Desempenho de bovinos alimentados com dietas contendo enzimas amilolíticas exógenas

• Autor(a) principal: OLIVEIRA, Leonardo Guimarães de
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/0013000006sp7
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/901
• topic: Amido; Biotecnologia; Confinamento; Nutrição; Ruminantes; Biotechnology; Feedlot; Nutrition; Ruminant; Starch; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL

The use of ionophores as growth promoters in beef cattle is being placed as a barrier by EU countries for beef exports. Faced with this challenge, new products are researched to increase animal performance and some of the products that can be selected for such are the products with enzymatic activity. The present work aims to produce an amylolytic enzyme complex, using the fungus Aspergillus awamorii, and evaluate the performance of confined animals supplemented with this complex and amylolytic enzyme supplementation with a commercial product containing multienzyme complex, yeast, MOS, and bacterial strains. The production, characterization and evaluation of enzyme were performed at the Laboratorio de Enzimologia and Laboratorio de Fisiologia da Digestão of the Instituto de Ciências Biológicas /ICB II, Universidade Federal de of Goiás and the share of experimentation with animals was conducted in a feedlot located in Rondonópolis - MT . The tests performed were: treatment control (basal diet composed of 16% grass silage Mombasa, 66.0% ground corn, 3.0% vitamin and mineral mixture 15% cottonseed meal), UFG treatment (basal diet with the addition of 23.8 ml per animal containing 23.27 saccarificant units per ml of enzyme solution produced in Laboratório de Enzimologia da UFG, resulting in 48.67 sacarificantes units / kg diet) and Biofórmula treatment (basal diet with addition of 5 , 0 grams of enzymatic complex based on exogenous enzymes, produced by Super Premium Tecnologia em Agropecuária Ltda., composed of 10% MOS, 40% inactive yeast, saccarificant 180 units / g, resulting in 83.13 saccarificant units / kg diet). The addition of products with amylolytic activity was not significantly (P <0.05) daily weight gain, intake, feed conversion and carcass yield of feedlot cattle, probably by the amount of the enzyme complex with amylolytic activity used in the diets was not sufficient to promote the breakdown of a number of starch molecules to significantly change the availability of nutrients in the rumen, which is likely to improve the performance of these animals. There was no statistical difference between the IVDMD of the diets of this experiment, which together with consumption data, possibly explains the fact that the animals do not show any statistical difference in weight gain and feed conversion. The percentage of residual fecal starch was not influenced by supplementation with exogenous amylolytic enzymes of UFG and Biofórmula treatments. Since there was no statistical difference in the excretion of starch and IVDMD, this possibly explains the similar performance between treatments. With the data presented in this study we conclude that the extract of the fermentation of the fungus Aspergillus awamorii presents amylolytic action, but the inclusion levels of the enzyme extract and the commercial product containing multienzyme complex, yeast, and bacterial strains MOS in the diet of feedlot cattle were not effective in improving animal performance.