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Temperature Affects Growth and Development of Engelmann Spruce

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Seedlings of Engelmann spruce (Picea engelmannii Parry)--a high-altitude, cold-climate species--were grown under 30 combinations of day and night temperatures. Growth responses were determined in terms of height, diameter, dry weight of tops and roots, terminal bud development, and number of lateral branches. Night temperature was the most important factor in increasing all aspects of growth except terminal bud formation, which was controlled more by day temperatures. Increasing night temperature within the range of 3 to 23°C increased growth even when the night temperature exceeded day temperatures. Day temperatures of both 19 and 23° with a 23° night temperature produced significantly better growth than any of the other 28 combinations of temperatures. The 35° day temperature tended to inhibit terminal bud formation. This temperature also caused the highest mortality--especially in combination with a 3° or 7° night temperature. These responses are compared to those of redwood (Sequoia sempervirens (D. Don) Endl.) obtained in previous studies. Forest Sci. 16:447-452.

Keywords: Picea engelmannii; bud formation; survival

Document Type: Journal Article

Affiliations: Rocky Mountain Forest and Range Exp. Sta., USDA Forest Serv., Fort Collins, Colo. 80521

Publication date: 1970-12-01

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.

    2015 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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