Trois types de contenants de diffkrents volumes (Polymos 15,Three types of containers of different volumes (Polymos 15, 700 cm3; Polymos 1 2 , l 000 cm3; WhitcombMD, 3 500 cm3) ont 700 cm3; Polymos 12,1,000 cm3; whitcomb@, 3,500 cm3) were 6tk mis B l'essai pour produire des plants d'arbres feuillus de fortes tested to produce large hardwood seedlings. Studies of growth and dimensions. L'ktude des rksultats de croissance et du dkvelopperoot development of three species, white ash (Frauinus americum ment racinaire de trois espbces, frsne blanc (Fruxinus americana L.), bur oak (Quercus macrocarpa Michx.) and northern red oak L.), chCne B gros fruits (Quercus macrocarpa Michx.) et ch&ne (Quercus rubra L.) were used to assess containers after two rouge (Quercus rubra L.), a servi B l'6valuation des contenants growing seasons in an unheated plastic shelter. The mean height aprbs deux ans de croissance. La hauteur moyenne des plants proof seedlings increased with the volume of the containers. The total duits sous I'abri d'un tunnel de plastique non-chauffk, &it plus dry mass of seedlings at 55 cm in height was more important in Blevke pour les contenants de plus grand volume. La masse the larger container; the total root mass and the proportion of sec&he totale des plants ayant aeint une hauteur de 55 a augment& ondary roots were higher in the container of greater volume. For aussi avec Ie volume du contenant; la masse racinaire et la prothe two species of oak, the 3,500 cm3 container produced duction de racines secondaires Ctaient plus &levees dans le plus seedlings with a taproot showing a number of deviations when grand contenant. Pour les deux espbces de chsnes, le contenant touching the bottom of the container. White ash, a species with de 3 500 cm3 a produit des plants dent la racine pivotante presena fibrous root system, showed a higher deviation index in the smalltait de nombreuses dkviations induites au fond du contenant. Le er containers. The openings on the sides of the square-shaped fiene, dent le dBveloppement racinaire est fascicu16 montrait un Whitcomb@ containers were effective for the air-pruning of secindice de dkviation plus Clevk dans les contenants de plus faible o n d~ lateral roots of @ a with a taproot and their volume aUowed volume. Les ouvertures lathales des contenants carrks du type for an important root miss. However, the flat bottom with openWhitcomb ant permis de bien cemer les racines secondaires des ings at each of the four comers did not prevent deviation of the es@ces B racine pivotante. Le volume de la cavite a favoris6 forte-Proot. IntroductionDepuis plusieurs anntes, diverses mtthodes de culture ont Ctt exptrimenttes afin de maximiser la production de plants forestiers de qualit6 (Hathaway et Whitcomb 1977;Tinus 1980;Klingaman et King 1983; Whitcomb 1984;Labrecque et Popovich 1987,1988 Gingras 1993). La production en contenant comporte plusieurs avantages, le principal Ctant qu'il conduit B l'ttablissement d'un systkme racinaire prottgt qui se dtveloppe avec un minimum de contrain...
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