EFECTO DE LA GLUCOAMILASA DE Aspergillus Niger EN LA DIGESTIBILIDAD in vitro DE MAÍZ Y SORGO, Y EN LA PRODUCTIVIDAD DE BORREGOS EFFECTS OF GLUCOAMYLASE FROM Aspergillus Niger ON in vitroDIGESTIBILITY, OF MAIZE AND SORGHUM AND ON LAMB PERFORMANCE

Treatment of sorghum grain with glucoamylase from Aspergillus niger has increased ruminal starch digestion. An in vitro essay was conducted to determine the effects of the dose of glucoamylase on the digestion of maize (Zea mays L.) and sorghum (Sorghum vulgare) (during 63 d) grain dry matter (DM). Another trial was carried out to measure productive variables in lambs fed a diet with 70% sorghum and glucoamylase. The doses for the in vitro trial were 0.0, 0.6, 1.0, 2.0, and 6.0 g enzyme kg−1 grain in two incubations. In vitro digestibility was improved p<0.05) with glucoamylase as the doses increased (maize: 36.9 a