Relation of Crown and Foliage Traits to Height Growth of Sitka Spruce
Four crown and foliage traits of a young Sitka spruce (Picea sitchensis) stand were tested with rooted cuttings in greenhouse and field plots for possible thinning selection guidelines. Repeatability estimates of the amount of genetic control over the four traits and the relation of those traits to height growth were evaluated 5 years after rooting. Only the blue-green trait was significantly associated (P < 0.05) with height growth. Average height of cuttings selected for green foliage was 17% greater than cuttings selected for blue foliage. Under greenhouse conditions, repeatability estimates of green or blue foliage were 98% versus 66%, respectively; 72% versus 89% for trees with dense or open crowns, respectively; 65% for the comparison of upright and horizontal branches; and 75% for the comparison of long or short branches. West. J. Appl. For. 11(3):77-80.
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Document Type: Journal Article
Affiliations: (retired) USDA Forest Service, Pacific Northwest Research Station, Forestry Sciences Laboratory, 3200 SW Jefferson Way, Corvallis, OR 97331
Publication date: 1996-07-01
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- Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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