Birch ( Betula papyrifera ) × white spruce ( Picea glauca ) interactions in mixedwood stands: implications for management

Published Date
Journal of Forest Science, 2013, Vol.59 , pp.137-149

Abstract

Current British Columbia forest regulations drive the regeneration management towards pure conifer stands rather than remaining in a mixed-species condition. This approach may result in unnecessary vegetation control. The main objective of this investigation was to study the impact of variable paper birch densities on white spruce growth in 15–20 years old stands for management implications. Regression analysis was used to examine the effect of birch density and two competition indices to predict spruce growth. A mixed model ANOVA showed that spruce mean annual DBH and basal area increment differed significantly among sites and density. From the regression analysis it appears that birch density up to 4,000 stems·ha^–1 had no significant influence on spruce growth which is...

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