Transpiration of Conifer Seedlings in Relation to Soil Water Potential
Authors: Lopushinsky, W.; Klock, G. O.
Source: Forest Science, Volume 20, Number 2, 1 June 1974 , pp. 181-186(6)
Publisher: Society of American Foresters
Abstract:Measurement of the transpiration response of ponderosa pine, lodgepole pine, Douglas-fir, grand fir, and Engelmann spruce seedlings to decreasing soil water potential showed that the transpiration rate of all species began to decline at a soil water potential of -1 to -2 bars, and that the degree of reduction of transpiration rate differed with species. At a soil water potential of -10 bars, the transpiration rate of the pines was only about 12 percent of their maximum rate, while the rate of the firs was 27-37 percent of maximum. The response of the spruce was intermediate. Forest Sci. 20:181-186.
Document Type: Journal Article
Affiliations: Plant Physiologist, Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Wenatchee, Washington
Publication date: June 1, 1974
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