PERFIL FERMENTATIVO DA SILAGEM DE CANA-DE- AÇÚCAR COM ADITIVOS MICROBIANOS

Abstract

Silage as a bulky, enables the delivery of quality food for animals throughout the year. The sugarcane has been used for the production of silage because has a high mass productivity per area, however, it may have some undesirable characteristics such as high production of ethanol by the occurrence of alcoholic fermentation. Considering the peculiarities of this forage, the ensiling of sugarcane requires the inclusion of additives, chemical or microbial, in order to control the losses during the fermentation process. Thus, were conducted trials at the Goiano Federal Institute (IFGoiano), to evaluate the fermentative profile and the chemical composition of silage produced with microbial additives: Lactobacillus buchneri, Bacillus subtilis and Propionibacterium acidipropionicci, alone or combined. There were no significant differences regarding the chemical composition of silages receiving additives, however, it can be observed better recovery of dry matter. This can be attributed to inhibition of yeast growth by additives, which are responsible for the alcoholic fermentation and subsequent ethanol production. Furthermore, the additives were effective in ensuring a significant reduction in the pH of silage and alter the contents of volatile fatty acids. We could observe that the combination of L. buchneri and P. acidipropionicci secured a synergistic effect of the benefits inherent in each species. Thus, we proved the beneficial effect of the addition of microbial additives in sugarcane silage in order to ensure the production of a quality food.