Formaldehyde protection of syrup off based diets for pigs.Feeding value and nutrient utilization

Julio Ly; L. J. Blanco; J. Castillo; R. Perez

Julio Ly Instituto de Investigaciones Porcinas, La Habana, Cuba
L. J. Blanco Instituto de Investigaciones Porcinas, La Habana, Cuba
J. Castillo Instituto de Investigaciones Porcinas, La Habana, Cuba
R. Perez Instituto de Investigaciones Porcinas, La Habana, Cuba

Palabras clave: Digestibility, energy balance, growth, nitrogen balance, pigs, syrup off

Resumen

Two trials, each involving 12 crossbred (YLD) pigs, were conducted to evaluate diets containing 61.7% syrup off protected or not with formaldehyde (2 mL/kg). The remaining 38.3% of the diet was torula yeast, minerals and vitamins. In trial 1 higher (P<.05) voluntary feed intake and rate of gain were observed in finishing pigs (50-90 kg) fed the protected as opposed to unprotected syrup off stored at ambient temperature. In trial 2, unprotected syrup stored under refrigeration was consumed in slightly greater quantity than the protected material. Digestibility of DM and OM were unaffected (P<.10) by dietary variables and, although formaldehyde protection depressed (P<.05) energy andNdigestibility, there were no differences between treatments in N and energy retention. The protection of syrup off for pig feeding by formaldehyde addition is suggested as a useful option.

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