| Revista: | Revista Brasileira de Zootecnia |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000444350 |
| ISSN: | 1516-3598 |
| Autores: | Cunha, Camila Soares1 Marcondes, Marcos Inácio1 Silva, Alex Lopes da2 Gionbelli, Tathyane Ramalho Santos1 Novaes, Marco Aurélio Schiavo1 Knupp, Leonardo Sidney3 Virginio-Junior, Gercino Ferreira4 Veloso, Cristina Mattos1 |
| Instituciones: | 1Universidade Federal de Vicosa, Departamento de Zootecnia, Vicosa, Minas Gerais. Brasil 2Universidade Federal Rural do Rio de Janeiro, Departamento de Producao Animal, Seropedica, Rio de Janeiro. Brasil 3Universidade Federal de Lavras, Departamento de Zootecnia, Lavras, Minas Gerais. Brasil 4Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil |
| Año: | 2019 |
| Volumen: | 48 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | This research was conducted to investigate the effect of live and inactive sugarcane yeast on beef cattle voluntary intake, apparent digestibility of nutrients, ruminal pH, volatile fatty acids (VFA) concentrations, and ruminal ammonia. Five rumen-cannulated Nellore heifers were distributed in a 5×5 Latin square design, with five experimental periods of 15 days, with seven days for adaptation to the additives and the remaining days for data records and sampling. Total mixed ration (TMR) was composed by corn silage (20%) and concentrate (80%) based on corn and soybean meal. Five treatments were evaluated: without additive use (negative control; NC); chemical buffer addition – 0.71% in concentrate DM of sodium bicarbonate and 0.18% of magnesium oxide (positive control, PC); 10 g/day live yeast (LY); 15 g/day of inactive yeast (IY15); and 30 g/day of inactive yeast (IY30). Sugarcane yeasts were directly infused in rumen immediately after morning and afternoon feed supply. Feed additives did not affect voluntary intake, nutrient digestibility, and sorting behavior of animals. However, heifers from all treatments presented preferential intake of fibrous fraction of diet, especially those from NC and IY15. Nitrogen balance, VFA concentrations, and blood parameters were not influenced as well. Sodium bicarbonate and magnesium oxide led to greater ruminal pH than yeast, and IY15 presented greater pH than IY30. Ruminal ammonia was increased by the use of additives. Active and inactive yeasts are not recommended as feed additives for bovines fed diets with 80% of concentrate since it allows animals to select fibrous particles from TMR, and no representative gain in ruminal parameters and digestibilities are guaranteed |
| Disciplinas: | Medicina veterinaria y zootecnia |
| Palabras clave: | Bovinos, Nutrición animal, Levaduras, Rumen, Novillas, Nelore, Digestibilidad, pH, Amonio, Acidos grasos volátiles |
| Keyword: | Bovines, Animal nutrition, Yeasts, Rumen, Nellore, Heifers, Digestibility, Ammonia, Volatile fatty acids |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
