Consumo, digestibilidade dos nutrientes, produção e composição do leite de vacas alimentadas com resíduo de cervejaria fermentado

Abstract

The objective this work was to evaluate the inclusion of 0, 5, 10 and 15% of the fermented brewer’s grain (FBG) in diets of dairy cows on intake and total digestibility coefficient (DC) of nutrients, production and milk quality. Twenty-eight Holstein cows were used, with 100 ± 21 days in milk, and average body weight (BW) of 612 ± 110 kg, fed with corn silage, ryegrass silage, FBG and concentrate. Intake data and nutrient’s DC, production and milk quality were subjected to regression analysis to 5% of probability. The DM intake of animals was ad libitum. The FBG inclusion levels in diets did not influence (p > 0.05) nutrient intake. The DC of organic matter (OM), total carbohydrates (TCH), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were not influenced by levels of FBG (p > 0.05); however, the DC of DM, crude protein (CP) and ether extract (EE) increased linearly (p 0.05) nutrient intake and production and quality of milk. Thus the FBG can be included until 15% in dairy cow diets without changing nutrient intake and production and quality of milk.