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| Mattos, Patrícia Póvoa de; Oliveira, Mariana Ferraz; Agustini, Andrea Fernanda; Braz, Evaldo Muñoz; Rivera, Hugo; Oliveira, Yeda Maria Malheiros de; Rosot, Maria Augusta Doetzer; Garrastazu, Marilice Cordeiro. |
| A Floresta Ombrófila Mista é considerada uma das principais formações do bioma Mata Atlântica. Apesar de sua importância, existe uma carência de informações sobre a dinâmica de crescimento de espécies dessa tipologia florestal. O presente estudo foi desenvolvido com o objetivo de estimar o crescimento passado de espécies arbóreas de Floresta Ombrófila Mista. Foram realizadas avaliações dendrocronológicas não destrutivas nas espécies Araucaria angustifolia, Ocotea porosa, Ilex paraguariensis, Cedrela fissilis, Ocotea puberula e Ocotea pulchella. O crescimento periódico médio em diâmetro até 2006 foi de aproximadamente 0,5 cm ano-1, para A. angustifolia, C. fissilis, O. porosa e O. pulchella. O. puberula e I. paraguariensis apresentaram crescimento periódico... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrocronologia; Crescimento diamétrico; Floresta nativa; Araucaria angustifolia Dendrochronology; Diametric growth; Native Forest; Araucaria angustifolia. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/102 |
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| Braz, Evaldo Muñoz; Mattos, Patricia Povoa; Thaines, Fabio; de Madron, Luc Durrieu; Garrastazu, Marilice Cordeiro; Canetti, Aline; d’Oliveira, Marcus Vinício Neves. |
| Remnant forest structure and increment by diameter class play a decisive role in the recovery volume for the next cutting cycle. Tree species in the Amazon Forest do not present a defined pattern of diameter structure, which is discussed here using Cedrela odorata L. as a case study The aim of this study was to identify, by simulation, recovery from logging in a real situation at three timber production sites, and the alternatives that are available to ensure commercial timber volume to a second cut cycle in the Brazilian Amazon. The study is concerned regarding the diametric classes of productive trees to the next cycle, the comparison demonstrates that one of the strategies recovers stock volume more quickly than expected in the cut cycle defined by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manejo florestal; Dendrometria Cedrela odorata; Sustainable forest management; Cut rate; Rain Forest; Volume recover; Diametric structure Cedrela odorata; Manejo florestal sustentável Taxa de corte Floresta tropical; Recuperação em volume; Estrutura diamétrica. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/941 |
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| d'Oliveira, Marcus Vinicio Neves; Oliveira, Luis Claudio; Acuña, Mario Humberto Aravena; Braz, Evaldo Muñoz. |
| We performed a forest growth dynamics study in Acre State, Brazilian southwestern Amazon, where a 20 ha area was logged in 1992. The study was based permanent sample plots (1 ha) established in the logged area and in an unlogged forest immediately after logging operations finished. Forest dynamics parameters were assessed in terms of aboveground dried biomass (AGB). During the study period, three extreme climate events triggered a high impact on both logged and unlogged areas, producing AGB losses greater than those estimated for logging. Twenty years after logging, ingrowth and mortality rates were similar to those expected in an undisturbed forest, and AGB recovery was significantly faster in the logged areas. Forest management, when properly applied,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos florestais; Engenharia florestal Forest management; Above-ground biomass; Experimental plots Gestão florestal; Biomassa acima do solo; Parcelas experimentais. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1398 |
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| Curto, Rafaella De Angeli; de Mattos, Patrícia Povoa; Braz, Evaldo Muñoz; Zachow, Randolf; Péllico Netto, Sylvio. |
| The objective of this study was to characterize of an unmanaged stand of Araucaria angustifolia and to development of models to quantify the wood potential, aiming to support the development of forest management plans in stands with similar conditions. The work was developed into a stand established in 1946, in National Forest of Açungui, in Campo Largo County, Paraná State, Brazil. There was only one thinning in the stand, between 1970 and 1980. From the frequency of individuals in each diametric class, it was observed the condition of stagnation and competition with cohort in the beginning of class distribution. With the application of the probability density function of Weibull-3P, Trorey model, and the 5th polynomial by diameter class, it was possible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest Management; National Forest; Diameter distribution Engenharia Florestal; Manejo florestal Manejo florestal; Floresta Nacional; Distribuição diamétrica. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/764 |
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| Santos, Andreia Taborda dos; Mattos, Patricia Povoa de; Braz, Evaldo Muñoz; Rosot, Nelson Carlos. |
| Conhecer o volume de madeira de uma floresta é de extrema relevância. Equações de volume para espécies da Floresta Ombrófila Mista se restringem quase que exclusivamente a araucária. Equações de volume para imbuia Ocotea porosa (Nees & Mart.) Barroso são inexistentes. O presente trabalho tem por objetivo desenvolver equação de volume e relação hipsométrica para árvore individual de Ocotea porosa na região de Rio Negro, PR. Foram derrubadas 12 árvores, com DAP entre 3,98 cm e 43,13 cm e altura entre 5,1 m e 20,4 m. Foi feita cubagem rigorosa de cada uma das árvores. Para desenvolvimento da equação de volume, foram testados onze modelos matemáticos. Os critérios utilizados para a seleção da melhor equação foram o coeficiente de determinação ajustado, o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manejo florestal Floresta; Ombrófila Mista; Equação de volume Forest management; Araucaria Forest; Volume equation. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/327 |
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| Curto, Rafaella De Angeli; Mattos, Patricia Póvoa de; Braz, Evaldo Muñoz; Netto, Sylvio Pellico; Zachow, Randolf. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality of wood; Radial and longitudinal variations; Competition Engenharia florestal; Tecnologia da madeira Qualidade da madeira; Variações radial e longitudinal; Competição. |
| Ano: 2016 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/963 |
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| Thaines, Fabio; Braz, Evaldo Muñoz; Mattos, Patricia Povoa de; Thaines, Andreia Aparecida Ribeiro. |
| To quantify the stock of commercial timber in forests demands efficient methods, making possible to estimate efficiently and accurately the present and future timber volume. The aim of this work was to adjust the mathematical models used to estimate timber volume, allowing the determination of the timber potential of a region with greater accuracy and lower cost. The study was conducted at Lábrea, State of Amazonas, Brazil in an area of 6,000 ha, inserted in the Project Forest Management Seringal Iracema II. The forest is predominantly dense with emergent trees, also with the occurrence of open forest with bamboo and palms. For the process of adjusting the models to estimate the volume of commercial timber, 141 trees of commercial species were cubed by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volume equations; Tropical forest; Forest management. Equações de volume; Manejo florestal; Floresta tropical. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/155 |
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