The production potential of oleoresin from 100 retapped and 36 first-time tapped trees of Copaifera multijuga Hayne was evaluated in the Indigenous Land Igarapé Lourdes (territory of Arara and Gavião ethnicities), Rondônia. The diameter at breast height (DBH) and the amount of oleoresin exuded was measured for each tree and the individuals were identified based on dendrological characteristics. The results indicate that relative frequency of yielding trees had similar pattern between retapped (39%) and those tapped for the first time (41.6%). The production ranged from 0 to 3.6 L/tree, with an overall average of 0.143 L/tree, where 0.157 L/tree was recorded for retapped and 0.104 L/tree for virgin trees. By excluding the non-yielding trees, the average yield of retapped trees is increased to 0.403 L/tree, while the virgins increased to 0.250 L/tree, but these differences were not statistically significant (t, p = 0.37). Retapped trees had higher average diameters (58 cm) and are statistically different (T, p = 0.001) from the virgins (46 cm). Positive correlation was found between production and diameter, being more significant for the virgins (0.61) than for the retapped trees (0.27). Despite the yield variability, there was a slight trend of lower oleoresin exudation from smaller DBH (30-40 cm) trees, which is one possible explanation for the lower production of virgin trees.Key words: Amazonia, non-timber forest products, management. O objetivo deste trabalho foi identificar e avaliar o potencial de produção de óleoresina de Copaifera multijuga Hayne, proveniente de 100 árvores re-exploradas e de 36 manejadas pela primeira vez no ano de 2008, na Terra Indígena Igarapé Lourdes (território das etnias Arara e Gavião), em Rondônia. Para cada árvore, foram medidos o diâmetro à altura do peito (DAP) e a quantidade de óleoresina liberada, e identificados os indivíduos, com base em características dendrológicas. Os resultados indicam que a frequência relativa de árvores produtivas teve padrão semelhante entre as re-exploradas (39%) e aquelas manejadas pela primeira vez (41,6%). A produção variou de 0 a 3,6 L/árvore, com média geral de 0,143 L/árvore, sendo 0,157 L/árvore para re-exploradas e 0,104 L/árvore para manejadas pela primeiras vez. Ao excluir as árvores improdutivas, as re-exploradas tiveram maior rendimento médio (0,403 L/árvore) do que as até então intactas (0,250 L/árvore), mas essas diferenças foram estatisticamente não significativas (t, p = 0,37). Árvores reexploradas têm médias diamétricas superiores (58 cm) e diferem estatisticamente (t, p = 0,001) das manejadas pela primeira vez (46 cm). Houve correlação positiva entre produção e diâmetro, sendo mais significativa para as até então intactas (0,61) do que para as re-exploradas (0,27). Apesar da variabilidade do rendimento, observou-se uma ligeira tendência, da menor liberação de óleoresina entre árvores com os menores DAPs (30 a 40 cm), sendo essa uma possível explicação para a menor produção encontrada para as árvores até então inexploradas.Palavras...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.