ESTIMAÇÃO DE VOLUMES DE Araucaria angustifolia (Bertol.) O. Kuntze POR FATORES DE FORMA EM CLASSES DIAMÉTRICAS E MODELOS DE REGRESSÃO

摘要: Due to lack of simple, robust and accurate models for volumetric estimation in Araucaria angustifolia, despite many previous works, this study aimed evaluate the use form factor by diametric class compared with regression estimate volume an stand situated Quedas do Iguacu PR. A total 50 trees had their determined. Three techniques were statistically: medium factor, factors diameter classes equations. The individual ranged from 0.49 0.97, average 0.59. values per 0.54 0.69. Among seven tested logarithmic Spurr gave best performance. was technique that provided most precise estimates, breaking paradigm always equations generate better quality results factor. However, application general biased estimates less (underestimation), especially thickest trees. For this, it concluded is option case.