DIAMETER: THE BASAL AREA RATIO RELATION WITH THE SELF-THINNING IN Pinus taeda L. EVEN-AGED STAND

• Autor(a) principal: Schneider, Paulo Sérgio Pigatto
• Data de Publicação: 2013
• Outros Autores: Finger, César Augusto Guimarães, Schneider, Paulo Renato
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/8451
• topic: self-thinning; d; G ratio; density; Pinus taeda; autodesbaste; relação d; G; densidade; Pinus taeda

http://dx.doi.org/10.5902/198050988451This work undertakes to study de diameter: the basal area ratio at the moment of occurrence of self-thinning of Pinus taeda L. stand in some spacings, considering its full density. For that, the Tang model was used in order to relate the density of trees with the diameter, with data of permanent plots, measured annually until 18 years-old. The results indicate that self-thinning model for Tang presented excellent precision and high efficiency, however with distinct slope coefficient of the praised one for Tang (-3/2) resulting a value of -1,6523. At the moment of occurrence of self-thinning, trees reached diameter equal to 14 and 17 cm, in the spacing of 2 x 2 or 3 x 2 m, with basal area of 38,8 and 47,5 m²/ha, respectively. In these spacings, the maximal basal area was of 78 m²/ha, in 18 years-old, rising tendency. In these spacing, the diameter: the basal area ratio at the moment of occurrence of self-thinning was 0,36 and 0,37, respectively.