386 Effect of essential oil and exogenous enzyme on feed intake, digestibility and rumen fermentation of finishing cattle fed different roughage sources Academic Article uri icon

abstract

  • Abstract Eight rumen-cannulated Nellore steers (327 30 Kg BW) were used in a 4x4 duplicate Latin square to evaluate the effects of two feed additives (MON - Sodium Monensin 26 mg/kg DM vs. Crina RumistarTM - combination of blend of essential oils - 90 mg/kg DM + exogenous -amylase - 560 mg/kg DM, respectively; DSM Produtos Nutricionais Brasil S.A.) and two roughage sources at 10% of peNDF (CS - corn silage vs SB - sugarcane bagasse, on DM basis). Final diets contained 19.5% CS or 12% SB, corn grain (70.7 and 78.2% for CS and SB diets, respectively), 5.5% soybean meal, 4% mineral-vitamin mixture and 0.3% urea, on DM basis. The experimental periods had 14-d for adaptation and 5-d of collections. Data were analyzed with PROC MIXED of SAS and means compared by Tukey test. No interaction between additives and roughage sources was observed. Animals fed Crina RumistarTM had 0.600 kg increase (P = 0.03) on DM intake and decreased (P = 0.01) apparent crude protein digestibility (CP; 75.3 vs. 77.5%, respectively) compared to MON. Animals fed SB presented greater apparent CP digestibility (77.6 vs 75.2%, respectively; P = 0.003) compared to CS. No difference in apparent NDF digestibility for additives and roughage source was observed. Animals fed Crina RumistarTM had lower acetate concentration (P = 0.01) compared to MON on time 9, 12, 15, 18 and 21 hours. Animals fed CS had higher acetate:propionate (P = 0.03) compared to SB at all collection times24 hours. Ruminal ammonia-nitrogen was lower (P = 0.01) in animals fed Crina RumistarTM compared to MON. To use Crina RumistarTM increased DM intake and decreased ruminal ammonia-nitrogen compared to monensin, suggesting a higher CP by-passing the rumen. Crina RumistarTM increased DM intake without negative impacts on nutrients digestibility, regardless roughage source, thus a higher amount of nutrients reaches the intestine to be absorbed and animal performance can be increased.

published proceedings

  • Journal of Animal Science

author list (cited authors)

  • Toseti, L. B., Goulart, R. S., Gouva, V. N., Acedo, T. S., Vasconcellos, G. S., Beline, M., Netto, A. S., & Silva, S. L.

citation count

  • 0

complete list of authors

  • Toseti, Laura B||Goulart, Rodrigo S||GouvĂȘa, Vinicius N||Acedo, Tiago S||Vasconcellos, Guilherme S||Beline, Mariane||Netto, Arlindo S||Silva, Saulo L

publication date

  • December 2019