Fibril angle of loblolly pine wood as related to specific gravity, growth rate, and distance from pith

Abstract

Fibril angles were greater for earlywood (avg. 33.4^o) than for latewood tracheids (avg. 26.9^o). For earlywood, fibril angle did not differ between growth rates when the specific gravity was low (avg. 33.3^o). When the specific gravity was high, wood of fast growth had a higher fibril angle (avg. 35.1^o) than wood of slow growth (avg. 32.0^o). No differences were detected between core, middle, and outer wood. In the latewood tracheids, fibril angles were greater in corewood (avg. 28.0^o) than in middle or outer wood (Avg. 26.3^o). For whole wood (a weighted average of earlywood and latewood), fibril angle averaged 30.7^o and was greater in corewood (avg. 32.2^o) than in middle or outer wood (avg. 29.9^o).

Citation

McMillin, Charles W. 1972. Fibril angle of loblolly pine wood as related to specific gravity, growth rate, and distance from pith. Wood Science and Technology, Vol. 7: 251-255