Publications du Service canadien des forêts

La croissance de l'épinette blanche (Picea glauca (Moench) Voss) dans les plantations de l'Hydro-Québec à Drummondville, Québec. 1970. Truong, DinhPhu s.n., S.l. Rapport d'information Q-F-X-11. 21 p.

Année : 1970

Disponible au : Centre de foresterie des Laurentides

Numéro de catalogue : 16143

La langue : Français

Séries : Rapport d'information (CFL - Québec)

Disponibilité : PDF (télécharger)

Sélectionner

Résumé

Based on the yearly height increment, white spruce plantations are divided in three site classes. The good sites are on fertile soils of fluviatile deposits, tills and related materials. In these sites, white spruce stands have a height increment of 15 to 18 inches per year after planting, a site index of 65 to 77 and a potential yield of 35 to 40 cords per acre, 40 years after planting. The medium sites are found on soils of average fertility level of fluvio-glacial deposits and sandy tills or on fertile soils of fluvial deposits and tills where heavy competition of vegetation or invasion of volunteers occur. White spruce stands in these sites have a height increment of 12 to 14 inches per year after planting, a site index of 50 to 65 and a potential yield of 25 to 30 cords per acre, 40 years after planting. The poor sites are located on poor soils of outwash sands and marine sands. White spruce stands on these soils have an average height increment of 8 to 12 inches per year after planting, a site index of 38 to 50 and a potential yield of 15 to 20 cords per acre 40 years after planting. The growth and yield of white spruce stands vary therefore with the quality of sites and in some cases with the intensity of vegetation competition.