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

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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.

Keywords: Abies grandis; P. contorta; Picea engelmannii; Pinus ponderosa; Pseudotsuga menziesii; soil moisture

Document Type: Journal Article

Affiliations: Plant Physiologist, Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Wenatchee, Washington

Publication date: June 1, 1974

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.
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