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Notes: Foliage, Stem, and Root Interrelations in Young Loblolly Pine

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Leaf area has been proposed as a sensitive indicator of competition in loblolly pine, but it is difficult to measure in the field. Stem diameter is easier to measure and has been demonstrated to be more sensitive to competition than height growth. The objective of the study was to determine the interrelations of total needle surface area, specific leaf area, stem cross-sectional area, and root volume in young loblolly pine seedlings. Stem cross-sectional area was found to be linearly related to both total needle surface area (R² = 0.96) and root volume (R² = 0.95). These strong relationships suggest the presence of a closely regulated, physiological feedback system in seedlings of loblolly pine. Thus, stem cross-sectional area would be a good predictor of competition-induced leaf area changes. Specific leaf area was significantly affected by seedling and needle age with a range from 260 cm²/g in 1-year-old seedlings to 150 cm²/g in 4- and 5-year-old seedlings. Present year needles had consistently higher specific leaf areas. Changes in leaf specific gravity appeared to be the cause of the specific leaf area changes. Forest Sci. 31:891-898.

Keywords: Pinus taeda; leaf area; leaf specific gravity; root volume; specific leaf area; stem cross-sectional area

Document Type: Miscellaneous

Affiliations: Honors Research Student, Department of Forestry, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

Publication date: December 1, 1985

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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