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The Effects of Full-Tree and Tree-Length Harvests on Natural Regeneration

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Abstract:

Changes in density and stocking of natural regeneration were analyzed for paired full-tree (delimbed off-site) and tree-length (delimbed on-site) clearcuts applied side by side in three mixed stands. No special effort was made to preserve advance regeneration. Three-stand means indicated larger advance softwood regeneration losses on the tree-length sites during harvests, suggesting greater direct mechanical damage, but larger softwood losses occurred on the full-tree sites during the first summer after harvests, suggesting a more stressful postharvest environment. After 1 yr, losses of advance spruce and fir did not differ significantly between treatments within stands. Recruitment of intolerant and intermediate hardwoods was greater after the full-tree harvests, probably because of higher levels of solar radiation. Results indicate (a) significantly greater densities of intolerant and intermediate hardwoods after full-tree harvests of mixed stands, and (b) that with care taken to preserve advance growth during harvests, advance softwood survival is better when slash is left on cutovers. North. J. Appl. For. 11(4): 131-137.

Document Type: Journal Article

Affiliations: Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, N.B. Canada E3B 6C2

Publication date: December 1, 1994

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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