The experimentwas carried out to evaluate the performance of high produce animals fed rationswith different sources of forage, what resulted in the treatment: fresh sugarcane(SC), sugarcane silage inoculated with L. buchneri (SCS), corn silage (CS) andmixture of fresh sugarcane and corn silage (SCCS). The experiment was carriedout in a 4×4 latin square design with periods of 21 days, and the last7 days, of each period was used for sample collections. Besides the performanceevaluation, chemical analyses of forages, rations and orts were performed andanalyses of milk composition and aerobic stability of forages and rations werealso made. There was differences for DM intake, which was higher for SCS (23.5kg/day) and SCSM (23.5 kg/day). All rations provided to the animals high milkproduction (24.4-25.5 kg/day), which did not differ among the animals. The milkcomposition varied only as for fat content, which was higher in the animalsfed CS (36.1%) and in the SCCS (34.8%). The aerobic stability results showedpositive effect of the bacterial aditivation in SCS, which presented the highestaerobic stability among the forages (13.63 hours). The ration with CS as sourceof forage presented the worst stability, which could explain the lower intakeby the animals in this treatment. The SCS is a technical viable alternativeto the use of fresh plant and both can proportionate high milk production, aslong as, the rations are properly balanced. The inoculation with L. buchnerishowed capable to bring benefits for nutritional value and fermentative losses.
