Bedard S.,Ministeere des Ressources naturelles |
Guillemette F.,Ministeere des Ressources naturelles |
Raymond P.,Ministeere des Ressources naturelles |
Tremblay S.,Ministeere des Ressources naturelles |
And 2 more authors.
Journal of Forestry | Year: 2014
We evaluated silvicultural scenarios for the rehabilitation of impoverished northern hardwood stands in Québec (Canada). The experiment comprises five treatments: a control, a hybrid single-tree and group selection (SC), two continuous cover irregular shelterwoods (CCIS) with respective residual basal areas (BAs) of 16 m2 ·ha-1 and 14 m2 ·ha-1, and an extended irregular shelterwood (EIS) with a residual BA of 14 m2 ·ha-1. American beech (Fagus grandifolia Ehrh) advance regeneration was removed with brush saws and the soil was mechanically scarified in all cutting treatments. Postcut values showed significant improvements of acceptable growing stock and a significant reduction of American beech; both effects were proportional to the intensity of removal. Simulated outcomes of the four scenarios were compared over a 120-year period. Results show that the EIS scenario should require a longer period to restore the desired uneven-aged stand structure; also, its harvests removed less BA of large-diameter trees than the SC scenario. © 2014 Society of American Foresters. Source