CoteCamire1985

Référence

Cote, B. and Camire, C. (1985) Nitrogen cycling in dense plantings of hybrid poplar and black alder. Plant and Soil, 87(1):195-208.

Résumé

Nitrogen cycling was studied during the 3rd growing season in pure and mixed plantings (33 X 33 cm spacing) of hybrid poplar and black alder Alnus glutinosa in SE Canada. After 3 yr, hybrid poplar growth and N content of living tissues in a plot and of individual hybrid poplar plants increased with the proportion of black alder in a planting. No differences were detected among N contents of individual alder plants regardless of plot treatment. Black alder allocated a larger portion of its N to roots than hybrid poplar. Symbiotic N-fixation accounted for c80% of N in aboveground alder tissues in the pure treatment. N return in leaf litter was c70 kg ha-1 in the pure alder treatment and decreased to a minimum of 20 kg ha -1 in the pure hybrid poplar plots. No difference was detected among treatments for throughfall N content. Nitrogen concentration in roots and leaf litterfall of black alder was higher than hybrid poplar. Significant soil N accretion occurred in mixed plantings containing 2 alders to 1 poplar and pure black alder plantings. Nitrogen availability (NO3-N) increased with amount of black alder in a plot. The early increase in nitrogen accumulation of hybrid poplar in mixed treatments can be attributed to an increase of total soil N availability resulting from the input of large amounts of N from easily mineralizable alder tissue. - from Authors

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@ARTICLE { CoteCamire1985,
    AUTHOR = { Cote, B. and Camire, C. },
    TITLE = { Nitrogen cycling in dense plantings of hybrid poplar and black alder },
    JOURNAL = { Plant and Soil },
    YEAR = { 1985 },
    VOLUME = { 87 },
    PAGES = { 195-208 },
    NUMBER = { 1 },
    NOTE = { Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Nitrogen cycling was studied during the 3rd growing season in pure and mixed plantings (33 X 33 cm spacing) of hybrid poplar and black alder Alnus glutinosa in SE Canada. After 3 yr, hybrid poplar growth and N content of living tissues in a plot and of individual hybrid poplar plants increased with the proportion of black alder in a planting. No differences were detected among N contents of individual alder plants regardless of plot treatment. Black alder allocated a larger portion of its N to roots than hybrid poplar. Symbiotic N-fixation accounted for c80% of N in aboveground alder tissues in the pure treatment. N return in leaf litter was c70 kg ha-1 in the pure alder treatment and decreased to a minimum of 20 kg ha -1 in the pure hybrid poplar plots. No difference was detected among treatments for throughfall N content. Nitrogen concentration in roots and leaf litterfall of black alder was higher than hybrid poplar. Significant soil N accretion occurred in mixed plantings containing 2 alders to 1 poplar and pure black alder plantings. Nitrogen availability (NO3-N) increased with amount of black alder in a plot. The early increase in nitrogen accumulation of hybrid poplar in mixed treatments can be attributed to an increase of total soil N availability resulting from the input of large amounts of N from easily mineralizable alder tissue. - from Authors },
    KEYWORDS = { Alnus glutinosa Populus },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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