{"id":82211,"date":"2019-01-30T12:14:43","date_gmt":"2019-01-30T17:14:43","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/experimental-acidification-alkalinization-soil\/"},"modified":"2019-01-30T12:14:43","modified_gmt":"2019-01-30T17:14:43","slug":"experimental-acidification-alkalinization-soil","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/experimental-acidification-alkalinization-soil\/","title":{"rendered":"Effects of experimental acidification and alkalinization on soil and growth and health of Acer saccharum Marsh"},"content":{"rendered":"\n<p>Published in <strong>Journal of Plant Nutrition and Soil Science 171: 858-871<\/strong><\/p>\n<p>Experimental application of eight acidifying, neutral, or alkalizer compounds (range: \u201316 to 16 kmol ha<sup>\u20131<\/sup> of acid-neutralizing capacity [ANC]) was realized in two northern hardwood stands having significantly different soil base saturation (BS) (a \u201cpoor\u201d and a \u201crich\u201d site) to assess responses of soil physico-chemical properties, and nutrition, growth, and health of sugar maple (<em>Acer saccharum<\/em> Marsh.) trees in the short (3 y) and longer term (10 y). The treatments influenced the main indicators of acidity in the forest floor (soil exchangeable-Ca saturation [S<sub>Ca<\/sub>], BS, exchangeable-acidity saturation [S<sub>H+Al<\/sub>], and the S<sub>Ca<\/sub>\/S<sub>H+Al<\/sub> ratio) at both sites, their values increasing (decreasing for S<sub>H+Al<\/sub>) along the ANC treatment gradient in both the short and longer term, except for pH. Base saturation of the upper 15 cm of the mineral B horizons of soils was influenced at the two sites 10 y after treatment application. Although ANC treatments affected nutrient concentrations of tree foliage in the short term, their effect was no longer detectable after 10 y at the two sites. Growth, however, was strongly related to ANC treatments after 10 y, but only at the poor site. From 1990 to 2000, the basal-area growth rate of trees at the poor site was (mean \u00b1 SE) \u20130.62 \u00b1 0.28 cm<sup>2<\/sup> y<sup>\u20132<\/sup> tree<sup>\u20131<\/sup> for the most negative ANC treatment to +0.90 \u00b1 0.20 cm<sup>2<\/sup> y<sup>\u20132<\/sup> tree<sup>\u20131<\/sup> for the most positive ANC treatment. A climatic-stress episode occurring in 1995\/96 appeared to accentuate the growth decline of trees subjected to the most negative ANC treatment at the poor site. The experimental results support the hypothesis that atmospheric acid deposition load can cause forest soil base-cation depletion, acidification, and predispose sugar maple to health and growth decline in the longer term in base-cation-poor soils, and that the phenomenon may be reversible by adding alkalizers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Journal of Plant Nutrition and Soil Science 171: 858-871 Experimental application of eight acidifying, neutral, or alkalizer compounds (range: \u201316 to 16 kmol ha\u20131 of acid-neutralizing capacity [ANC]) was realized in two northern hardwood stands having significantly different soil base saturation (BS) (a \u201cpoor\u201d and a \u201crich\u201d site) to assess responses of soil [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1183,1185,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1082,1099,1102],"class_list":["post-82211","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-duchesne-louis","cptt_auteurs_ministeriels-j-d-moore","cptt_auteurs_ministeriels-r-ouimet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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