Diferentes modelos para o afilamento do tronco de Eucalyptus sp. para o cenário florestal brasileiro

Ciencia Florestal

article

Lucas Kröhling Bernardi¹  Monica Fabiana Bento Moreira Thiersch¹  Argemiro José Moreno Arteaga²  Alessandro Araujo Amaral de Almeida³  Franciane Andrade de Pádua¹  Cláudio Roberto Thiersch¹ 

[1] Universidade Federal de São Carlos;Universidade Federal de Campina Grande;Eucatex

关键词: Multiproducts;    Modeling techniques;    Assortment;    Stem shape;   

DOI  :  10.5902/1980509840376

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

Taper functions are useful tools for estimating log diameters and commercial wood volumes at any height, being of great importance to forestry enterprises that aim to optimize the use of their forests. Thus, the aim of this work was to evaluate segmented, non-segmented and variable-exponent taper models for studying the trunk taper of Eucalyptus sp. With a database from a 6.3-year-old Eucalyptus sp. planted forest, in the south of the state of São Paulo, the taper models tested were: the non-segmented models of Schöepfer (1966) and Ormerod (1973) the segmented model of Max and Burkhart (1976), and the variable-exponent models of Muhairwe (1999), Methol (2001) apud Rachid et al. (2014) and Kozak (2004). Real volumes were calculated using the Smalian formula. The equation proposed by Kozak (2004) obtained the best accuracy to estimate the diameters, whereas the Muhairwe (1999) equation showed the best graphic dispersion results for the same estimate. For volume estimation, the equation that obtained the best results was that proposed by Methol (2001) apudRachid et al. (2014), with the best measures of precision and better graphical behavior, with smaller trends and more concentrated dispersion of the residues.

【 授权许可】

CC BY-NC