Caracterização de produtos da industrialização de arroz para uso em nutrição de ruminantes

Abstract

The objective of this study was to characterize the products of rice industrialization for use in animal nutrition, evaluating the centesimal composition of rice bran, broken rice and rice waste (of cleaning operation), together with the analysis of corn grain. A diet containing approximately 10% of protein was formulated on Nutrismart software (Cargill/Nutron) and subjected to pelletization. The centesimal composition of the mash and pelleted ration were compared, as well as the acidity index, as an indication of whether palletization is sufficient to stabilize rice bran and cease the enzymatic degradation. The results indicate the rice waste is a source of crude fiber (17.35% DM) for ruminant feeding, with expressive protein values (7.71% DM). Rice bran contains high ether extract level (19.05% DM), with significant protein (14.75% DM) and phosphorus (2.27% DM) values. Protein content of broken rice (8.38% DM) is close to that of corn (8.74% DM), differing in the ether extract content (1.28% DM for broken rice and 3.18% DM for corn) and crude fiber (0.20% DM for broken rice and 2.33% DM for corn). Mash and pellet rations showed close centesimal composition values, as expected. Regarding the acidity index, there was no significant difference between the physical forms, indicating that the palletization is not able to stabilize the rice bran.