Additive and Non-additive Biomass Equations for Black Wattle
Equações de Biomassa Aditivas e não Aditivas para Acácia Negra
Alexandre Behling; Sylvio Péllico Netto; Carlos Roberto Sanquetta; Ana Paula Dalla Corte; Augusto Arlindo Simon; Aurélio Lourenço Rodrigues; Braulio Otomar Caron
Abstract
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Resumo
RESUMO: Os objetivos desse trabalho foram propor equações aditivas de biomassa dos componentes (fuste e copa) com a biomassa total para a espécie acácia negra (Acacia mearnsii De Wild.) e demonstrar a inconsistência de equações de biomassa ajustadas independentemente. Dois procedimentos foram utilizados para ajustar equações não lineares de biomassa: i) independente e ii) sistemas de equações. O segundo procedimento, definido pela aplicação do modelo de regressão aparentemente não relacionada, apresenta melhores propriedades biológicas e estatísticas para estimar equações alométricas de biomassa dos componentes e biomassa total, quando comparado com a estimação independente. Uma propriedade efetiva desse procedimento é a aditividade, isto é, as estimativas de biomassa dos componentes são compatíveis com as de biomassa total. As equações ajustadas independentes não consideram a dependência entre os componentes de biomassa, assim, além das estimativas não serem aditivas, propriedade indesejável, resultarão em estimativas com maior variância.
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References
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