Abstract
Drying is an important process in the generation of wood products, as it increases the quality of the final products; however, it is influenced by various anatomical characteristics. The aim of this study was to evaluate the influence of anatomy on the drying of wood of Parapiptadenia rigida (Benth.) Brenan, Peltophorum dubium (Spreng.) Taub., Eucalyptus grandis W. Hill × Eucalyptus urophylla S.T. Blake (hybrid), and Schizolobium parahyba (Vell.) Blake trees from an agroforestry system. Three trees aged 9 years were sampled for each species. The trees were removed from the study region when their diameter at breast height (DBH) was 1.30 m from the ground. Blocks were made with dimensions of 5.0 × 5.0 × 15.0 cm for the evaluation of oven drying and 1.5 × 1.5 × 2.0 cm for anatomical features. S. parahyba has the highest value of fiber diameter (35.1 µm) and lumen diameter (27.6 µm), whereas P. dubium had the highest value of cell wall thickness (6.8 µm). The average equilibrium moisture content was 10.98% after 40 days of drying. The anatomy of the wood influenced the drying of the four species intensity, which was related to humidity during all periods. The anatomical parameters that most influenced drying were fiber diameter (Pearson correlation coefficient: 0.77), lumen diameter (0.76), and fiber cell wall thickness (0.73); the higher the values, the greater was the drying intensity.
Highlights
Agroforestry systems (SAFs) involve the introduction of forest components for interactions with agricultural components
S. parahyba wood had the highest values for fiber diameter (35.1 μm), lumen diameter (27.6 μm) and vessel diameter (187.1 μm)
The species showed differences between each other in all evaluated anatomical parameters. This characteristic is important, because a heterogeneous collection of materials is warranted to assess the influence of anatomical parameters on the drying process more accurately (ZANUNCIO et al, 2016)
Summary
Agroforestry systems (SAFs) involve the introduction of forest components for interactions with agricultural components. SAFs are promising alternatives to establishing consortiums of both native and exotic tree species for wood production while simultaneously conserving natural resources. E. et al ISSN eletrônico 1982-4688 the productivity or quality of wood derived from SAFs and monocultures of trees, such systems are responsible for yielding economic benefits by diversifying production in small rural properties and generating income. They enhance ecological benefits such as the reduction of soil degradation (CARON et al, 2018), protecting the surrounding environment
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