Equações de predição de valores energéticos de alimentos obtidas utilizando meta-análise e componentes principais

• Autor(a) principal: Mariano, Flávia Cristina Martins Queiroz
• Data de Publicação: 2012
• Outros Autores: Lima, Renato Ribeiro de, Rodrigues, Paulo Borges, Alvarenga, Renata Ribeiro, Nascimento, Germano Augusto Jerônimo do
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/42665
• topic: Composição química; Energia metabolizável; Validação de equações; Chemical composition; Metabolizable energy; Validation of equations

The purpose of this study was to develop a meta-analysis study by using the principal components analysis to obtain homogeneous groups of experimental results. In the process of the meta-analysis, it was considered data from 293 experiments carried out in Brazil. Prediction equations were obtained to estimate the nitrogen-corrected apparent metabolizable energy (AMEn) of poultry feedstuffs. Data from metabolic trials were used to validate the prediction equations obtained, which were similar than other available equations in the literature. One of the problems in meta-analysis is the determination of the homogeneous groups of experiments and, this problem was eliminated by using principal components, since there was no need to establish variables or factors to be considered in this classification.