Efeito do uso de diferentes inoculantes microbianos à fresco e liofilizados sobre a silagem de sorgo

Abstract

In the conservation of animal feed, the microbial inoculants are used in pursuit of improving the standard fermentation of silages, by encouraging the population development of the beneficial microorganisms in this process conservative, as the bacteria that produce lactic acid, rather than using inhibition of undesirable microorganisms such as yeasts and clostridia. The proposed study evaluated the effect of using different microbial inoculants to using fresh and freeze-dried sorghum [Sorghum bicolor (L.) Moench], as raw material for silage, to indicate the possibility of using microbial inoculants developed in the Brazil country. Were conducted two experiments in the same silo, Experiment 1 (treatment with freeze-dried inoculants in the upper region of the silo) and Experiment 2 (treatment with inoculants to cool in the lower silo), with five treatments and three replicates per silo the treatments being characterized as a control (without inoculum), commercial inoculant (IC) and the different inoculants made from lactic acid bacteria isolated from the sorghum plant: Lactobacillus plantarum, Lactobacillus paracasei and Lactobacillus rhamnosus. When silage were used three experimental silos of wood, which were opened at different periods, 1, 3 and 28 days after ensiling. We used the experimental design in split plot in time, in which the three periods were open on plots and subplots the five treatments in a completely randomized design. In experiment 1, the levels of neutral detergent fiber (NDF) and acid detergent fiber (ADF) had the effect of microbial inoculants on the 3rd and 28th day of opening the silos, getting lower values in treatments IC and LPP (L. plantarum + L. paracasei. In experiment 2, NDF, had an effect on the 28th day of opening of the silo, showing that the IC and LPP treatments differed significantly, being statistically equal to others. The combination of freeze-dried microbial isolates of L. plantarum and L. paracasei showed potential for practical use because it was so effective as treatment failure.