Inclusión de afrecho de maíz duro en la alimentación de vacas holtein mestizas de la Estación Experimental Tunshi

Abstract

ABSTRACT In the experimental station Tunshi, Bovine milk producers program of the Faculty of Animal Science - ESPOCH, located in the parish Licto, of Cantón Riobamba, in the Province of Chimborazo, the effect of two levels of corn bran was assessed: 12,5% and 25% compared to an untreated corn bran, on the productive performance of 24 crossbred Holstein lactating cows, the same that was provided at the time of milking as a supplementary part of the daily diet plus a diet of forage, being AM1, fodder (alfalfa, kikuyo) 89,75%, concentrate (with corn bran), 10,25%; AM2 forage (alfalfa, kikuyo) 89,75%, concentrate (with corn bran), 10,25% compared to a control treatment (AMO%), giving a total of three experimental treatments with 8 repetitions each, distributed under a desing Block Completely randomized. This investigation established that the use of corn bran, statistically, did not affect the final weights and milk production, nevertheless the best results were obtained with treatment (AM 12,5%), reaching a final weight of 619,13 kg, a total consumption of 17,50 kg MS/day and milk production of 1925,36 liters/lactation, beating other treatments. Furthermore, highly significant differences were also established on the total calcium intake (70,77g/day), phosphorus (36,18g/day) and protein (2821,66g/day). with a profitability of 24%; so it is recommended to use 12,5% of corn bran in the diet, the better production and economic results were obtained.