HouleMoore2008

Référence

Houle, D., Moore, J.-D. (2008) Soil solution, foliar concentrations and tree growth response to 3-year of ammonium-nitrate addition in two boreal forests of Qu�bec, Canada. Forest Ecology and Management, 255(7):2049-2060. (Scopus )

Résumé

Ammonium nitrate (NH4NO3) was applied monthly (from June to October) for 3 years in a balsam fir (Abies balsamea (Linné) Miller) and a black spruce (Picea mariana (Mill.) BSP) boreal forest in Québec (Canada). The design was composed of nine experimental units of 10 m × 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-1 year-1 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. © 2007 Elsevier B.V. All rights reserved.

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@ARTICLE { HouleMoore2008,
    AUTHOR = { Houle, D. and Moore, J.-D. },
    TITLE = { Soil solution, foliar concentrations and tree growth response to 3-year of ammonium-nitrate addition in two boreal forests of Qu�bec, Canada },
    JOURNAL = { Forest Ecology and Management },
    YEAR = { 2008 },
    VOLUME = { 255 },
    PAGES = { 2049-2060 },
    NUMBER = { 7 },
    NOTE = { cited By 16 },
    ABSTRACT = { Ammonium nitrate (NH4NO3) was applied monthly (from June to October) for 3 years in a balsam fir (Abies balsamea (Linné) Miller) and a black spruce (Picea mariana (Mill.) BSP) boreal forest in Québec (Canada). The design was composed of nine experimental units of 10 m × 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-1 year-1 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. © 2007 Elsevier B.V. All rights reserved. },
    AUTHOR_KEYWORDS = { Boreal forest; Foliar concentration; Nitrogen fertilization; Nitrogen saturation; Soil solution; Tree growth },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.foreco.2007.10.056 },
    KEYWORDS = { Ammonium compounds; Growth kinetics; Nitrogen fertilizers, Boreal forests; Foliar concentration; Nitrogen fertilization; Nitrogen saturation; Soil solution; Tree growth, Forestry, ammonium nitrate; atmospheric deposition; boreal forest; coniferous tree; fertilizer application; growth response; inorganic nitrogen; rhizosphere; soil quality, Ammonium Compounds; Fertilizers; Forestry; Growth, Canada; North America; Quebec [Canada], Abies; Abies balsamea; Picea; Picea mariana },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-42149150957&partnerID=40&md5=b7d6f15f3de55fd7a9e4e3c3f65fb02b },
}

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