Economic feasibility and rotation age for stands of candeia (Eremanthus erythropappus)

Silva, Carolina Souza Jarochinski e; Oliveira, Antônio Donizette de; Rezende, José Luiz Pereira de; Mello, José Márcio de; Scolforo, José Roberto Soares

doi:10.1590/s0104-77602012000400020

Cited by 9 publications

(9 citation statements)

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“…The need for thinning for trees planted at wider spacing was between the twelfth and thirteenth year in T03 (1.5 x 2.5 m spacing) and between the thirteenth and fourteenth year in T04 (1.5 x 3.0 m spacing). Because candeia is a slow growing species, its economic rotation is estimated to be between 12 and 15 years (Silva et al, 2012). Thus, we recommend using an initial spacing greater than 3.75 m 2 per plant, avoiding the need for thinning, since thinning interventions were estimated to be needed only after 12 years for spacing equal to or greater than 3.75 m 2 .…”

Section: Dbh Growth Groupsmentioning

confidence: 99%

Management strategies of Eremanthus erythropappus (DC.) MacLeish under different initial spacing

et al. 2016

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Eremanthus erythropappus, commonly known as candeia, is an income-generating tree native to Brazil. This is due to the high durability of its wood and its essential oil containing the active component alpha bisabolol. Despite this economic potential, until the early 2000's no studies existed to explore the sustainable management in areas in which the species naturally occurs or for establishing commercial plantations. This study proposes new management strategies based on an individual tree model, and evaluates the growth behavior of candeia trees planted in different spacing. The experiment was installed in March 2002, in Carrancas municipality, Minas Gerais state, Brazil. The experimental area was divided into 4 blocks with 4 different spacings as treatments. The individual model used to propose the best management system uses development of crown area as a function of DBH. The results showed that candeia trees were sensitive to initial spacing variation. With increased initial spacing, candeia trees reached competition later, as demonstrated by crown area development. Thus, candeia trees planted at a wider spacing maintain a desirable growth rate without need for thinning for a longer time, compared to trees planted at narrower spacing. The fitted individual tree model presented in this study showed consistent results and flexibility, providing alternatives for different management strategies. The best growth response was obtained for planting densities greater than 3.75 m² per tree, which corresponds to a spacing of 1.5 x 2.5 m.Index terms: Crown area; stand density; monomolecular model; individual tree model. RESUMOEremanthus erythropappus, conhecida vulgarmente por candeia, é uma árvore nativa do Brasil, geradora de renda devido à elevada durabilidade apresentada por sua madeira e, também, pelo seu óleo produzido conter, como ingrediente majoritário, o alfa bisabolol. Apesar deste potencial econômico, até o início do ano 2000, a espécie não contemplava estudos sobre seu sistema de cultivo, tanto para o manejo sustentável em áreas de ocorrência natural quanto para o estabelecimento de plantios comerciais. Este estudo propõe estudar novas estratégias de manejo com base em modelo de árvore individual, e avaliar o crescimento da candeia em diferentes espaçamentos. O experimento teve início em março de 2002, no município de Carrancas, Minas Gerais, Brasil. A área experimental foi dividida em quatro blocos, com quatro diferentes espaçamentos como tratamentos. O modelo avaliado para definir o melhor sistema de manejo foi baseado na relação entre o desenvolvimento da área de copa e do DAP das árvores. Os resultados mostraram que a candeia foi sensível a variação no espaçamento inicial. Aumentando o espaçamento inicial, a competição entre as árvores de candeia ocorre mais tarde, ou seja, à medida que o espaçamento aumenta demora-se mais para que o plantio perca o ritmo desejado de crescimento. O modelo testado foi consistente e a técnica baseada na árvore individual apresentou flexibilidade, fornecendo alte...

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Section: Dbh Growth Groupsmentioning

confidence: 99%

Management strategies of Eremanthus erythropappus (DC.) MacLeish under different initial spacing

et al. 2016

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“…Initial studies indicate spacing of 1.5 × 2.0 m provides good growth rates (Silva et al, 2012b). According to Silva et al, spacings denser than the one cited may decrease the growth rate so that it becomes unfeasible technically.…”

Section: The Commercial Cultivation Of Eremanthus Erythropappusmentioning

confidence: 99%

Sustainable Management of Eremanthus erythropappus in Minas Gerais, Brazil – A Review

et al. 2018

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We reviewed key studies published so far regarding Eremanthus erythropappus (DC.) MacLeish (Candeia), in order to approach the sustainable management of this species. The objective of this study was to discuss what is already known by the scientific community, presenting the current scenario and outlining the main challenges that still need to be addressed. Candeia is a tree species found in some Brazilian states, being used in the production of fence posts, and essential oils. It aids in the preservation and restoration of natural areas when properly managed, promoting social development through the creation of jobs and economic growth, due to the current high demand and market value for its products. Due to the high value of its timber, there is a strong anthropic pressure on this species, and it has consequently been exploited in an unsustainable manner. However, already published research suggests that well-managed stands of Eremanthus erythropappus can be economically feasible.

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“…In the period from 1980 to 2010, up to 250 tons of Candeia oil were harvested ( De Oliveira et al, 2010 ), which is predominantly collected by grubbing trees from the wild. Economic quantities of (–)-α-bisabolol can only be distilled from trees older than 10 years implying the risk of deforestation for oil extraction ( Silva et al, 2012 ). As an alternative to collection from the wild, commercial exploitation of Candeia plantation would be an attractive solution for the production of high quality timber and natural (–)-α-bisabolol ( Silva et al, 2012 ; Scolforo et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Identification of the Bisabolol Synthase in the Endangered Candeia Tree (Eremanthus erythropappus (DC) McLeisch)

et al. 2018

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Candeia (Eremanthus erythropappus (DC) McLeisch, Asteraceae) is a Brazilian tree, mainly occurring in the cerrado areas. From ethnobotanical information its essential oil is known to have wound healing and nociceptive properties. These properties are ascribed to result from a sesquiterpene alcohol, (–)-α-bisabolol, which is present at high concentrations in this oil. Bisabolol is highly valued by the cosmetic industry because of its antibacterial, anti-inflammatory, skin-smoothing and wound healing properties. Over the past decades, Candeia timber has been collected at large scale for bisabolol extraction from wild reserves and the species is thereby at risk of extinction. To support the development of breeding and nursing practices that would facilitate sustainable cultivation of Candeia, we identified a terpene synthase gene, EeBOS1, that appears to control biosynthesis (–)-α-bisabolol in the plant. Expression of this gene in E. coli showed that EeBOS1 protein is capable of producing (–)-α-bisabolol from farnesyl pyrophosphate in vitro. Analysis of gene expression in different tissues from Candeia plants in different life stages showed a high correlation of EeBOS1 expression and accumulation of (–)-α-bisabolol. This work is the first step to unravel the pathway toward (–)-α-bisabolol in Candeia, and in the further study of the control of (–)-α-bisabolol production.

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Economic feasibility and rotation age for stands of candeia (Eremanthus erythropappus)

Cited by 9 publications

References 10 publications

Management strategies of Eremanthus erythropappus (DC.) MacLeish under different initial spacing

Management strategies of Eremanthus erythropappus (DC.) MacLeish under different initial spacing

Sustainable Management of Eremanthus erythropappus in Minas Gerais, Brazil – A Review

Identification of the Bisabolol Synthase in the Endangered Candeia Tree (Eremanthus erythropappus (DC) McLeisch)

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