Abstract
Abstract Forest harvest residues are usable; however, studies on their quality are incipient. Thus, our study sought to perform physico-mechanical characterization of wood from the branches of Astronium lecointei and Manilkara huberi, as well as to compare its properties with trunk material found in the literature. The material was collected in the Tapajos National Forest (Flona - Tapajos) and cut for the trials performed at the Universidade Federal do Oeste do Para (Ufopa). Descriptive statistics were used for data analysis and the averages were compared with values found in the literature for the trunk of the studied species and other commercial wood of the region. The physical properties of Astronium lecointei and Manilkara huberi showed approximate averages to those of trunk, while the mechanical properties presented lower averages. Therefore, regarding the mechanical properties, the residues may be substituents for the trunks of other species for having similar properties.
Highlights
AND OBJECTIVESBranches, flat roots and trunk remains, among others, are understood as residues of forest harvesting
A study conducted by Silva-Ribeiro (2016) in the state of Pará shows that about 0.4 m3 for each cubic meter of wood harvested in logs are left in the forest in the form of residues
The material used in our study was from the Tapajós National Forest, located at coordinates 2° 45’ and 4° 10’ S and 54° 45’ and 55° 30’ W at Km 83 of the Santarém-CuiabáBR-163 Highway, coming from an area of forest management activity certified by the Forest Stewardship Council (FSC)
Summary
Flat roots (sapopemas) and trunk remains, among others, are understood as residues of forest harvesting. The legislation clarifies the obligatory nature of studies that subsidize this activity, especially regarding the dendrometry In this sense, a study conducted by Silva-Ribeiro (2016) in the state of Pará shows that about 0.4 m3 for each cubic meter of wood harvested in logs are left in the forest in the form of residues (twigs > 20 cm in diameter). A study conducted by Silva-Ribeiro (2016) in the state of Pará shows that about 0.4 m3 for each cubic meter of wood harvested in logs are left in the forest in the form of residues (twigs > 20 cm in diameter) Studies such as that by Shen et al (2009) and Nati et al (2017) show the possibility of using this material as an energy source; other uses can be evaluated according to their dimensions. Regarding the wood from branches, it is questioned if the properties are discrepant when compared with the trunk; in addition to performing the physical and mechanical characterization of the wood from branches of Astronium lecointei and Manilkara huberi, our study sought to compare the results with trunk data found in the literature
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