L'éclaircie commerciale des peuplements d'épinette noire : qualité et valeur des sciages

Authors: Bernier, Mikaël
Advisor: Achim, AlexisPothier, David
Abstract: The main purpose of this study is to improve the knowledge related to commercial thinning (CT), its application and its effects on the quality and economic value of processed products. A network of plots that aimed to monitor the long-term effects of CT was measured. Black spruce logs were harvested from treated stands (conducted 10-13 years before) and control stands and then processed in lumber. Bending stiffness tests were performed to measure the moduli of elasticity (MOE) and rupture (MOR). The quality and financial datas were submitted to different statistical analysis: ANOVA, linear regression or logistic regression. The results show that commercial thinning had a positive effect on the diameter growth of residual trees (P = 0.001) and the total value of lumber products (P = 0.001). The treatment also increased the quantity (P = 0.011) and size (P = 0.031) of knots, although no significant effects were detected on MOE and MOR (P > 0.05). Tree volume and their value increased with DBH in populations that had been subjected to a commercial thinning. These results suggest that commercial thinning may be included in forest management strategies that aim to increase the value of standing trees.
Document Type: Mémoire de maîtrise
Issue Date: 2016
Open Access Date: 23 April 2018
Permalink: http://hdl.handle.net/20.500.11794/26594
Grantor: Université Laval
Collection:Thèses et mémoires

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