{"id":82439,"date":"2019-01-30T12:16:54","date_gmt":"2019-01-30T17:16:54","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/large-spruce-seedling-responses\/"},"modified":"2019-01-30T12:16:54","modified_gmt":"2019-01-30T17:16:54","slug":"large-spruce-seedling-responses","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/large-spruce-seedling-responses\/","title":{"rendered":"Large spruce seedling responses to the interacting effects of vegetation zone, competing vegetation dominance and year of mechanical release"},"content":{"rendered":"\n

Published in Forestry 87: 153-164. https:\/\/doi.org\/10.1093\/forestry\/cpt048<\/a><\/b><\/p>\n

It is necessary to evaluate how large seedling stock, used as an alternative to chemical herbicide for vegetation management, interacts with the timing of mechanical release (MR) and if use of such stock offers a broader window of intervention for release than conventional stock. Such a context is present in Quebec (Canada), where chemical herbicides were banned from use on public lands in 2001.We thus evaluated the impact of delaying MR on the performance of large spruce seedlings established in a gradient of vegetation zones and competition environments. Fourteen experiments were conducted in Picea glauca<\/em> or P. mariana<\/em> plantations in the temperate hardwood (TH), temperate mixedwood or boreal mixedwood vegetation zones. On each site, we established a completely randomized block design with 5\u20138 replicates, each divided into four plots: (1) control; (2) MR applied the year during which light availability to the planted seedlings averaged 60 per cent of full sunlight (EARLY); (3) MR at EARLY + 1 year (LATE1); and (4) MR at EARLY + 2 years (LATE2). Vegetation data collected in controls 8 years after MR was submitted to a correspondence analysis to group the sites according to their competing species dominance. Seedling responses to the timing of MR, 5\u20138 years after treatment, varied across competing vegetation dominance, vegetation zone or a combination of both.On sites where intolerant hardwoods were dominant, postponing MR 1 year after light availability had reached 60 per cent of full sunlight had a positive effect on seedling dimensions, especially in the TH zone. However, the LATE2 treatment resulted in significant stem volume losses on these sites. Whereas treatment effects were limited on ericaceous dominated sites, MR promoted seedling growth on sites dominated by shrub\/herbaceous species, with no difference between EARLY, LATE1 and LATE2.<\/p>\n","protected":false},"excerpt":{"rendered":"

Published in Forestry 87: 153-164. https:\/\/doi.org\/10.1093\/forestry\/cpt048 It is necessary to evaluate how large seedling stock, used as an alternative to chemical herbicide for vegetation management, interacts with the timing of mechanical release (MR) and if use of such stock offers a broader window of intervention for release than conventional stock. Such a context is present […]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1180,1181,1182],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1090],"class_list":["post-82439","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forestry-research","cptt_theme-forests","cptt_theme-silviculture","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-hebert-francois-en"],"acf":[],"yoast_head":"\nLarge spruce seedling responses to the interacting effects of vegetation zone, competing vegetation dominance and year of mechanical release - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Large spruce seedling responses to the interacting effects of vegetation zone, competing vegetation dominance and year of mechanical release.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/large-spruce-seedling-responses\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Large spruce seedling responses to the interacting effects of vegetation zone, competing vegetation dominance and year of mechanical release - 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