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	Provedor de dados Anais da ABC (AABC) (1) Scientia Agricola (1) Autor AFFLECK,DAVID L.R. (1) BEHLING,ALEXANDRE (1) BEHLING,MARCOS (1) CORTE,ANA PAULA D. (1) Calegario,Natalino (1) Chaves e Carvalho,Samuel de Pádua (1) Mendonça,Adriano Ribeiro de (1) PÉLLICO NETTO,SYLVIO (1) RODRIGUES,AURÉLIO L. (1) SANQUETTA,CARLOS ROBERTO (1) Silva,Gilson Fernandes da (1) Mais... Palavra-chave Biological consistency (2) Biomass (1) Compatible models (1) Non-linear regression (1) Nonlinear models (1) System of equations (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2017 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Growth and yield models for eucalyptus stands obtained by differential equations Scientia Agricola Mendonça,Adriano Ribeiro de; Calegario,Natalino; Silva,Gilson Fernandes da; Chaves e Carvalho,Samuel de Pádua. ABSTRACT: The main purpose of this study was to assess nonlinear models generated by integrating the basal area growth rate to estimate the growth and yield of forest stands. The database was collected from permanent sample units, in Paraopeba county, in the state of Minas Gerais, Brazil. The stands were represented by Eucalyptus camaldulensis × Eucalyptus urophylla hybrid trees, with 3 × 3 meters of spacing. The data were divided into two groups: fitting and validating databases. Two nonlinear models (Strategy A and Strategy B) were developed using differential equations to estimate the basal area growth and yield of the sample units. The logistic model was fitted to estimate the volumetric yield as a function of age, site index and basal area. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Nonlinear models; Compatible models; Biological consistency. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500364 Critical analyses when modeling tree biomass to ensure additivity of its components Anais da ABC (AABC) BEHLING,ALEXANDRE; PÉLLICO NETTO,SYLVIO; SANQUETTA,CARLOS ROBERTO; CORTE,ANA PAULA D.; AFFLECK,DAVID L.R.; RODRIGUES,AURÉLIO L.; BEHLING,MARCOS. ABSTRACT It is presented the theme additivity of biomass of tree components. To evaluate and discuss this context, experimental information collected in forests of Acacia mearnsii De Wild. was used. Equations for components (stem and crown) and total biomass were fitted by means of two procedures: 1) generalized nonlinear least squares and 2) weighted-nonlinear seemingly unrelated regressions. Analyzing the performance of the estimators, it can be concluded that the two tested procedures are equivalent. On the other hand, this conclusion differs when evaluated the consistency and efficiency of the estimators. Fitting equations for the components and for the total biomass by an independent way is not realistic, because from a biological point of view the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Biological consistency; Non-linear regression; System of equations. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401759 Registros recuperados: 2 Primeira ... 1 ... Última

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