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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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| Schröder, Thomas; Hofiço, Noé Ananias dos Santos; Zimmermann, Anna Paula Lora; Pereira, Lílian Daniel; Rocha Junior, Dilson Sousa; Meyer, Evandro Alcir; Fleig, Frederico Dimas. |
| Existem basicamente três métodos de estimativa de volume comercial de árvores individuais: uso do fator de forma, modelos de volume e funções de afilamento, os quais apresentam resultados diferentes quanto à precisão de variáveis e devem ser utilizados adequadamente para diferentes finalidades. A comparação entre estes três métodos foi o objetivo desta pesquisa e, para tanto, foram medidas árvores de Eucalyptus grandis provenientes de primeiro desbaste. A utilização de equação de dupla entrada foi o método mais eficiente para a determinação do volume. O uso do fator de forma se mostrou restrito e as funções de afilamento foram eficientes para elaboração de tabelas de sortimento. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Engenharia Florestal; Manejo Florestal Volumetria; Fator de forma; Modelos de volume; Funções de afilamento Volume estimation; Form quotient; Volume equations; Taper functions. |
| Ano: 2013 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/446 |
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| Lopes,Adriano da S.; Folegatti,Marcos V.; Oliveira,Gabriel Q. de; Fanaya Júnior,Eder D.; Belchior,Isabela B.; Brito,Kelvin R. M.. |
| Irrigation management has mostly been performed without criteria and, studies in relation to field-irrigated eucalyptus development are scarce. The aim of this study was to evaluate wood volume equations based on stem (trunk) diameter of two eucalyptus hybrids in initial development, with and without irrigation. The experiment was set up in Aquidauana, State of Mato Grosso do Sul, Brazil, from April, 2011 to March, 2012, with the eucalyptus hybrids, Eucalyptus grandis x Eucalyptus camaldulensis (Grancam) and Eucalyptus urophylla x Eucalyptus grandis (Urograndis). Evaluations were performed during the first year of crop development in which five mathematical models were tested for estimation of wood volume (Berkhout; Koperzik & Gehrhardt;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp; Volume equations; Drip irrigation; Micro-spray irrigation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001000014 |
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