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Growth dynamics of young trees of Araucaria angustifolia and Pinus taeda PFB - Pesquisa Florestal Brasileira
Machado, Sebastião do Amaral; Figura, Marco Aurélio; Silva, Luís César Rodrigues da; Mendes Nascimento, Rodrigo Geroni; Quirino, Sandra Mara dos Santos; Téo, Saulo Jorge.
The objective of this research was to investigate the monthly growth rhythm of young trees of Araucaria angustifolia and Pinus taeda throughout the vegetative year and to establish its correlation with climatic variables. Monthly measurements of diameter and total height were carried out in one stand of A. angustifolia and two of Pinus taeda. Correlation matrices among the current monthly increments and the climatic variables indicated that the development of Pinus taeda is mostly affected by photoperiod and by minimum, average, and maximum temperatures, while A. angustifolia growth is affected mostly by minimum and average temperatures. doi: 10.4336/2010.pfb.30.62.165
Tipo: Info:eu-repo/semantics/article Palavras-chave: Monthly growth; Climatic variables; Correlation matrix; Cluster analysis. Crescimento mensal; Variáveis climáticas; Análise de agrupamento.
Ano: 2010 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/170
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Volumetric modeling for bracatinga (Mimosa scabrella) in bracatinga stands in Curitiba metropolitan region PFB - Pesquisa Florestal Brasileira
Machado, Sebastião do Amaral; Figura, Marco Aurélio; Silva, Luís César Rodrigues da; Téo, Saulo Jorge; Stolle, Lorena; Urbano, Edílson.
The objectives of this research were: to develop equations to estimate the stem and firewood volume of bracatinga (Mimosa scabrella Benth.); to evaluate the accuracy of the estimates having as a  comparator the true volumes obtained by the xylometer method; to  test the validity of Ahrens' (1981) published equation. In bracatinga stands, 384 trees were measured until a minimum diameter of 4 cm at the small end. The validation set was composed by 55 trees measured by the xylometer. The ² (chi-square), aggregated difference test, standard error of estimation, average error and graphical distribution  of the residuals were used on validation process. The best equation obtained for the stem was provided by Schumacher-Hall model. For  firewood, data were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Volume equations validation xylometer. Equações de volume; Validação; Xilômetro..
Ano: 2010 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/59
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