Silagens na forma de ração total a base de capim-elefante com adição de coprodutos da agroindústria

Abstract

The use of agroindustrial residues has been widely used nowadays, for being a low-cost alternative for animal feed. In this sense, the objective was to evaluate the fermentative profile and losses in silage of complete feed silages containing elephant grass (Pennisetum purpureum Schum.) and agroindustry coproducts. The experiment was conducted, at Campus II, CCA/UFPB, Areia - PB. The experiment was performed in a completely randomized design with six repetitions per treatment, totaling 30 experimental units. Pineapple, passion fruit peel and sisal mucilage were used as agro-industrial residues, in addition to refazil, corn bran, soybean meal and cotton cake. Elephant grass constituted the bulk of the diet. The ingredients were processed in a stationary silage machine, being mixed and ensiled according to the treatments, as follows: T1: elephant grass + cottonseed cake + refinazil; T2: elephant grass + cottonseed cake + refinazil + pineapple crop remains; T3: elephant grass + cottonseed cake + refinazil + passion fruit husk; T4: elephant grass + cottonseed cake + refinazil + sisal mucilage; T5: elephant grass + corn meal + soybean meal. The silos remained closed for 68 days. The data were subjected to analysis of variance and Tukey's test, both at 5% probability. The dry matter content of the silages ranged from 32 to 44%. The pH of the silages containing pineapple, sisal mucilage and corn and soybean meal presented values greater than 4.5. The silages that showed lower losses of dry matter, gases and effluents were those containing cottonseed cake and refinazil, with addition of pineapple plant remains and with corn and soybean meal, with no significant difference between them. The treatments containing cottonseed cake and refinazil, also with the addition of pineapple residue, and containing corn bran and soybean bran, showed results closer to a well-fermented silage.