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RMRS-RP-73: Response of Douglas-fir advance regeneration to overstory removal

Maranto, J. Chris; Ferguson, Dennis E.; Adams, David L. 2008. Response of Douglas-fir advance regeneration to overstory removal. Research Paper RMRS-RP-73. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 17 p.

A statistical model is presented that predicts periodic height growth for released Pseudotsuga menziesii var. glauca [Beissn.] Franco advance regeneration in central Idaho. Individual tree and site variables were used to construct a model that predicts 5-year height growth for years 6 through 10 after release. Habitat type and height growth prior to release were the most important predictors of post-release height growth. Douglas-fir and subalpine fir habitat types had longer adjustment periods compared to grand fir habitat types, and damaged trees did not recover to growth rates as expressed in undamaged trees. Morphological differences between sun- and shade-developed foliage are also important aspects to successful release. Recommendations for releasing Douglas-fir advance regeneration are presented.

Keywords: Pseudotsuga menziesii, advance regeneration, release, suppression

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Title: RMRS-RP-73: Response of Douglas-fir advance regeneration to overstory removal
Electronic Publish Date: September 30, 2008
Expires: Indefinite
Last Update:
September 30, 2008

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