The Mountain Alternative Silvicultural Systems (MASS) study is a multi-disciplinary, multi-agency project initiated both for silvicultural and social reasons. MacMillan Bloedel Limited, the Canadian Forest Service, and FERIC cooperated in the study, with participation by the University of Victoria and the University of British Columbia. Three alternative treatments representing a range of canopy removal levels - uniform shelterwood, green tree retention, and patch cutting - were implemented in the research area, located on the east coast of Vancouver Island. FERIC monitored the productivity and cost of the falling and forwarding operations, and measured site disturbance and coarse woody debris for each harvesting treatment. The results of FERIC's study are presented.
The 1-2-3 shelterwood cut system developed by FPInnovations–Feric Division is increasingly being used as part of new ecosystem management approaches in eastern Canada. Feric evaluated the direct harvesting costs for the first entry phase in a shelterwood system implemented using the 1-2-3 method, which is also called shelterwood cutting with close selection. We compared the results of the partial cutting operation with those of harvesting with the protection of regeneration and soils (HPRS). The harvesting costs in the shelterwood approach can be up to $1.87/m³ more than in the HPRS treatment. However, the increased mean stem volume that is harvested as a result of the stem selection guidelines can mitigate this adverse impact in stands with large trees.
Partial cuts include different types of intervention in the types of intervention in the forest; whether it be regular or irregular regular or irregular progressive cuts, commercial thinning or selection cuts, they all have the they all have in common the partial removal of the partial removal of the forest cover. By a certain number of standing trees, these cuts are these cuts are practiced, among others for reasons of natural seeding, release of future trees of future trees, wildlife management or protection of wildlife management or protection of sensitive landscapes. In this sense, they contribute to the harmonization of of social, environmental and economic values in a given economic values on a given territory. In front of the trend towards increasing the areas treated with treated with this type of cutting, questions of efficiency, productivity questions of efficiency, productivity and profitability of and profitability of the operations remain. In this regard, can research and development help practitioners?
Les coupes partielles regroupent différents types d’intervention en forêt; qu’il s’agisse de coupes progressives régulières ou irrégulières, d’éclaircies commerciales ou de coupes de jardinage, elles ont toutes en commun le prélèvement partiel du couvert forestier. En conservant un certain nombre d’arbres sur pied, ces coupes sont pratiquées, entre autres, pour des raisons d’ensemencement naturel, de dégagement d’arbres d’avenir, d’aménagement faunique ou de protection de paysages sensibles. Elles participent en ce sens à l’harmonisation de valeurs sociales, environnementales et économiques sur un territoire donné. Devant la tendance à l’augmentation des superficies traitées avec ce type de coupes, des questions d’efficacité, de productivité et de rentabilité des opérations demeurent. À ce titre, la recherche et le développement peuvent-ils venir en aide aux praticiens ?
When implementing ecosystem-based forest management, shelterwood harvesting is often considered as a solution to allow timber harvesting while while maintaining the ecological attributes of mature and overmature forests. However, their impact on wood production and stand regeneration in the boreal forest is still poorly understood. This is the reason for the establishment of a research program of 36 experimental units in 2003-2004 in the northern Saguenay and Lower North Shore.
Lors de la mise en œuvre de l’aménagement forestier écosystémique, les coupes progressives sont souvent considérées comme une solution pour permettre une récolte de bois tout en conservant les attributs écologiques des forêts mûres et surannées. Cependant, leur impact sur la production ligneuse et la régénération des peuplements en forêt boréale est encore mal connu. C’est ce qui a motivé la mise en place d’un dispositif de recherche de 36 unités expérimentales en 2003-2004 au nord du Saguenay et en Basse-Côte-Nord.
The Date Creek Silvicultural Systems Study compared clearcut, heavy removal, and light removal silvicultural systems in 135-year-old hemlock/cedar stands in northwestern British Columbia. FERIC monitored productivities and costs of mechanized, conventional, and horse skidding harvesting systems on six study blocks (two clearcuts, three heavy removals, and one light removal). FERIC's objectives were to assess planning and harvesting productivities and costs: assess soil disturbance levels; and identify ways to improve operational planning and implementation of partial cutting silvicultural systems in Interior Cedar-Hemlock ecosystems.
The Forest Engineering Research Institute of Canada (FERIC) performed a study on three partial cutting operations in interior British Columbia, specifically small patch, patch, and shelterwood harvesting. The study provided information about the harvesting operations' productivities and costs. Results of the residual damage survey are presented. Suggestions for implementation during future partial cutting operations are given.
From 1997-1998, the Forest Engineering Research Institute of Canada (FERIC) conducted a partial cutting study in an immature hemlock stand in coastal British Columbia. The two partial cutting options used were commercial thinning and shelterwood harvesting. The results are presented in this report and include information on productvity and costs of the cable and ground-based harvesting systems used, effectiveness of falling and yarding techniques for the treatments, and information on post-harvest disturbance, wind damage, and residual tree wounding.