Variação do incremento anual ao longo do fuste de &lt;i&gt;Pinus taeda&lt;/i&gt; L. em diferentes idades e densidades populacionais.

Andrade, César Martins; Finger, César Augusto Guimarães; Thomas, Cláudio; Schneider, Paulo Renato

doi:10.5902/198050981955

Cited by 11 publications

(9 citation statements)

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“…Under lesser competition conditions (such as: greater spacing, lower age), the trees tend to increase in diameter at the base of the bole, to assure greater support to the weight of the trunk and crown. However, when the tress as susceptible to greater competition, the trend to invest on the diameter increment at the superior areas of the bole, which provides a cylindrical shape (Andrade et al, 2007). In this work, the stand conducted under the coppice regime presented a larger number of boles per area unit and, consequently, the competition between the specimens is greater, causing a lesser conical shape on the boles.…”

Section: Discussionmentioning

confidence: 71%

Bole Profile of Eucalyptus Under Two Conduction Regimes in the Southwest Region of the Brazilian State Bahia

Azevedo

Castro

et al. 2017

Rev. Árvore

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The study of the bole profile is an important tool in the forest production management, which is influenced by several factors, such as the stand conduction regime. This work aimed to evaluate two stand conduction regimes regarding the Eucalyptus urophylla bole in the southwest region of the Brazilian state, Bahia. The data used was retrieved from stands conducted under high forest and coppice regimes. The tapering models proposed by Kozak, Demaerschalk, Ormerod, Garcia and Garay were adjusted, being selected the ones that presented better performances regarding adjustment statistics and graphic analysis of residue for each conduction regime. The models selected were validated by the chi-squared test (α = 0,05). Considering the models selected, it was possible to estimate the value of the diameter along the bole of the average-tree, allowing to evaluate the bole profile for each stand conduction regime. The identity test of the models showed that the stand conduction regime affects the shape of the trees' bole, making a necessity to adjust a specific equation for each situation. The bole tends to present a cylindrical form in a stand conducted in a coppice regime and conical one in a high forest regime.

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Section: Discussionmentioning

confidence: 71%

Bole Profile of Eucalyptus Under Two Conduction Regimes in the Southwest Region of the Brazilian State Bahia

Azevedo

Castro

et al. 2017

Rev. Árvore

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“…Intervenções como o desbaste podem influenciar nas respostas do povoamento, principalmente no que tange seu desenvolvimento, embora a resposta não seja de forma imediata (Glufke et al, 1997;Pelissari et al, 2013). Os incrementos iniciais ocorrem mais lentamente após os desbastes, pois há readaptação de sistema radicular e da arquitetura de copas das árvores remanescentes (Andrade et al, 2007).…”

Section: Resultsunclassified

Crescimento radial e fator de forma artificial de árvores de teca em Alta Floresta do Oeste, Rondônia

Carneiro

Albuquerque

Souza

et al. 2018

RCA

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Radial growth and artificial form factor of teak trees in Alta Floresta do Oeste, Rondônia Contribuição dos autores: Márcia Fernanda Carneiro realizou os experimentos e a escrita científica, Wagner Walker de Albuquerque Alves orientou a pesquisa com contribuição na análise estatística e interpretação dos dados, Camilla de Oliveira Souza contribuiu com revisão bibliográfica e a escrita científica, Ana Paula Câmara auxiliou na redação e correção gramatical do texto, João Gabriel Missia da Silva contribuiu com correção ortográfica e escrita científica, Elayne Katia dos Santos Galvão contribuiu com escrita científica e correção ortográfica e gramatical. Agradecimentos: A empresa de consultoria ambiental JVS pelo fornecimento do material de pesquisa, a Fundação Universidade Federal de Rondônia pelo suporte prestado no momento da coleta do material e a CAPES e FAPES pela concessão de bolsas auxílio a pesquisa dos autores. Fontes de financiamento: Não houve fonte de financiamento. Conflito de interesse: Os autores declaram não haver conflito de interesse.

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“…However, differently than expected, this work noticed the greatest amount at 60% of the commercial height, compared to 40% height, and observed, from 60%, a new trend of reduction of wood density towards the top of the tree. Possibly, reversing the upward trend of the density was a result of increased competition, which causes enlargement of the growth rings in the highest parts, resulting in the formation of more cylindrical stems (Assmann, 1970;Andrade et al, 2007, Curto, 2015.…”

Section: Resultsmentioning

confidence: 99%

Density of Araucaria angustifolia wood from overstocked stand

et al. 2016

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The aim of this work was to evaluate the radial and longitudinal variations of wood specific gravity in an overstocked stand of Araucaria angustifolia, with 65 years. The stand was located in the National Forest of Açungui, Campo Largo, Parana State, Brazil, with thinning recorded between 1970 and 1980, without subsequent thinnings. We selected three trees for each diameter class: 10-30 cm, 30-50 cm and 50-70 cm. To the longitudinal analysis, we collected discs from seven heights (0, 20, 40, 60, 80 and 100% of commercial stem and at 1.3 m). The barks were removed and it was obtained opposite wedges until pith and five samples were taken in radial direction from each disk. In general, there was an increase of wood specific gravity in radial direction. The average differed significantly along the stem, with decreasing trend of wood specific gravity in the longitudinal direction. However, average specific gravity at 60% of commercial height was higher than at 40%, than reducing to the top, indicating effect of competition that occurred in the area. The no uniform wood along stem indicates negative effects of the lack of management in the stand.Index terms: Quality of wood; Radial and longitudinal variations; CompetitionMassa específica básica da madeira de Araucaria angustifolia em povoamento superestocadoO objetivo do presente trabalho foi avaliar as variações radiais e longitudinais de massa específica básica da madeira em um plantio superestocado com 65 anos de Araucaria angustifolia. O plantio, localizado na Floresta Nacional de Açungui, Campo Largo, PR, foi desbastado entre 1970 e 1980, não havendo registros de desbastes posteriores a essa data. Foram selecionadas três árvores para cada classe de diâmetro: 10-30 cm, 30-50 cm e 50-70 cm. Para a análise longitudinal, foram seccionados discos em sete alturas (0, 20, 40, 60, 80 e 100% da altura comercial e a 1,3 m do solo), sendo removidas as cascas e retiradas duas cunhas opostas até a medula e cinco corpos de prova no sentido radial de cada disco. Em geral, na direção radial houve aumento da massa específica. As médias da massa específica diferiram estatisticamente ao longo do fuste, com diminuição da massa específica na direção longitudinal. No entanto, a massa específica média a 60% da altura comercial foi maior do que a 40%, com redução a partir dessa altura em direção ao topo, indicando efeito da competição que ocorreu na área. A desuniformidade da madeira ao longo do fuste é um indicativo dos efeitos negativos da falta de manejo na área.

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Variação do incremento anual ao longo do fuste de <i>Pinus taeda</i> L. em diferentes idades e densidades populacionais.

Cited by 11 publications

References 0 publications

Bole Profile of Eucalyptus Under Two Conduction Regimes in the Southwest Region of the Brazilian State Bahia

Bole Profile of Eucalyptus Under Two Conduction Regimes in the Southwest Region of the Brazilian State Bahia

Crescimento radial e fator de forma artificial de árvores de teca em Alta Floresta do Oeste, Rondônia

Density of Araucaria angustifolia wood from overstocked stand

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