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A Self-Contained Freezing Chamber for Tree Ecophysiological Studies in the Field

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A self-contained freezing chamber was constructed for use in tree ecophysiological studies in the field. The chamber has two layers, an outer layer of polystyrene board to provide both physical support and insulation, and an inner chamber of plastic to protect the twig and foliage from mechanical damage from the packs of freezing medium. The freezing medium is a NaCl:ice mixture which can provide chamber temperatures as low as -20.3°C. The mean temperature at seven locations within the chamber was -4.1°C with a standard deviation of ±0.3°C when a NaCl:ice mixture of 16(gm):1.65(l) was used. In field trials, it took two people about 3 minutes to set up the apparatus on a twig. The technique was found to be both practical and economical for field freezing experiments, especially in handling large sample sizes. For. Sci. 37(3):924-930.

Keywords: Frosts; freezing damage; low temperature stress

Document Type: Journal Article

Affiliations: Professor, Department of Forest Science, University of Alberta, Edmonton, Alberta T6G 2H1

Publication date: August 1, 1991

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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