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Budbreak for Twenty-Three Upland Hardwoods Compared Under Forest Canopies and in Recent Clearcuts

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Patterns of budbreak and leaf development were monitored on 23 upland hardwoods on the Cumberland Plateau of middle Tennessee. These patterns varied by species, topographical location, and the presence or absence of a forest canopy. Most species began budbreak earlier in coves on the Plateau escarpment than on the Plateau top. Most tolerant species began budbreak earlier under forest canopies than in open clearcuts. Six species of Quercus consistently had budbreak and leaf appearance earlier under canopies than in clearcuts. Apparently, the propensity of some species to initiate growth early under a canopy increases their shade tolerance by allowing some leaf development before crown closure. These patterns are not necessarily beneficial once the canopy is removed. Time requirements for completion of the budbreak process varied substantially within species. Individual Cornus florida, Quercus alba, and Carya sp. began and completed budbreak within 2 days. Other individuals of the same species and size required up to 25 days to complete budbreak. Forest Sci. 32:924-935.
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Keywords: Phenology; oak-regeneration; succession; tolerance

Document Type: Journal Article

Affiliations: Principal Silviculturist, USDA Forest Service, Silviculture Laboratory, Sewanee, TN, Maintained by the Southern Forest Experiment Station, in Cooperation with the University of the South

Publication date: 1986-12-01

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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