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Automatic Determination of Conductance, Transpiration, and Environmental Conditions in Forest Trees

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An automatic system was developed to determine water vapor conductance, transpiration, and environmental conditions for forest trees. A series of eight gas exchange cuvettes are mounted on platforms and connected to a computer in a nearby laboratory. The computer controls the acquisition of appropriate relative humidity, temperature, and light data and provides real-time analysis of needle or leaf conductance, transpirational flux density, and environmental conditions. Data were collected at hourly intervals throughout an entire season of water use. Missing data, resulting primarily from effects of nearby lightning strikes, was limited to 2.7 percent of a possible 35,288 measurements. Forest Sci. 27:817-827.
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Keywords: Water vapor conductance

Document Type: Journal Article

Affiliations: Principal Plant Physiologist, Multiresource Management of Montane and Subalpine Zones, Central Rocky Mountains, USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO 80526

Publication date: 1981-12-01

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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