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| Donato, Danilo Barros; Castro, Renato Vinícius Oliveira; Carneiro, Angélica de Cássia Oliveira; Carvalho, Ana Márcia Macedo Ladeira; Pereira, Bárbara Luísa Corradi; Oliveira, Aylson Costa; Barbosa, Conrad Julião. |
| The aim of this study was to compare three alternative methods to determine the moisture content of wood logs with the method recommended by ABNT. The moisture content of the wood was determined in a sawdust sample and with a electric meter capacitive. it was also determined the moisture content of a disk sample using the method recommended by ABNT. Using the regression model, all the methods were statistically similar. It was concluded that the use of alternative methods for determining the moisture content of wood in logs is feasible, to substitute the traditional method, but corrections must be implemented. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative methods; Moisture content; Eucalyptus; Regression Engenharia Florestal; Tecnologia e utilização de produtos florestais Métodos alternativos; Teor de umidade; Eucalipto; Regressão. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/608 |
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| Lustosa Junior, Ilvan Medeiros; Lima, Mirella Basileu de Oliveira; Nascimento, Beatriz Garcia; Meira Junior, Milton Serpa de; Castro, Renato Vinícius Oliveira. |
| Este trabalho consiste na seleção de um modelo de taper para descrever o afilamento de fustes das árvores de um povoamento não desbastado, a fim de ser aplicado em um sistema de otimização de corte das árvores para multiprodutos da madeira. O trabalho foi realizado no município de Martinho Campos, Minas Gerais, tendo com área de estudo um povoamento do híbrido Eucalyptus grandis W. Hill X Eucalyptus urophylla S. T. Blake, implantado em janeiro de 2007. Dentre os modelos de taper ajustados, o modelo de Garay foi o que melhor representou o afilamento dos fustes das árvores quando verificou as estatísticas de precisão e as análises gráficas dos resíduos. Posterior ao ajuste desse modelo obteve-se a seguinte equação para estimativa dos diâmetros ao longo do... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2017 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/2216 |
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| Santos, Rosimeire Cavalcante dos; Carneiro, Angélica de Cássia Oliveira; Castro, Renato Vinícius Oliveira; Pimenta, Alexandre Santos; Castro, Ana Flávia Neves Mendes; Marinho, Itaragil Venâncio; Boas, Mariana Almeida Villas. |
| This study aimed to evaluate the potential use of waste generated by forestry species that occur in semiarid northeastern at Seridó region, Rio Grande do Norte, for the briquettes production, determine the physical and mechanical briquettes properties, and to correlate the wood density with the density after the briquettes production and briquettes density with the compressive strength. Thirty-two trees were collected (eight species with four replications). The wood physical and chemical properties evaluation were held under a completely randomized design. For the variables related to briquette, it was adopted the same design with three replicates for each species, totalizing 24 sampling units. The briquettes produced with jurema-preta wood stood out as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest residues; Briquetting; Renewable energy; Semi-arid Brazilian region Resíduos florestais; Briquetagem; Energia renovável; Região semiárida brasileira. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/292 |
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| Santos, Rosimeire Cavalcante dos; Castro, Renato Vinícius Oliveira; Carneiro, Angélica de Cássia Oliveira; Castro, Ana Flávia Neves Mendes; Pimenta, Alexandre Santos; Pinto, Edna Moura; Marinho, Itaragil Venâncio. |
| The aim of this study was to quantify the stocks in volume, biomass and carbon in wood of a fragment of Caatinga dry forest, in Caicó Municipality, Rio Grande do Norte State, northeastern of Brazil. The inventory and sampling of biological material was carried out for biomass and carbon analysis. Wood density of eight species representing 91% of the importance value (VI) of the fragment was determined to convert timber volume into biomass. The percentage of carbon in these species was determined by wood elemental analysis. The carbon stock was calculated based on that carbon percentage multiplied by biomass of each tree. For those species that have not been examined (9% of VI) it was used average basic density () and carbon (), weighted by importance value... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seridó region; Forest inventory; Brazilian natural vegetation Recursos Florestais; Engenharia Florestal; Mensuração Florestal Região do Seridó; Inventário florestal; Vegetações naturais brasileiras. |
| Ano: 2016 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/772 |
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| Castro, Renato Vinícius Oliveira; Bruzinga, Josiane Silva; Mota, Fabrícia Conceição Menez; Azevedo, Glauce Tais Oliveira Souza; Azevedo, Gileno Brito de; Leite, Helio Garcia; Silva, Antonilmar Araujo Lopes da. |
| This study evaluated the prognosis of the diameter distribution of forest stands of Eucalyptus spp., Using the Weibull probability density function, with two and three parameters and two systems of equations for forest prognosis (Systems I and II), the System I made by a larger number of stand variables. We used data of 791 permanent plots measured at ages 25-122 months. The two-parameter function was fitted by maximum likelihood methods and linear approach and the three parameters only by the maximum likelihood method. The quality of the settings of the Weibull function was assessed using the Kolmogorov-Smirnov test (α = 0.01). To adjust the equation systems have randomly selected 551 plots and to validate the data, the 240 remaining installments. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Função de densidade de probabilidade; Métodos de ajuste; Modelagem da produção florestal.. |
| Ano: 2017 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15035 |
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