Volume Estimate for Three Timber Species With Commercial Interest From the Diameter of the Stump

Abstract

The commercial volume of trees can be calculated directly and indirectly. However, in areas of illegal deforestation, the stem is often not available for dendrometric measurements and, consequently, calculation of the commercial volume and the use of the direct method. On the other hand, the use of the indirect method is impossible due to the lack of equations with possible measurement variables. In order to make the volume estimate feasible in these cases, the objective of this work was to estimate the commercial volume of wood from individual trees using regression equations, using measurements made on the stump for three species of commercial interest, in areas of timber forest management, namely: Dipteryx odorata (Aubl.) Willd., Apuleia leiocarpa (Vogel) JFMacbr. and Amburana acreana (Ducke) A.C.Sm. Data were collected in two management areas, located in the municipalities of Sena Madureira and Rio Branco, with a sample of 250 stumps. Statistical tests were carried out to analyze regression and choose the best equations that would estimate the volume of the species selected for the study, based on the diameter of the stump. Tests of accuracy, precision, assumptions, validation and identity model were applied for choice. Models that met the research objectives for both species were tested with R²adj = 87.7% for Dipteryx odorata (Aubl.) Willd., R²adj = 81.8% for Apuleia leiocarpa (Vogel) J.F.Macbr. and R²adj = 70.5% for Amburana acreana (Ducke) A.C.Sm., as well as meeting all the assumptions of the regression resulting in the validation of the equations adjusted by the selected models.

Áreas potenciais à silvicultura do Cumaru (Dipteryx odorata (Aubl.) Willd.) em polos bioeconômicos estratégicos no estado do Pará

“…No estado do Pará, a maior concentração de D. odorata foi observada no mapa de Kernel (Figura 2), onde é possível constatar que as microrregiões Óbidos, Santarém, Furo de Breves, Cametá, Tomé-Açu, Guamá, Bragantina, Castanhal, Salgado e Arari apresentara uma maior densidade de ocorrência. Considerando as microrregiões com maior concentração de D. odorata, nota-se que a presença é maior em floresta ombrófila densa, caracterizada pela presença de arbustos, árvores de pequeno, médio e grande porte, além de lianas, como descrito por Lima et al (2021). Em outras fitofisionomias, como a floresta ombrófila aberta e a floresta estacional decidual, houve uma suavização na densidade da espécie.…”

“…Para garantir a sustentabilidade na produção de madeira, é essencial que se tenha um conhecimento detalhado da distribuição geográfica natural da espécie em questão (PINHEIRO et al, 2020), a fim de evitar a exploração em áreas que não são adequadas para o seu crescimento ou que possuam alta sensibilidade ambiental (MAGALHÃES-JÚNIOR et al, 2017). Além disso, é importante obter o conhecimento da ocorrência onde há exploração, para que possa contribuir para a conservação da espécie, pois pode estimular a conservação da vegetação nativa, assim como proporcionar uma renda para as populações locais, o que pode incentivar a manutenção do ecossistema (GIATTI et al, 2021;LIMA et al, 2021).…”

Agroforestry Harvesting Residue: A Case Study in Private Forests in Probolinggo, East Java, Indonesia

“…A tree volume model is constructed by employing regression analysis to establish a correlation between the diameter and height of a tree. Several tree volume models have been established in various types of forests, including natural forest concessions, plantation forests, and private forests managed with agroforestry systems (Almulqu et al 2023;Ardelina et al 2015;Lima et al 2021;Sumadi et al 2010;Susanty and Abdurrachman 2016;Qirom and Supriyadi 2012). Furthermore, researchers have also devised tree volume models to assess the volume of forest biomass and carbon Heru et al 2009), as well as forest stand biomass (Tiryana et al 2021).…”

Dendrometric Relationships and Biomass in Commercial Plantations of Dipteryx spp. in the Eastern Amazon

“…has been the subject of study in a large number of recent research projects. However, these studies are primarily concentrated on wood production in native forests [29,34] and the potential use of almonds and coumarin [21,35,36].…”