The Target Seedling Concepts: Bud Dormancy and Cold-Hardiness.
Bud dormancy and cold-hardiness vary markedly throughout the annual growth cycle of trees in the tem - perate zone and have a profound impact on the ability of tree seedlings to withstand lifting, storage, and outplanting stresses. The Degree Growth Stage model is a useful tool for visualizing the changes in bud dormancy and cold- hardiness and their relationship to changes in other physi- ological attributes, such as root growth potential and stress resistance. Relationships among these attributes pro- vide an opportunity to infer the status of one from another. The level of cold-hardiness can be used to infer bud dormancy status, as well as general stress resistance, at the time of lifting because all are correlated with perfor- mance, and cold-hardiness is easiest to measure. Practical approaches for measuring bud dormancy and cold-hardi- ness, and for routine monitoring for associated physiologi-cal targets, are discussed.
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Author(s): Karen E. Burr
Publication: National Nursery Proceedings - 1990
Event:
Combined Meeting of the Western Forest Nursery Associations
1990 - Roseburg, OR
