Efeitos de aditivos microbianos na qualidade da silagem de grão de milho (Zea mays) reidratado com diferentes teores de umidade

Abstract

The objective of this work was to evaluate the effect of adding a microbial additive on the quality of rehydrated corn grain silage with different moisture levels. The design used was completely randomized in a 3x2 factorial scheme, with three moisture levels (28, 35 and 42%) and the inclusion or not of a microbial additive, with five replications. It was found that for dry matter (DM) there was a significant difference (p<0.05) between the moisture contents evaluated, with the treatment with 28% moisture showing the highest accumulation of DM during desilage. There was a treatment effect for total digestible nutrients (TDN), with the 28 and 42% moisture contents presenting lower values (p<0.05) than the 35% treatment, but without a significant difference between them (p >0.05). The greatest loss of tributaries occurred in the treatment with 42% moisture, with 57.39 ± 13.36 kg/ton of natural matter. The pH of silages from different treatments varied between 3.47 ± 0.11 and 4.56 ± 0.35, with the majority of treatments falling within the acceptable variation range for good quality silages. Addition of additive did not cause expected interaction with pH and loss of gases. Crude protein (CP) levels did not show any interaction with moisture or additives.