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Título : Dominant height model for site classification of Eucalyptus grandis incorporating climatic variables
Autor: Scolforo, José Roberto Soares
Maestri, Romualdo
Ferraz Filho, Antonio Carlos
Mello, José Márcio de
Oliveira, Antônio Donizette de
Assis, Adriana Leandra de
Palavras-chave: Eucalyptus grandis - Climatic variables
Eucalyptus grandis - Height
Florestas - Variações climáticas
Publicador: Hindawi Publishing Corporation
Data da publicação: 2013
Referência: SCOLFORO, J. R. S. et al. Dominant height model for site classification of Eucalyptus grandis incorporating climatic variables. International Journal of Forestry Research, [S. l.], v. 2013, article ID 139236, p. 1-7, 2013. doi: 10.1155/2013/139236
Abstract: This study tested the effects of inserting climatic variables in Eucalyptus grandis as covariables of a dominant height model, which for site index classification is usually related to age alone. Dominant height values ranging from 1 to 12 years of age located in the Southeast region of Brazil were used, as well as data from 19 automatic meteorological stations from the area. The ChapmanRichards model was chosen to represent dominant height as a function of age. To include the environmental variables a modifier was included in the asymptote of the model. The asymptote was chosen since this parameter is responsible for the maximum value which the dominant height can reach. Of the four environmental variables most responsible for database variation, the two with the highest correlation to the mean annual increment in dominant height (mean monthly precipitation and temperature) were selected to compose the asymptote modifier. Model validation showed a gain in precision of 33% (reduction of the standard error of estimate) when climatic variables were inserted in the model. Possible applications of the method include the estimation of site capacity in regions lacking any planting history, as well as updating forest inventory data based on past climate regimes.
Idioma: pt_BR
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