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Comparing Juvenile Wood Depictions in the Literature to Wood Property Maps for Mature Longleaf Pines

Collection of wood disks from 70-year-old longleaf pine trees in the Palustris Experimental Forest, Longleaf Tract, Kisatchie National Forest, Louisiana
Juvenile wood in the southern pines is usually shown as a central core of wood surrounded by mature wood, the latter tapering down in thickness when moving from the base of a tree to its crown. The present study addresses the degree to which different juvenile wood depictions presented in the literature are applicable to a sampling of 70-yr-old longleaf pine (Pinus palustris Mill.) trees.
 
Fiscal Year
2020
Research Station
Research Unit(s)
Wood Anatomy and Forest Mycology in a Changing Global Environment
Principal Investigator(s)
State(s)
Wisconsin
Juvenile wood (corewood) has been widely studied given its high contribution to the wood resource, especially for usable timber obtained at short rotation ages. Reviews of juvenile wood in the literature provide insight into its physiological origin, anatomical features, chemical/physical/mechanical properties, and utilization. Several illustrations of juvenile wood in pines have been generated to explain the variability in the aforementioned properties in a typical pine tree stem. The present study addresses the degree to which different representations of juvenile wood are applicable to a sampling of 70-yr-old longleaf pine (Pinus palustris Mill.) trees. Wood property maps were derived from X-ray densitometry data gathered from tree disks taken at every 61 cm along each tree bole. Altogether, the wood property maps and data comparisons suggest that the more complex illustrations of juvenile wood appear to align with the study trees, attributable in part to their maturity, and near maximum attainable height.
Publications
Forest Service Partners
  • Southern Research Station, Restoring and Managing Longleaf Pine Ecosystems, Pineville, LA
External Partners
  • Louisiana State University AgCenter
  • University of Georgia
https://www.fs.usda.gov/research/news/highlights/comparing-juvenile-wood-depictions-literature-wood-property-maps-mature-longleaf