Abstract
The properties of wood influence its use as a final product, so it is essential to know their relation and influence on the quality of preservation. In this sense, for the present study we aim at the determination of the physical properties of Corymbia citriodora [Eucalyptus citriodora Hook]; Eucalyptus camaldulensis Dehnh. and Eucalyptus camaldulensis Dehn. x Eucalyptus grandis, and the quality of the preservative treatment with CCA-C in an autoclave. We determined diameter, heartwood and sapwood percentages, and their relationship, as well as the basic density for the three genetic materials. The quality of the preservation was evaluated through the area treated and not treated by CCA, besides its penetration and retention. The highest proportion of sapwood, treated area, and highest density value was found in C. citriodora, whereas the hybrid E. camaldulensis x E. grandis presented the highest level of CCA retention. The diameter and density showed the highest correlation with CCA retention in wood, the length and moisture of the small logs also shown to be influential. All clones presented satisfactory chemical treatment quality for use as fence posts.
Highlights
Wood is an organic material, heterogeneous and highly variable in its properties and characteristics
The smaller diameter was observed in C. citriodora, with a value of 12.6 cm, being 14.13% lower than E. camaldulensis and 33.02% lower than E. camaldulensis x E. grandis (Table 1)
The highest percentage of sapwood was found in C. citriodora (76.47%), 31.82% higher than E. camaldulensis x E. grandis and 42.62% higher than E. camaldulensis (Table 1)
Summary
Wood is an organic material, heterogeneous and highly variable in its properties and characteristics. The most used wood in the global industry are those of Eucalyptus and Corymbia species (FAO, 2006). This is due to the characteristics of their trees and plantations, which present rapid growth, high ecological plasticity and broad industrial use (FERREIRA et al, 2017). In this way it is the most planted forest genera in the world and in Brazil, having occupied in 2016 more than 5.7 million hectares, 91% of the country's tree plantations (IBÁ, 2017). Considering the different sectors of the forest industry and their demand for materials of specific composition, a distinction and categorization of the wood properties is necessary
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