Abstract
Heartwood (HW) and tension-wood (TW) significantly varied with the trees of different diameters and along the heights. Heartwood and tension-wood formation was positively affected by growth. Heartwood formation in proportion to sapwood (SW) was low during the early phase of the tree growth thereafter stabilized after DBH of 20 cm. The fiber dimensions also stabilized after the same period of growth. SW/HW (heart-wood/sap-wood) and NW/TW (normal wood/tension wood) ratio showed decline trend with growth parameters. Tension-wood formation in proportion to normal-wood (NW) also stabilized as in case of heartwood after certain period of growth. SW/HW ratio showed negative relationship with fiber length. NW/TW also showed the similar type of relationship. However, specific gravity increased after certain period of growth then declined. Significant variations due to direction in wood anatomical properties and specific gravity indicated the influence of tension wood on the wood properties.
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