PareBergeronLongpre2001

Référence

Pare, D., Bergeron, Y. and Longpre, M.H. (2001) Potential productivity of aspen cohorts originating from fire, harvesting,and tree-fall gaps on two deposit types in northwestern Quebec. Canadian Journal of Forest Research, 31(6):1067-1073.

Résumé

Height growth of trembling aspen (Populus tremuloides Michx.) standsoriginating from three different disturbance types (fire, clearcut,and tree-fall gap) was compared on two different deposits (glacialtill and lacustrine clay) in the Abitibi region in northwesternQuebec using stem analysis techniques. Several soil properties werealso measured to investigate relationships between soil propertiesand aspen growth. Height growth of aspen was not significantly differentamong stands of different origins, although on both deposits andat all stages of growth, trees originating from fire were the tallest.Differences in total height among stands of different origins wereless than 3 m at 50 years of age. The greatest differences in heightgrowth among stands were expected at younger stages likely becauseof lower light levels for trees originating from gaps at this stage,but the opposite was observed; height growth differences for 5-yearintervals were greater for taller trees. Height growth was greateron clay than on till soils but only for trees greater than 15 m.Soil pH and availability of nitrogen and calcium were correlatedwith aspen height growth on till soils, while only exchangeablecalcium was related to this property on clay soils. Fire had beneficialeffects on soils, because it increased soil pH and exchangeablecations. However, these effects did not significantly affect treegrowth over one or two rotations.

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@ARTICLE { PareBergeronLongpre2001,
    AUTHOR = { Pare, D. and Bergeron, Y. and Longpre, M.H. },
    TITLE = { Potential productivity of aspen cohorts originating from fire, harvesting,and tree-fall gaps on two deposit types in northwestern Quebec },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2001 },
    VOLUME = { 31 },
    PAGES = { 1067-1073 },
    NUMBER = { 6 },
    ABSTRACT = { Height growth of trembling aspen (Populus tremuloides Michx.) standsoriginating from three different disturbance types (fire, clearcut,and tree-fall gap) was compared on two different deposits (glacialtill and lacustrine clay) in the Abitibi region in northwesternQuebec using stem analysis techniques. Several soil properties werealso measured to investigate relationships between soil propertiesand aspen growth. Height growth of aspen was not significantly differentamong stands of different origins, although on both deposits andat all stages of growth, trees originating from fire were the tallest.Differences in total height among stands of different origins wereless than 3 m at 50 years of age. The greatest differences in heightgrowth among stands were expected at younger stages likely becauseof lower light levels for trees originating from gaps at this stage,but the opposite was observed; height growth differences for 5-yearintervals were greater for taller trees. Height growth was greateron clay than on till soils but only for trees greater than 15 m.Soil pH and availability of nitrogen and calcium were correlatedwith aspen height growth on till soils, while only exchangeablecalcium was related to this property on clay soils. Fire had beneficialeffects on soils, because it increased soil pH and exchangeablecations. However, these effects did not significantly affect treegrowth over one or two rotations. },
    KEYWORDS = { Clay Harvesting pH effects Positive ions Soil mechanics Soils Aspencohorts Tree growth Forestry disturbance growth productivity soilproperty tree Populus Soil Structure Canada },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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