Composição e parâmetros fermentativos da silagem da parte aérea da mandioca com adição de casca e raiz

Abstract

The objective of this experiment was to evaluate the composition and the fermentative effects of aerial part silage of cassava with inclusion of root or bark of cassava on losses of gases and effluent, the pH, the concentration of NH3-N and the chemical composition of silages the aerial part of cassava. We used a completely randomized design with four levels of cassava (0, 3, 6, 9 or 12% inclusion of bark or root), each with four replicates. The addition of cassava peel caused a linear increase in the losses of gases and linear reduction in effluent losses. The dry matter (DM) content increased while crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) decreased linearly with the addition of cassava peel. The pH remained at levels desirable for a good fermentation, with averages of 4.12 and 4.07 for treatments with the addition of bark or cassava root respectively. The N-NH3 had results below the desired minimum, 7.84 and 7.69% with the addition of bark or root of cassava respectively, and the addition of a linear decrease root. The effluent and gases losses for both silages with the inclusion of root or bark of cassava were minimal, being these byproducts of agriculture, an alternative to animal feed.