SILAGEM DE MILHO COM CAPIM TAMANI

Abstract

The silage use has been an efficient alternative to supply the roughage lack in the period of precipitation reduction, providing good quality food widely used in the feeding of ruminants. Therefore, the objective of this study was to evaluate the fermentative profile and nutritive value through chemical composition, in vitro dry matter digestibility and protein fractionation of corn silage with Tamani guinea grass (Panicum maximum BRS cv. Tamani). The experiment was carried out at the Goiano Federal Institute, Campus Rio Verde, Goiás, with a completely randomized design and four replications. The treatments consisted of the following silages: corn; corn with 10% Tamani guinea grass; corn with 20% Tamani guinea grass; corn with 30% of Tamani guinea grass and corn with 40% of Tamani guinea grass, totaling 20 experimental silos. The tamani guinea grass addition to silages was carried out based on natural matter. For silage, corn was harvested with 320 g kg-1 of dry matter and tamani guinea grass in the 30-day development cycle with 286.8 g kg-1 of dry matter. After 50 days of silage, the silos were opened, to analyze the fermentative, bromatological characteristics and proteins and carbohydrates fractionation of silages. The results showed that the tamani guinea grass adition to corn silage increased the pH, buffer capacity and reduced the dry matter content and lactic acid concentration, but did not compromise the silages fermentation characteristics, staying within the appropriate standard. The tamani guinea grass addition of 40% level n corn silage provided higher levels of CP, DIVMS and increased the fraction A and B1 as decreased fraction B3 and C of protein, thus being an alternative to improve the corn silage quality. Therefore, mixed silages can be indicated as a for supplementing quality roughage to feed ruminants.