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Twenty-four Years of Ponderosa Pine Growth in Relation to Canopy Leaf Area and Understory Competition

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With data from a long-term experiment in which initial stocking of trees and understory vegetation were controlled, we tested the hypothesis that stand growth is directly correlated with the development of the forest canopy; e.g., growth is proportional to canopy leaf area. The hypothesis was generally supported. Stands of ponderosa pine without understory vegetation more rapidly developed canopy leaf area than stands with an understory. At very low leaf area indices, wood production per unit of leaf area was more efficient, particularly in stands where the understory vegetation had been removed. Once the leaf area index exceeded 2.0, however, the efficiency of wood production remained stable and was comparable for stands with and without understory vegetation. For. Sci. 33(2):538-547.

Keywords: Pinus ponderosa; sapwood area; water use

Document Type: Journal Article

Affiliations: Research Forester, Bend Forest Sciences Laboratory, USDA Forest Service, Bend, OR 97701

Publication date: 1987-06-01

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 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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