Data/hora: 09/06/2024 18:36:07

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 24/11/1997
Data da última atualização: | 03/10/2016
Autoria: | ABATE, A. L.; MAYER, M.
Título: | Prediction of the useful energy in tropical feeds from proximate composition and in vivo derived energetic contents. 1. Metabolisable energy.
Ano de publicação: | 1997
Fonte/Imprenta: | Small Ruminant Research, v. 25, n. 1, p. 51-59, 1997.
DOI: | 10.1016/S0921-4488(96)00959-5
Idioma: | Inglês
Conteúdo: | Abstract: Multiple regression models were used to predict ME from the proximate composition of 345 tropical forages and 37 concentrates. Metabolisable energy was derived from published digestibility experiments with sheep and cattle. Linear, quadratic and cubic terms of the proximate components were used in the regression analyses. Predictors were derived under the conditions of maximum coefficient of determination (R2) and practicality. On the basis of both criteria, the following predictors were selected: (a) forages: ME (MJ kg-1 DM) = 8.11 + 0.1341CP ? 0.1065ASH; R2 = 0.21, P < 0.0001; ME (MJ kg-1 DM) = 20.27 - 0.1431CF ? 0.1110NFE ? 0.2200ASH; R2 = 0.25, P < 0.0001; (b) concentrates: ME (MJ kg-1 DM) = 5.34 - 0.1365CF + 0.6926NFE - 0.0152NFE2 + 0.0001NFE3; R2 = 0.45, P < 0.0001; ME (MJ kg-1 DM) = - 4.80 + 0.6004CF - 0.0640CF2 + 0.0015CF3 + 1.1572NFE - 0.0236NFE2 + 0.00014NFE3; R2 = 0.54, P < 0.0001. Correlation coefficients were of the order of 0.5 when predicted ME values were validated against known ME values for different forages in eastern and southern Africa. It was concluded that the predictors developed were simple and practical and could be used with an 80% accuracy to predict the metabolisable energy value of tropical forages and concentrates allowing for 1.4 MJ ME deviation from the me
Palavras-Chave: | Energia metabolisavel.
Thesagro: | Composição Química; Forragem; Ovino.
Categoria do assunto: | --
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (3940-1) - ADD - AP - -- -  -  - 1997.00000 - DIS