publication . Article . 1996

Freezing temperatures and exposure times during bud break and shoot elongation influence survival and growth of containerized black spruce (Piceamariana) seedlings

C. Hébert; Francine J. Bigras;
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  • Published: 01 Aug 1996 Journal: Canadian Journal of Forest Research, volume 26, pages 1,481-1,489 (issn: 0045-5067, eissn: 1208-6037, Copyright policy)
  • Publisher: Canadian Science Publishing
Abstract
<jats:p> Spring frosts frequently cause significant damage to conifer seedlings during bud flushing and shoot elongation in forestry nurseries. To insure adequate protection, levels of frost sensitivity must be known during these stages of development. Eight- or 9-month-old containerized black spruce seedlings (Piceamariana (Mill.) BSP) were submitted to freezing temperatures of 0° to −10 °C for 1–6 h at the following stages: (1) nonswollen terminal buds, (2) swollen terminal buds, (3) terminal bud scales bursting, needle tips emerging, and (4) shoots elongating, 1−5 cm. After freezing, seedlings were grown for 130 days in a greenhouse. Seedling survival was est...
Subjects
free text keywords: Ecology, Forestry, Global and Planetary Change, Black spruce, Annual growth cycle of grapevines, Frost (temperature), Botany, Biology, Frost, Seedling, biology.organism_classification, Elongation, Shoot, Bud, Horticulture
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