Canadian Forest Service Publications

Identification de descripteurs morphométriques sensibles aux conditions générales de croissance des semis de chêne rouge (Quercus rubra) en milieu naturel. 1995. Trencia, J. Can. J. For. Res. 25: 157-165.

Year: 1995

Issued by: Laurentian Forestry Centre

Catalog ID: 16665

Language: French

Availability: PDF (request by e-mail)

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Red oak (Quercus rubra L.) seedlings measuring less than 1 m in height were collected from seven sites in the Québec City region. The sites were grouped according to pedology, dendrometry, and phytosociology. The object of this study was to select morphometric characteristics that are most sensitive to global differences in growth conditions. Most of the variables studied are frequently used to assess seedling performance in greenhouse or laboratory experiments. The characteristics measured included total stem height; mean annual increment of the biomass; number, mass, and length of the roots; shoot/root dry mass ratio; specific root length. Two topologic variables were also measured: the total external pathlengh and the diameter of the root system, as defined by Fitter. The topologic variables and number of roots differentiated well the various groups of sites. Among the variables chosen, it is possible to estimate the value of the ones that are most difficult to assess, from less time-consuming variables.