“Determinación del valor nutritivo del subproducto del destilado de maíz (Zea maíz) y cebada (Hordeum vulgaris) incluido en la suplementación parcial del sobrealimento en bovinos de leche”

Abstract

The by-product of the ethanol production process is called distiller's grain (DG). When this by-product contains 65 to 70 % water and contains unfermented distilled grain particles it is called Wet Distilled Grains (WG). This investigation sought to evaluate the nutritional value of the distillate by-product, applied in partial supplementation of the overfeed in dairy cattle. Nine Holstein (3) and F1 (6) cows were used as experimental units. They were fed based on three treatments T1 (100 % balanced and grass), T2 (30 % GDH, 70 % balanced and grass) and T3 (50 % GDH, 50 % balanced and grass), 3 experimental units were designated at random for each treatment. Statistically, a significant difference in the variables of protein and lactose was evidenced. The results show that the best treatment in terms of total protein parameters (3,43 %), total solids (13,04 %), and non-fat solids (9,10 %) was T3, while T2 obtained the best percentage of Fat T2 (4,11 %) and T1 obtained the best percentage of lactose (4,89 %), as for the milk production variable the best treatment was T2 with on average of 17,84 L of milk per day. Therefore, the study justifies the use of GDH as a partial supplement when the percentages not to exceed the 30 % of the food ration.