{"id":82114,"date":"2019-01-30T12:14:55","date_gmt":"2019-01-30T17:14:55","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/controlling-kalmia\/"},"modified":"2019-01-30T12:14:55","modified_gmt":"2019-01-30T17:14:55","slug":"controlling-kalmia","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/controlling-kalmia\/","title":{"rendered":"Controlling Kalmia and reestablishing conifer dominance enhances soil fertility indicators in central Newfoundland, Canada"},"content":{"rendered":"\n<p>Published in <strong>Canadian Journal of Forest Research 39: 1270-1279<\/strong><\/p>\n<p>Growth rates of young conifers can be poor on disturbed sites dominated by <em>Kalmia angustifolia<\/em> L. Hence, a conifer revegetation trial was established on a <em>Kalmia<\/em>-dominated site to evaluate the effects of various silvicultural options and planted species on selected soil organic layer characteristics. <em>Larix laricina<\/em> (Du Roi) K. Koch, <em>Pinus banksiana<\/em> Lamb., and <em>Picea mariana<\/em> (Mill.) BSP seedlings were planted in plots with or without <em>Kalmia<\/em> control with herbicides. The effect of fertilizer amendment was also assessed. Seventeen years postplanting, organic layer fertility indicators suggest that soil fertility improved after <em>Kalmia <\/em>control and conifer reestablishment, especially if nitrogen (N) &#8211; phosphorus &#8211; potassium fertilizer was also applied. When <em>Kalmia<\/em> was controlled, aerobically mineralizable N and exchangeable sodium concentrations were increased; fertilizer addition to herbicided plots also increased exchangeable potassium and calcium concentrations, and cation exchange capacity compared with untreated control plots. Conifer height, diameter, and canopy closure were<em> Larix<\/em> &gt; <em>Pinus<\/em> &gt; <em>Picea<\/em>. <em>Kalmia<\/em> cover in control plots was 87%; <em>Kalmia<\/em> reinvasion in herbicided plots achieved 40%-43% cover but did not differ among the conifer species. Principal component analysis indicated that aerobically mineralizable N and total N were positively correlated with canopy closure. Our results suggest that increases in organic-layer fertility were related to increased conifer size resulting from <em>Kalmia<\/em> control.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Canadian Journal of Forest Research 39: 1270-1279 Growth rates of young conifers can be poor on disturbed sites dominated by Kalmia angustifolia L. Hence, a conifer revegetation trial was established on a Kalmia-dominated site to evaluate the effects of various silvicultural options and planted species on selected soil organic layer characteristics. Larix laricina [&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-82114","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>Controlling Kalmia and reestablishing conifer dominance enhances soil fertility indicators in central Newfoundland, Canada - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Growth rates of young conifers can be poor on disturbed sites dominated by a conifer revegetation trial was established\" \/>\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\/controlling-kalmia\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Controlling Kalmia and reestablishing conifer dominance enhances soil fertility indicators in central Newfoundland, Canada - 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