Ten-year growth comparison between rooted cuttings and seedlings of loblolly pine
نویسندگان
چکیده
Rooted cuttings and seedlings of loblolly pine (Pinus taeda L.) were established in a central Alabama field trial. Five, full-sib families, with an average number of six clones per family, were evaluated. Mean cutting/seedling height ratios revealed that despite initial differences in size, relative growth rates of both propagule types stabilized and were equal by age 7 years. Through age 10 years, results show virtually no difference in height, diameter at breast height, volume, or stem taper between the rooted cuttings and seedlings. R&urn6 : Des boutures racinCes et des semis de pin g encens (Pinus taeda L.) ont CtC Ctablis dans une plantation dans le centre de 1’Alabama. Cinq descendances biparentales, avec un nombre moyen de six clones par descendance, ont CtC &al&es. Les ratios moyens de la hauteur des boutures sur celles des semis montrent que, malgrC les diffkrences initiales de dimension, les taux de croissance relative des deux types de propagules se sont stabilisCs et Ctaient Cgaux apr&s 7 ans. Jusqu’g 10 ans, les rCsultats ne comportent pratiquement aucune diffkrence dans la hauteur, le diamktre g hauteur de poitrine, le volume ou le dCfilement de la tige entre les boutures racinCes et les semis. [Traduit par la RCdaction]
منابع مشابه
Effects of Nursery Characteristics on Field Survival and Growth of Loblolly Pine Rooted Cuttings
Morphological characteristics of rooted cuttings and seedlings of four open-pollinated loblolly pine families cultured at the G.H.W. Weyerhaeuser Nursery near Washington, North Carolina were assessed after lifting. Cuttings were visually assigned to nine grading classes and six putative cull classes. The nine grading classes represented a factorial of three root collar diameter classes (small [...
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