document Type: Miscellaneous

Affiliations: Graduate Research Assistant, School of Forestry and Environmental Studies, Duke University, Durham, NC 27706

Publication date: 1984-03-01

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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