Frações fibrosas da silagem de resíduo de manga com aditivos

Abstract

This study was undertaken with the goal of evaluating the different fibrous fractions of mango residue silage in mixture with different additives at growing levels of addition. The experimental design used was the completely randomized, with three replicates, the treatments being arranged in a 4 x 3 + 1 factorial arrangement, the additives being four (ground ears with husks (GEWH), bean straw (BS), corn cob (CC) and coffee hull (CH)) at three levels of addition (10, 20 and 30%) and a control treatment (ensiled unmixed mango residue). The experimental material was ensiled in PVC silos, fitted with a "Bunsen" type valve, with a capacity of about 3 kg each. All the additives utilized raised the DM contents. The additives BS, CC and CH raised the contents of NDF, ADF and cellulose. As regards hemicellulose contents, only the additive CC promoted increases with the rise of the levels of addition. A similar behavior was observed for the additive BS in relation to lignin. When GEWH was used in different levels of addition the fibrous fractions decreased when compared to the control treatment, but the values obtained did not differ statistically. In a general way, the other additives increased the content of the fibrous fractions as well.