A Self-Contained Freezing Chamber for Tree Ecophysiological Studies in the Field
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.
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Document Type: Journal Article
Affiliations: Professor, Department of Forest Science, University of Alberta, Edmonton, Alberta T6G 2H1
Publication date: 1991-08-01
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