PLANTING DENSITY EFFECT ON SOME PROPERTIES OF Schizolobium parahyba WOOD

Luiz Eduardo de Lima Melo, Claudia de Jesus Silva, Thiago de Paula Protásio, Graciene da Silva Mota, Iedo Souza Santos, Claudia Viana Urbinati, Paulo Fernando Trugilho, Fábio Akira Mori

Abstract


This study aims to understand the effect of the initial planting density on the anatomical variability and basic wood density of Schizolobium parahyba var. amazonicum in a planted forest in Amazonia. The effect of the initial planting density on the radial variation from pith to bark of anatomy and
basic density was evaluated. There were two planting densities, planting density-I (624 trees ha-1) and planting density-II (312 trees ha-1). Planting density significantly affected only the ray height, fiber
length and wall thickness. Radial position was not significant to the height of the rays and the fiber lumen diameter. The interaction planting density × radial position was only significant for the length of the vessel elements, ray frequency and fiber length. The results indicate that the initial planting density influences the radial behavior of certain anatomical characteristics. To obtain gain in terms of total wood per cultivated area, without harm to the density of the produced wood, planting density-I would
be most useful, while planting density-II would be suitable for the production of more homogeneous wood, which tends to form adult wood in advance and with some anatomical characteristics appropriate
for the plywood industry.

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