Effects of tree spacing and forking on the modification of wood density in a trial plantation of Tachigali vulgaris for energy in Amazonia
2022
Barros-Junior, U. O. | Rosário, W. A. S. | Lima, M. D. R. | Silva, M. O. S. | Patrício, E. P. S. | Gonçalves, D. A. | Bufalino, L. | Protásio, T. P.
The study investigated the intra-stem and inter-stem variations of wood basic density in Tachigali vulgaris, influenced by different planting spacing and the occurrence of forking in a trial carried out in Pará State, Brazil. The experiment was performed in a randomised block design, arranged in a split-plot scheme, where plot effect was constituted by planting spacing (4.5, 6.0, 7.5, 9.0, 10.5 and 12.0 m²) and forking, as the effect of subplot (forked or not forked). The wood basic density increased from narrower to wider planting spacings. The wood basic densities in planting spacings of 9 m² (0.517 g cm-³) and 12 m² (0.529 g cm-³) were 16.9 and 19.4% higher compared to the lowest planting spacing of 4.5 m²(< 0.500 g cm-³). Forking reduced wood density by almost 7% and promoted a wider variation within the stem. Forked stems decreased basic density towards the base-top direction. The findings suggested that, 87-months-old wood of T. vulgaris is suitable for energy purposes, and recommended for the establishment of homogeneous plantations in Brazilian Amazonia.
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