Data/hora: 10/06/2024 16:04:12

Provedor de dados: | 124
País: | Brazil
Título: | Univariate and multivariate nonlinear models in productive traits of the sunn hemp
Autores: | Bem,Cláudia Marques de; Cargnelutti Filho,Alberto; Carini,Fernanda; Pezzini,Rafael Vieira.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Crotalaria juncea L.; Multivariate analysis; Fresh mass; Growth modeling.
Resumo: | ABSTRACT Multivariate analysis helps to understand the relationships between dependent variables; this methodology has great potential in several areas of knowledge. The aim of this study was to adjust and compare the univariate and multivariate Gompertz and Logistic nonlinear models to describe the productive traits of sunn hemp (Crotalaria juncea L.). Two uniformity trials were performed, and the following productive traits were analyzed in 376 sunn hemp plants along 94 days of observations (four plants per day): the fresh mass of leaves (FML), the fresh mass of stem (FMS), and the fresh mass of the aerial parts (FMAP). The Gompertz and Logistic univariate models were adjusted for each productive trait. To adjust the multivariate models, the errors covariance matrix was calculated. The matrix (Cholesky factor) was obtained for each trait, and the multivariate Gompertz (GG) and Logistic (LL) nonlinear models were generated, together with the combination of both models (GL and LG). To define the best model, the residual standard deviation (RSD), the determination coefficient (R2), the Akaike information criterion (AIC), the mean absolute deviation (MAD), and the measures of intrinsic nonlinearity (INL) and parametric nonlinearity (PNL) were calculated. The nonlinear multivariate model LL was adequate and achieved satisfactory results to describe the productive traits of sunn hemp.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100418
Editor: | Universidade Federal do Ceará
Relação: | 10.5935/1806-6690.20200018
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.51 n.1 2020
Fonte: | info:eu-repo/semantics/openAccess