Internodal changes in ring width along a red pine system : Dickenwachstum der Bäume

Wien

1981

S. 57-66

4 Abb., 7 Lit. Ang.

Unselbständiges Werk

200004859

Internodal and nodal changes in ring width in a red pine (Pinus resinosa Ait.) stem are presented, based on measurements at 5-6 points throughout internodes of a 40-year-old codominant tree. A strong basal incrase in ring eidth occurred within the first and second internodes from the apex. This lessened in lower internode positions, becoming a slight overall decrease below the internode of maximum width (inernode 5). Within the internodes above and below the crown base, however, there was again a slight overall basal increase in ring width. Thereafter there was little change within the internodes until the region of butt swell. At the first and second nodes there was a large indrease in width from one internode to tent decreases at nodes within and for some distance below the lower crown, with the greatest decrease occuring at or near the crown base. These decreases at the nodes were greater than the increases within the internodes. Thus overall longitudinal changes in the width of the growth layer selves. Associated changes in cross-sectional area and relationships to braches are also discussed.