LechowiczShaver1982

Référence

Lechowicz, M.J., Shaver, G.R. (1982) A multivariate approach to the analysis of factorial fertilization experiments in Alaskan arctic tundra. Ecology, 63(4):1029-1038.

Résumé

Canonical analysis was used to analyze the results of factorial NPK fertilization trials on species growing in arctic tundra: the graminoids Eriophorum vaginatum and Carex bigelowii, the deciduous shrubs Betula nana and Vaccinium uliginosum, and the evergreen shrubs V. vitis-idaea and Ledum palustre. In unfertilized controls, the graminoids were richer in K than the other growth forms, deciduous shrubs had higher concentrations of N relative to P and Ca than the evergreen shrubs, and the deciduous-evergreen contrasts were greatest early in the growing season. NPK fertilization triggered disproportionate increases in K concentration in the graminoids and increased N relative to P and Ca in the evergreen shrubs. The effect of fertilization of nutrient balance of the deciduous shrubs in the spring following fertilization was like that of the evergreen shrubs but by late summer had shifted to the graminoid pattern. Nitrogen and P consistently produced contrasting shifts in the nutrient balance in all 3 growth forms. In contrast to the 2 Vaccinium shrubs, the nutrient balance of E. vaginatum was strongly affected by any fertilization involving K. In general, factorial combinations of N, P, and/or K produced shifts in the nutrient balance qualitatively intermediate to those resulting from the nutrients added singly. -from Authors

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@ARTICLE { LechowiczShaver1982,
    AUTHOR = { Lechowicz, M.J. and Shaver, G.R. },
    TITLE = { A multivariate approach to the analysis of factorial fertilization experiments in Alaskan arctic tundra },
    JOURNAL = { Ecology },
    YEAR = { 1982 },
    VOLUME = { 63 },
    PAGES = { 1029-1038 },
    NUMBER = { 4 },
    NOTE = { 00129658 (ISSN) Cited By (since 1996): 11 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { Canonical analysis was used to analyze the results of factorial NPK fertilization trials on species growing in arctic tundra: the graminoids Eriophorum vaginatum and Carex bigelowii, the deciduous shrubs Betula nana and Vaccinium uliginosum, and the evergreen shrubs V. vitis-idaea and Ledum palustre. In unfertilized controls, the graminoids were richer in K than the other growth forms, deciduous shrubs had higher concentrations of N relative to P and Ca than the evergreen shrubs, and the deciduous-evergreen contrasts were greatest early in the growing season. NPK fertilization triggered disproportionate increases in K concentration in the graminoids and increased N relative to P and Ca in the evergreen shrubs. The effect of fertilization of nutrient balance of the deciduous shrubs in the spring following fertilization was like that of the evergreen shrubs but by late summer had shifted to the graminoid pattern. Nitrogen and P consistently produced contrasting shifts in the nutrient balance in all 3 growth forms. In contrast to the 2 Vaccinium shrubs, the nutrient balance of E. vaginatum was strongly affected by any fertilization involving K. In general, factorial combinations of N, P, and/or K produced shifts in the nutrient balance qualitatively intermediate to those resulting from the nutrients added singly. -from Authors },
    KEYWORDS = { Betula nana Carex bigelowii Eriophorum vaginatum Ledum palustre Vaccinium uliginosum Vaccinium vitis idaea },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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