Air-Layering of Norway Spruce and Blue Spruce
During the growing seasons of 1955, and 1956, attempts were made to propagate Norway spruce (Pi cea abies L. Karst) and blue spruce (Picea pungens Engelm.) trees vegetatively by the air-layering method. Numerous reports of the successful vegetative propagation of Norway spruce have appeared in the forestry literature since the first successful experiments were reported by Deuber and Farrar (1940)¹. All of these reports described experiments which dealt with the rooting of cuttings either in the greenhouse or in outdoor frames or with the multiplication by grafting. Because good results have been obtained by air-layering several species in the genus Pinus (Mergen, 1955)² experiments were designed to test the applicability of this method to the vegetative propagation of Norway and blue spruce.
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Author(s): Francois Mergen
Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1957