Use este identificador para citar ou linkar para este item: repositorio.ufla.br/jspui/handle/1/14522
Título: USING THE WEIBULL FUNCTION FOR PROGNOSIS OF YIELD BY DIAMETER CLASS IN Eucalyptus urophylla STANDS
Autor: Miguel, Eder Pereira
Machado, Sebastião do Amaral
Filho, Afonso Figueiredo
Arce, Julio Eduardo
Palavras-chave: Modeling, stand attributes, implicit models
Publicador: CERNE
CERNE
Data: 15-Mai-2015
Outras Identificações : http://www.cerne.ufla.br/site/index.php/CERNE/article/view/170
Descrição: This study aimed to fit the Weibull probability density function to stand data so as to represent the distribution of number of trees by diameter class, and also to fit models representing stand attributes so as to project growth and yield by diameter class and also yield of multiple wood products at the relevant rotation age (7 years). Data were collected from Eucalyptus urophylla stands owned by Anglo Americana plc (CODEMIM), a company situated in the municipality of Niquelândia, Goiás state. Initially a 3P-Weibull probability function was fitted by the percentile method for the aggregate stand. Then models were fitted and selected of stand attributes using residuals plot, residual standard error (syx) and coefficient of determination (R²) as selection criteria. The hypsometric model of Trorey was then used to derive the average height of possible diameter classes, and the taper model of degree 5 and volumetric model of Takata were used to check compatibility of generated volumes. Prognosticated results were consistent with local productivity when compared to previous inventories complied by the same company of stands within the same age group.
Idioma: por
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