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Biometric assessment of early stem growth at a commercial stand of African mahogany (Khaya grandifoliola)
Matias, Renan Krupok; Brito, Camilla Nascimento; Resende, Rafael Tassinari; Rios, Jovan Martins; Santana, Gabriel Mendes; Oliveira, Guilherme Murilo de; Venturoli, Fábio.
  • Matias, Renan Krupok; Universidade UniAraguaia. Goiânia. BR
  • Brito, Camilla Nascimento; Universidade Federal de Goiás. Goiânia. BR
  • Resende, Rafael Tassinari; Universidade Federal de Goiás. Goiânia. BR
  • Rios, Jovan Martins; Universidade Federal de Goiás. Goiânia. BR
  • Santana, Gabriel Mendes; Universidade Federal de Paraná. Curitiba. BR
  • Oliveira, Guilherme Murilo de; Universidade Federal de Goiás. Goiânia. BR
  • Venturoli, Fábio; Universidade Federal de Goiás. Goiânia. BR
Biosci. j. (Online) ; 39: e39002, 2023. tab, graf
Article in English | LILACS | ID: biblio-1415861
ABSTRACT
African mahogany species (Khaya spp.) have proven to be promising in the Brazilian forestry scenario, replacing native mahogany owing to their medium-fast growth and relevant timber value. This study aimed to carry out forest inventory and assessments of a Khaya grandifoliola plantation in the first years after planting, test hypsometric models to describe tree growth, and identify the maximum commercial stem yield (i.e., greater than 6 m in height). The stand was located in the municipality of Piracanjuba (GO), where seedlings of seed origin were used. Twenty random plots with a 15 m radius were allocated, and the total height (HT), stem height (HS), diameter at breast height (DBH), crown area, and forest canopy were measured. Four hypsometric models were employed in this study. The best equation was selected based on determination coefficients and standard errors. Further, the models were cross-validated to evaluate predictability and bias. At four years of planting, the largest class of HS was found to range from 3.1 to 4.1 m, and most trees had a DBH ranging from 0.084 to 0.126 m. The percentage of trees with stems > 6 m was 8.35%. The linear model ensured more consistent results for estimating HT, while the quadratic and Weibull models led to more consistent results for HS. By using models, stem measurements can be measured based on DBH, ultimately aiding the selection of stem management strategies for the growth of forests with greater commercial value.

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Full text: Available Index: LILACS (Americas) Main subject: Wood / Meliaceae Type of study: Prognostic study Language: English Journal: Biosci. j. (Online) Journal subject: Agricultura / Disciplinas das Ciˆncias Biol¢gicas / Pesquisa Interdisciplinar Year: 2023 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal de Goiás/BR / Universidade Federal de Paraná/BR / Universidade UniAraguaia/BR

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Full text: Available Index: LILACS (Americas) Main subject: Wood / Meliaceae Type of study: Prognostic study Language: English Journal: Biosci. j. (Online) Journal subject: Agricultura / Disciplinas das Ciˆncias Biol¢gicas / Pesquisa Interdisciplinar Year: 2023 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal de Goiás/BR / Universidade Federal de Paraná/BR / Universidade UniAraguaia/BR