Efeito de xilanase e glucanase sobre a digestibilidade de dietas contendo coproduto de etanol de milho para suínos

Abstract

There is a growing movement towards the destination of corn for ethanol production. Thus, there are indications that the corn produced in the state of MT will have other purposes. The production of ethanol from corn consists essentially of fermenting the starch and sugar components present in the grain, converting them into ethanol. In this way, the starch present in the grain is converted into ethanol, while the other nutrients present in the grain are concentrated in a co-product called Dry Distillery Grains with Soluble (DDGS). The characteristics of the co-product depend on the quality of the grain used, processing conditions. This product has high potential for use in feeding pigs due to its high protein concentration. However, DDGS concentrates the entire fibrous fraction (cellulose, hemicellulose and pectin) of the corn grain, a fraction with limited digestion capacity for pigs. The fiber added to the pig diet compromises the digestibility of the other nutrients in the diet. Therefore, the use of xylanase and β-glucanase added to pig diets has received great importance recently. Such enzymes are added to the diets in order to increase the digestibility of nutrients that are difficult to digest and / or that the animals are unable to digest due to enzyme production limitations. Among the enzymes available on the market, non-starch polysaccharide degrading enzymes (carbohydrases) have aroused interest for use in pig diets containing co-products with a high fiber content. One of the main limitations for the use of DDGS in diets for pigs in high inclusions refers to its high fiber content, which in addition to not being digested by the animal, compromises the digestibility of other nutrients in the diet. With this, the objective of a literature review on the use of corn DDGS and xylanase and glucanase in diets containing corn ethanol co- product for pigs.