Comparative study of the anatomy and basic density of wood of the varieties of Schizolobium Parahyba var. Amazonicum (Huber ex Ducke) Barneby and Schizolobium Parahyba var. Parahyba (vell.) Blake in a plantation in the Amazon.
Anatomical characterization. Paricá. Guapuruvu.
In order to contribute to a more detailed knowledge about the anatomy and density of the paricá and guapuruvu wood, the dimensions of the cellular elements and wood basic density in the different longitudinal and radial positions of these woods from a plantation with the same ages, spacing, and environmental conditions. The present study aimed to assess the differences between paricá and guapuruvu in terms of wood basic density and anatomical characteristics. Five trees were collected from each of the four origins of paricá and guapuruvu, at the age of 6 years, with spacing of 4 x 3 m. Discs were removed at the base position and DAP, which was divided into wedges for anatomical and density analysis. Wood specimens were obtained, duly oriented for making the histological cuts, macerated, and determination of the wood basic density in three equidistant positions on the disc (near the pith, intermediate between the pith and the bark, and near the bark). The varieties of paricá and guapuruvu showed statistically significant differences for density and quantitative anatomical characteristics of fibers, vessels and rays.