Valoración de energía digestible de la glicerina cruda proveniente de aceite de palma -<i>Elaeis guineensis</i>- para cerdos en crecimiento en función del nivel de almidón de maíz en la dieta

Abstract

To determine the apparent digestible energy (EDA) of crude glycerin (GC) from palm oil (Elaeis guineensis) in pigs two experiments (E) were performed. In E1, EDA was determined to GC, with the technique of mobile nylon bag (TBMN) using eight barrows with duodenal cannula. In E2, EDA, EMA to GC was determined by the conventional method with indicator (MCI) with 10 barrows placed in metabolic cages. In E1 and E2 were evaluated in 2 x 5 factorial arrangement, two levels of corn starch (NA) in the diet, 10 (NA10) and 12% (NA12), and five levels of replacement by GC, 0; 2.5; 5; 7.5 and 10%, in E1 as a completely randomized design and in E2 as a Latin square design. For MCI and TBMN, data were analyzed using multiple linear regression and nitrogen metabolism in MCI as a Latin square design using the GLM and REG modules of SAS. By TBMN there was no effect (P> 0.05) in the NA on the EDA of GC. EDA of GC was calculated at 3251 kcal / kg DM. EDA of GC in the MCI depended NA (P <0.001), estimated at 4427.3 and 3769.3 Kcal / kg MS for NA10 and NA12, respectively. Interaction (P <0.001) between NA and GC for the amount of digestible nitrogen was observed, was reduced when GC increased by NA12 and increased by NA10. Other nitrogen metabolism parameters were not affected (P> 0.05). The results of EDA corrected by NA with MCI showed high correlation (R2 = 0.82) with TBMN. By MCI was established that increased in NA reduced the EDA of GC.