{"id":82761,"date":"2019-01-30T12:14:19","date_gmt":"2019-01-30T17:14:19","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/soil-solution-foliar-concentrations\/"},"modified":"2019-01-30T12:14:19","modified_gmt":"2019-01-30T17:14:19","slug":"soil-solution-foliar-concentrations","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/soil-solution-foliar-concentrations\/","title":{"rendered":"Soil solution, foliar concentrations and tree growth response to 3-year of ammonium-nitrate addition in two boreal forests of Qu\u00e9bec, Canada"},"content":{"rendered":"\n<p>Published in <strong>Forest Ecology and Management 255: 2049-2060<\/strong><\/p>\n<p>Ammonium nitrate (NH<sub>4<\/sub>NO<sub>3<\/sub>) was applied monthly (from June to October) for 3 years in a balsam fir (<em>Abies balsamea <\/em>(Linn\u00e9) Miller) and a black spruce (<em>Picea mariana<\/em> (Mill.) BSP) boreal forest in Qu\u00e9bec (Canada). The design was composed of nine experimental units of 10 m x 10 m for each site. Application rates were 3 and 10 times the atmospheric N deposition measured at each site which was 6 and 3 kg ha<sup>-1<\/sup> year<sup>-1<\/sup> for the fir and the spruce sites, respectively. Soil solution composition (30 and 60 cm), tree growth, and foliar concentrations were analysed. The inorganic N in the soil solution of the control plots of both sites was low, particularly at the spruce site indicating that these forests are actively accumulating the atmospheric deposited N. Nitrogen additions regularly caused sudden and large inorganic N increases in the soil solution at both sites, both treatments and both sampling depths. However, these increases were transitory in nature and no persistent changes in inorganic N were observed. It was estimated that more than 95% of the added N was retained above the rooting zone at both sites. Nitrogen addition increased N, Ca, Mg and Mn foliar concentrations at the black spruce site but had no effects at the balsam fir site. After 3 years of N application, tree growth was similar in the control and the treated plots at both sites. Our results show that slow growing black spruce boreal forests with low ambient N deposition are responsive (in term of foliar N, Ca, Mg and Mn concentrations) to even small increases in N inputs, compared to higher growth balsam fir boreal forests with higher N deposition.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Published in Forest Ecology and Management 255: 2049-2060 Ammonium nitrate (NH4NO3) was applied monthly (from June to October) for 3 years in a balsam fir (Abies balsamea (Linn\u00e9) Miller) and a black spruce (Picea mariana (Mill.) BSP) boreal forest in Qu\u00e9bec (Canada). The design was composed of nine experimental units of 10 m x 10 [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1183,1185,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1091,1099],"class_list":["post-82761","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-ecosystems-and-environment","cptt_theme-forest-ecology","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-d-houle","cptt_auteurs_ministeriels-j-d-moore"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Soil solution, foliar concentrations and tree growth response to 3-year of ammonium-nitrate addition in two boreal forests of Qu\u00e9bec, Canada - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Ammonium nitrate was applied monthly for 3 years in a balsam fir and a black spruce boreal forest in Qu\u00e9bec\" \/>\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\/soil-solution-foliar-concentrations\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soil solution, foliar concentrations and tree growth response to 3-year of ammonium-nitrate addition in two boreal forests of Qu\u00e9bec, Canada - 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