MamashitaLarocqueDesRochersEtAl2015

Référence

Mamashita, T., Larocque, G.R., DesRochers, A., Beaulieu, J., Thomas, B.R., Mosseler, A., Major, J., Sidders, D. (2015) Short-term growth and morphological responses to nitrogen availability and plant density in hybrid poplars and willows. Biomass and Bioenergy, 81:88-97. (Scopus )

Résumé

Morphological characteristics of poplar and willow clones were determined in order to identify main characteristics leading to superior growth under increased plant competition with low or high nitrogen (N) availability. Seven hybrid poplar (Populus spp. including one hybrid aspen) and five willow (Salix spp.) clones were grown under greenhouse conditions for 13 weeks at three spacings (20×20, 35×35, and 60×60cm) and two N levels (20 and 200mgkg-1). The decrease in spacing from 60 to 20cm reduced leaf area by 50% but clones had similar aboveground biomass per tree under all spacings, with increasing their height per unit leaf area. More productive clones had greater leaf area (+102%), leaf area per unit plant biomass (+12%) and lower root-to-shoot ratios (-27%) compared to less productive clones. There were positive relationships between leaf area and above-ground biomass per tree for both more and less productive clones. Compared to low N level and 60cm spacing, trees growing in high N level and 20cm spacing reached similar root collar diameter, crown width, and leaf area values and even greater height, suggesting that an addition of N could help mitigate negative effects of tree competition. © 2015 Elsevier Ltd.

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@ARTICLE { MamashitaLarocqueDesRochersEtAl2015,
    AUTHOR = { Mamashita, T. and Larocque, G.R. and DesRochers, A. and Beaulieu, J. and Thomas, B.R. and Mosseler, A. and Major, J. and Sidders, D. },
    TITLE = { Short-term growth and morphological responses to nitrogen availability and plant density in hybrid poplars and willows },
    JOURNAL = { Biomass and Bioenergy },
    YEAR = { 2015 },
    VOLUME = { 81 },
    PAGES = { 88-97 },
    NOTE = { cited By 0 },
    ABSTRACT = { Morphological characteristics of poplar and willow clones were determined in order to identify main characteristics leading to superior growth under increased plant competition with low or high nitrogen (N) availability. Seven hybrid poplar (Populus spp. including one hybrid aspen) and five willow (Salix spp.) clones were grown under greenhouse conditions for 13 weeks at three spacings (20×20, 35×35, and 60×60cm) and two N levels (20 and 200mgkg-1). The decrease in spacing from 60 to 20cm reduced leaf area by 50% but clones had similar aboveground biomass per tree under all spacings, with increasing their height per unit leaf area. More productive clones had greater leaf area (+102%), leaf area per unit plant biomass (+12%) and lower root-to-shoot ratios (-27%) compared to less productive clones. There were positive relationships between leaf area and above-ground biomass per tree for both more and less productive clones. Compared to low N level and 60cm spacing, trees growing in high N level and 20cm spacing reached similar root collar diameter, crown width, and leaf area values and even greater height, suggesting that an addition of N could help mitigate negative effects of tree competition. © 2015 Elsevier Ltd. },
    AUTHOR_KEYWORDS = { Competition; Hybrid aspen; Hybrid poplars; Morphological characteristics; N availability; Willows },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.biombioe.2015.06.003 },
    KEYWORDS = { Biomass; Cloning; Competition; Ecology; Nitrogen, Hybrid aspen; Hybrid poplar; Morphological characteristic; N availability; Willows, Forestry, Biomass; Competition; Greenhouse Effect; Populus; Salix, Populus; Salix },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84933059431&partnerID=40&md5=6a68b4015159448144822f40a7044d16 },
}

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