Crescimento de povoamentos de eucalipto não-desbastados

• Ano de defesa: 2006
• Autor(a) principal: Demolinari, Raul de Abreu
• Orientador(a): Soares, Carlos Pedro Boechat
• Banca de defesa: Leite, Hélio Garcia , Souza, Agostinho Lopes de , Nogueira, Gilciano Saraiva , Silva, Gilson Fernandes da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Ciência Florestal
• Departamento: Manejo Florestal; Meio Ambiente e Conservação da Natureza; Silvicultura; Tecnologia e Utilização de
• País: BR
• Palavras-chave em Português: Eucalipto; Crescimento; Populações; Modelos matemáticos; Inventário florestal
• Palavras-chave em Inglês: Eucaliptus; Stands; Growth; Mathematical models; Forest inventory
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::MANEJO FLORESTAL
• Link de acesso: http://locus.ufv.br/handle/123456789/3052

This study was carried out with the objective to evaluate the growth of a non-thinned Eucalyptus stand and, more specifically, to evaluate the growth of the components: ingrowths, mortality, and stand growth in terms of number of trees per hectare over time; the behavior of stand variables and the changes of stand diameter classes over time using transition probability matrixes. In order to acomplish that, data from continuous forest inventory obtained from cloned E. urophylla x E. grandis hybrid stands from the JARI CELULOSE S/A company, in Pará State, Brazil were used. Sixty three permanent plots even distributed in terms of productivity capacity (High, Medium and Low) were selected. After the analysis, some conclusions were taken: a) the stand medium diameter variables (q), basal area per hectare (B/ha), total volume with (Vc/c/ha) and without bark (Vs/c/ha) per hectare, dominant height (Hd) and total height (Ht) have a direct relationship with different growth rates over time; b) the competition between plants starts earlier in the best sites, implying earlier stagnation of growth; c) a direct relationship exists between the tree size and growth dynamics. Bigger trees, in an young age, reach a higher height in older ages. Consequently, the probability of death is higher in the small diameter classes; d) the number of surviving trees in the highest productivity site is greater in the first years after planting. Nevertheless, with time, this behavior reversed due to the start of competition process; e) the mortality tended to be normally distributed; f) The mortality occurred almost in trees that did not changed diameter class, i. e., for trees with lower growth rates; g) the ingrowths in the smaller diameter classes occurred independently of the site productivity capacity and stand ages. Nevertheless, few trees ingrowths; h) the PIANNAR & SCHIVER model was fitted well to the data, showing it s high flexibilit.