Abstract
= 0.65 and e p = 1.69. Based on the chemical composition data and correlations, it was possible to establish prediction equations for the values of digestible and metabolizable energy of soybean meal for pigs, being necessary validation for greater accuracy of the models.
Highlights
The energy content of any feedstuff comprises the results of the oxidation of nutrients during animal metabolism
Considering the low variation of soybean meal, values for the digestible and metabolizable energy of the samples had a coefficient of variation below 3% (Table 2)
The variability found for the level of ether extract in the soybean meal is due to the efficiency of the oilextraction process (OST et al, 2005; RIEGER et al, 2008), and may contribute to the variation found in the values of digestible and metabolizable energy
Summary
The energy content of any feedstuff comprises the results of the oxidation of nutrients during animal metabolism. The efficiency of the method for formulating the diet is dependent on the accuracy with which the energy of the feed is determined (SILVA et al, 2003). Biological trials aimed at analysing the digestibility and metabolizability of the nutrients and energy of any feed or ingredient, are shown to have a high degree of reliability, but they are costly and time-consuming. Indirect methods, such as determination of the energy values of feeds by means of prediction equations, are low-cost alternatives when applied to specific feedstuffs (NOBLET; PEREZ, 1993)
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