Guittonny-LarchevequeBussierePednault2016

Référence

Guittonny-Larcheveque, M., Bussiere, B., Pednault, C. (2016) Tree-substrate water relations and root development in tree plantations used for mine tailings reclamation. Journal of Environmental Quality, 45(3):1036-1045. (Scopus )

Résumé

Tree water uptake relies on well-developed root systems. However, mine wastes can restrict root growth, in particular metalliferous mill tailings, which consist of the finely crushed ore that remains after valuable metals are removed. Thus, water stress could limit plantation success in reclaimed mine lands. This study evaluates the effect of substrates varying in quality (topsoil, overburden, compost and tailings mixture, and tailings alone) and quantity (50- or 20-cm-thick topsoil layer vs. 1-m2 plantation holes) on root development and water stress exposure of trees planted in low-sulfide mine tailings under boreal conditions. A field experiment was conducted over 2 yr with two tree species: basket willow (Salix viminalis L.) and hybrid poplar (Populus canadensis Moench × Populus maximowiczii A. Henry). Trees developed roots in the tailings underlying the soil treatments despite tailings' low macroporosity. However, almost no root development occurred in tailings underlying a compost and tailings mixture. Because root development and associated water uptake was not limited to the soil, soil volume influenced neither short-term (water potential and instantaneous transpiration) nor long-term (δ13C) water stress exposure in trees. However, trees were larger and had greater total leaf area when grown in thicker topsoil. Despite a volumetric water content that always remained above permanent wilting point in the tailings colonized by tree roots, measured foliar water potentials at midday were lower than drought thresholds reported for both tested tree species. © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. 5585 Guilford Rd., Madison, WI 53711 USA.

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@ARTICLE { Guittonny-LarchevequeBussierePednault2016,
    AUTHOR = { Guittonny-Larcheveque, M. and Bussiere, B. and Pednault, C. },
    TITLE = { Tree-substrate water relations and root development in tree plantations used for mine tailings reclamation },
    JOURNAL = { Journal of Environmental Quality },
    YEAR = { 2016 },
    VOLUME = { 45 },
    NUMBER = { 3 },
    PAGES = { 1036-1045 },
    NOTE = { cited By 4 },
    ABSTRACT = { Tree water uptake relies on well-developed root systems. However, mine wastes can restrict root growth, in particular metalliferous mill tailings, which consist of the finely crushed ore that remains after valuable metals are removed. Thus, water stress could limit plantation success in reclaimed mine lands. This study evaluates the effect of substrates varying in quality (topsoil, overburden, compost and tailings mixture, and tailings alone) and quantity (50- or 20-cm-thick topsoil layer vs. 1-m2 plantation holes) on root development and water stress exposure of trees planted in low-sulfide mine tailings under boreal conditions. A field experiment was conducted over 2 yr with two tree species: basket willow (Salix viminalis L.) and hybrid poplar (Populus canadensis Moench × Populus maximowiczii A. Henry). Trees developed roots in the tailings underlying the soil treatments despite tailings' low macroporosity. However, almost no root development occurred in tailings underlying a compost and tailings mixture. Because root development and associated water uptake was not limited to the soil, soil volume influenced neither short-term (water potential and instantaneous transpiration) nor long-term (δ13C) water stress exposure in trees. However, trees were larger and had greater total leaf area when grown in thicker topsoil. Despite a volumetric water content that always remained above permanent wilting point in the tailings colonized by tree roots, measured foliar water potentials at midday were lower than drought thresholds reported for both tested tree species. © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. 5585 Guilford Rd., Madison, WI 53711 USA. },
    AFFILIATION = { Université du Québec, Abitibi-Temiscamingue - Research institute in mines and the environment, 445, boul. de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada; Malartic Mine, 100, chemin du Lac Mourier, Malartic, QC J0Y 1Z0, Canada },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.2134/jeq2015.09.0477 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969784592&doi=10.2134%2fjeq2015.09.0477&partnerID=40&md5=d46d4da6cd1160c92d772794ac8e47b6 },
}

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