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Heat-Pulse Velocity and Bordered Pit Condition in Living Engelmann Spruce and Lodgepole Pine Trees

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The purpose of this study was to correlate sap movement and ultrastructure of wood. Heat-pulse velocity measurements indicated a low flow in the vicinity of the cambium, a peak flow in the region from 30 to 42 mm from the cambium, and a tailing off of flow as the distance from the cambium increased. Bordered pits located in the area of peak sap movement were not aspirated and were only partially incrusted. Pits located in the area of low flow near the cambium were immature and nearly imperforate, whereas those in the area of low flow deep within the trees showed a high frequency of aspiration or nearly complete incrustation. Forest Sci. 19:291-296.
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Keywords: Bordered-pit membrane; carbon replica

Document Type: Journal Article

Affiliations: Associate Professor, Department of Forest and Wood Sciences, Colorado State University

Publication date: 1973-12-01

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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