Interação de um blend de taninos e saponinas com níveis de grãos secos de destilaria na dieta de bovinos de corte em confinamento

• Ano de defesa: 2024
• Autor(a) principal: Torquato, Cleber
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Faculdade de Agronomia e Zootecnia (FAAZ); UFMT CUC - Cuiabá; Programa de Pós-Graduação em Ciência Animal
• Palavras-chave em Português: Bovinos de corte; DDG; Aditivos; Confinamento; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA; Beef cattle; Additives; Confinement
• Link de acesso: http://ri.ufmt.br/handle/1/6409

The objective of this study was to evaluate the effects of including levels of DDG (Dried Distillers Grains) combined or not with a blend of tannins and saponins (TS) on consumption, digestibility and ruminal fermentation. The hypothesis is that the inclusion of levels of DDG produced in Brazil can increase the production of Ruminal Ammonia Nitrogen (N-NH3) and the interaction of a TS blend can improve the nutritional characteristics of diets and the parameters of consumption, digestibility and fermentation ruminal. We used 5 Nellore cattle, not castrated and cannulated in the rumen, with an average body weight of 732 ± 45 kg distributed in a 5 x 5 Latin square considering a 2 x 2 + 1 factorial arrangement (two levels of DDG inclusion (20 and 40%), with or without the inclusion of ST and a control treatment). The following treatments were evaluated: DDG0 – diet without the inclusion of DDG; DDG20 - diet with 20% DDG inclusion; DDG40 - diet including 40% DDG; DDG20TS - diet including 20% DDG plus TS (blend of uvacho and chestnut tannins + saponins - Silvafeed® BX); DDG40TS - diet including 40% DDG plus TS. The protein levels of the diets were: 13.54% (DDG0), 14.77% (DDG20 and DDG20TS) and 19.47% (DDG40 and DDG40TS). The total experimental period was 95 days, divided into 5 periods of 19 days each, with 14 days for adaptation of the animals and 5 days for collections. Samples of ingredients, diets and feces were collected to assess nutrient consumption and digestibility. Samples of ruminal content were collected at times: 0, 2, 4 and 6 hours after the first feeding. There was no significant effect (P > 0.05) of TS on the analyzed variables. The intakes of dry matter (DM), organic matter (OM), crude protein (CP) and ether extract (EE) (P > 0.05) were not affected, but there was an increase in the consumption of neutral detergent fiber (NDF) (P = 0.013) and reduction in non-fibrous carbohydrate (NFC) consumption (P = 0.018) for DDG40 when compared to DDG20. There was a reduction in the digestibility of DM and OM (P < 0.05) with the inclusion of DDG in the diets. For the variables pH and ruminal ammonia nitrogen, there was no treatment x time interaction effect (P > 0.05), but there was an effect of time (cubic, P < 0.05) for both variables. Short-chain fatty acid (SCFA) concentrations were not influenced by DDG inclusions (P > 0.05). There was no effect of the inclusion of TS on the evaluated parameters of beef cattle receiving high protein diets. The inclusion of DDG up to the 40% level caused few changes in nutritional characteristics.