Crown structure of a codominant Douglas-fir

Document Type

Article

Journal/Book Title/Conference

J. For. Res.

Volume

13

Publication Date

1-1-1983

First Page

264

Last Page

269

Abstract

Results are presented from an intensive study of crown structure in a 39-year-old codominant Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco). The patterns of crown development observed may represent a species adaptation for maximizing photosynthetic efficiency. While branches originating at nodes provide the basic structure of the crown, short-lived nonnodal branches provide much of the photosynthetic capacity. In addition, nonnodal branches support nearly half of the young needles near the top and outside edges of the crown.

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