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Seasonal Water Movement in Tree Stems

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Water movement in boles of 60-year-old lodgepole pine (Pinus contorta Dougl.) and red fir (Abies magnifica A. Murr.) in the Sierra Nevada of California was estimated by monitoring the ascent of 32P injected into small roots. Daytime rates of ascent for both species ranged from 12 to 84 cm/hr in summer. No movement occurred in lodgepole pine during winter. Winter rates for red fir averaged 0.4 to 1.4 cm/hr. In October, volume of daytime water movement was estimated to range from 1.3 to 5.3 l/hr in boles of individual trees. The technique may be used to estimate transpiration from a forest area. Expanding the volume of water transport to a hypothetical hectare of forest gave a transpiration rate of 0.16 cm/day in October. Forest Sci. 18:266-272.
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Keywords: Abies magnifica; Pinus contorta; autoradiography; radioisotopes; transpiration

Document Type: Journal Article

Affiliations: Research Foresters, Pacific Southwest Forest and Range Exp. Stn., USDA Forest Service, Berkeley, Calif.

Publication date: 1972-12-01

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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