In:
Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 19, No. 11 ( 1989-11-01), p. 1397-1401
Abstract:
Xylem conducting tissue or sapwood is an important storage organ for water, carbohydrates, and nutrients, but the living ray parenchyma cells require energy for maintenance. I examined sapwood volume for three subalpine conifers (Engelmann spruce, subalpine fir, and lodgepole pine) in relation to tree size and leaf area. Sapwood volume increases exponentially as leaf area increases, with the rate of increase determined by the ratio of leaf area to sapwood cross-sectional area. Increase in the cost of sapwood maintenance respiration relative to photosynthetic production may explain lower relative growth rates reported for large trees and older stands. Lodgepole pine showed the most rapid increase in sapwood volume with increasing leaf area, suggesting storage capacity and sapwood maintenance are important processes for this species. I also present simple equations for estimating sapwood volume.
Type of Medium:
Online Resource
ISSN:
0045-5067
,
1208-6037
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1989
detail.hit.zdb_id:
1473096-0
SSG:
23
SSG:
12
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