{"id":82032,"date":"2019-01-30T12:12:43","date_gmt":"2019-01-30T17:12:43","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/black-spruce-kalmia-vaccinium-microsite-interactions-field\/"},"modified":"2019-01-30T12:12:43","modified_gmt":"2019-01-30T17:12:43","slug":"black-spruce-kalmia-vaccinium-microsite-interactions-field","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/black-spruce-kalmia-vaccinium-microsite-interactions-field\/","title":{"rendered":"Black spruce seedlings in a Kalmia-Vaccinium association: microsite manipulation to explore interactions in the field"},"content":{"rendered":"\n<p>Published in<b>&nbsp;Canadian Journal of Forest Research 34: 1657-1668<\/b><\/p>\n<p>We established a field trial on an ericaceous-dominated clearcut in Qu\u00e9bec to determine the effect of <em>Kalmia angustifolia<\/em> L., <em>Vaccinium angustifolium<\/em> (Ait.), and <em>V. myrtilloides<\/em> (Michx.) on the growth and physiology of black spruce (<em>Picea mariana<\/em> (Mill.) BSP) seedlings and on soil characteristics over the first two growing seasons. Plots undergoing one of three treatments (shrub removal, humus removal, or undisturbed control) were planted with black spruce seedlings that were either unfertilized or spot fertilized at time of planting. ln some of the undisturbed control plots, we also used <sup>15<\/sup>NH<sub>4<\/sub><sup>15<\/sup>NO<sub>3<\/sub> to compare uptake of broadcast N fertilizer by vegetation. The ericaceous shrubs had a significant negative impact on seedling growth. Growth reductions were not related to water stress, soil temperature, or soil moisture. Extractable NH<sub>4<\/sub>-N and P concentrations in mineral soil tended to decrease in the presence of ericaceous shrubs, but effects were not significant. Seedling foliar N concentration was also reduced in the presence of ericaceous shrubs. Of the total amount of <sup>15<\/sup>N fertilizer found in vegetation, 64% was immobilized in <em>Vaccinium <\/em>spp., 31% in <em>Kalmia<\/em>, and 5% in black spruce, but spruce took up more <sup>15<\/sup>N per unit of root biomass than the ericaceous shrubs. <em>Kalmia <\/em>had consistently higher predawn xylem water potentials than black spruce.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in&nbsp;Canadian Journal of Forest Research 34: 1657-1668 We established a field trial on an ericaceous-dominated clearcut in Qu\u00e9bec to determine the effect of Kalmia angustifolia L., Vaccinium angustifolium (Ait.), and V. myrtilloides (Michx.) on the growth and physiology of black spruce (Picea mariana (Mill.) BSP) seedlings and on soil characteristics over the first two [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1180,1181,1182],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[],"class_list":["post-82032","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"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Black spruce seedlings in a Kalmia-Vaccinium association: microsite manipulation to explore interactions in the field - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Plots undergoing one of three treatments were planted with black spruce seedlings that were either unfertilized or spot fertilized at time of planting.\" \/>\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\/black-spruce-kalmia-vaccinium-microsite-interactions-field\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Black spruce seedlings in a Kalmia-Vaccinium association: microsite manipulation to explore interactions in the field - 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