PotvinTardif1988

Référence

Potvin, C., Tardif, S. (1988) Sources of Variability and Experimental Designs in Growth Chambers. Functional Ecology, 2(1):123-130.

Résumé

Analysis of experiments conducted in growth chambers depends upon the sources of variation affecting plant growth. In this paper, three sources of variation are examined, namely a chamber and a time effect as well as the interaction between these two main effects. Experimental designs are suggested for all possible combinations of presence or absence of these three effects. The comparison of the designs unveils vast differences due to the cause of variation. Thus, knowledge of the sources of variation in plant growth appears obligatory to decide upon the most appropriate analysis. To illustrate how the causes of variations can be determined, experiments were conducted with Phaseolus vulgaris L. The design used allowed to test the main effects of time and chamber as well as the interaction of both parameters. Computation of variance components indicates that more than 90% of the variance is due to the random deviation and that there is no time effect on growth of this species.

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@ARTICLE { PotvinTardif1988,
    AUTHOR = { Potvin, C. and Tardif, S. },
    TITLE = { Sources of Variability and Experimental Designs in Growth Chambers },
    JOURNAL = { Functional Ecology },
    YEAR = { 1988 },
    VOLUME = { 2 },
    PAGES = { 123-130 },
    NUMBER = { 1 },
    ABSTRACT = { Analysis of experiments conducted in growth chambers depends upon the sources of variation affecting plant growth. In this paper, three sources of variation are examined, namely a chamber and a time effect as well as the interaction between these two main effects. Experimental designs are suggested for all possible combinations of presence or absence of these three effects. The comparison of the designs unveils vast differences due to the cause of variation. Thus, knowledge of the sources of variation in plant growth appears obligatory to decide upon the most appropriate analysis. To illustrate how the causes of variations can be determined, experiments were conducted with Phaseolus vulgaris L. The design used allowed to test the main effects of time and chamber as well as the interaction of both parameters. Computation of variance components indicates that more than 90% of the variance is due to the random deviation and that there is no time effect on growth of this species. },
    DOI = { 10.2307/2389472 },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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