Abstract #612
Section: Ruminant Nutrition
Session: Ruminant Nutrition: Manipulating rumen function
Format: Oral
Day/Time: Tuesday 4:15 PM–4:30 PM
Location: Panzacola H-2
Session: Ruminant Nutrition: Manipulating rumen function
Format: Oral
Day/Time: Tuesday 4:15 PM–4:30 PM
Location: Panzacola H-2
# 612
Effects of essential oils and exogenous enzymes for finishing Nellore cattle in feedlot.
Murillo Alves Porto Meschiatti1, Lucas Agostinho Pellarin1, João Ricardo Rebouças Dórea2, Tiago Sabella Acedo2, Luis Fernando Tamassia2, Cristina Simões Cortinhas2, Flávio Augusto Portela Santos*1, 1University of São Paulo, Piracicaba, SP, Brazil, 2DSM Produtos Nutricionais Brasil SA, São Paulo, SP, Brazil.
Key Words: additive, beef, feedlot
Effects of essential oils and exogenous enzymes for finishing Nellore cattle in feedlot.
Murillo Alves Porto Meschiatti1, Lucas Agostinho Pellarin1, João Ricardo Rebouças Dórea2, Tiago Sabella Acedo2, Luis Fernando Tamassia2, Cristina Simões Cortinhas2, Flávio Augusto Portela Santos*1, 1University of São Paulo, Piracicaba, SP, Brazil, 2DSM Produtos Nutricionais Brasil SA, São Paulo, SP, Brazil.
The objective with this experiment was to evaluate the combination of essential oils and exogenous enzymes on performance of Nellore bulls finished in feedlot. Three hundred Nellore bulls (initial BW = 330 ± 33 kg) were fed during a total period of 90 d with diets containing 82.5% corn, 8.5% sugarcane bagasse, 5% soybean meal, 3% mineral, 1% urea and were randomly allocated to 50 pens. Animals were blocked based on initial BW. The treatments were MON (Monensin, Tortuga – 26 mg/kg DM), CRINA (Essential Oils: Crina Ruminants, DSM – 90 mg/kg DM), CRINA+MON (90 and 26 mg/kg DM, respectively), CRINA+RUM (CRINA + α-amylase: Ronozyme RumiStar, DSM – 90 and 560 mg/kg DM, respectively) and CRINA+RUM+P (CRINA+RUM+Protease: Ronozyme Proact, DSM – 90; 560 and 840 mg/kg DM, respectively). Response variables included: dry matter intake (DMI), average daily gain (ADG), feed efficiency (ADG/DMI), final body weight (final BW), hot carcass weight (HCW) and dressing. The data were analyzed using PROC MIXED of SAS and means were compared by Tukey test considering the block as random effect and treatments as fixed effects. The DMI, ADG, final BW, HCW were greater for CRINA+RUM in comparison with MON, CRINA+MON and CRINA+RUM+P (Table 1). Cattle fed CRINA+RUM had improvements 9.4% in DMI, 12.2% in ADG, 3.7% in final BW and 4,6% HCW compared with cattle fed MON diets. In conclusion, Nellore bulls fed diets containing amylase and essential oils were slaughtered heavier than bulls fed monensin diets.
Table 1. Combination of essential oils and exogenous enzymes on feedlot performance of finishing Nellore bulls
| Item | MON | CRINA | CRINA+ | CRINA+ | CRINA+ | P-value | SEM |
| Initial BW, kg | 330.8 | 330.8 | 330.9 | 330.6 | 330.7 | 0.5422 | 10.9 |
| Final BW, kg | 476.4b | 486.5ab | 474.1b | 494.1a | 463.1c | 0.0001 | 12.6 |
| DMI, kg/d | 8.64bc | 9.24ab | 8.50c | 9.45a | 8.44c | 0.0001 | 0.27 |
| ADG, kg/d | 1.615b | 1.722ab | 1.584b | 1.812a | 1.465c | 0.0001 | 0.06 |
| FE, G:F | 0.187ab | 0.187ab | 0.188ab | 0.193a | 0.175b | 0.0001 | 0.005 |
| HCW, kg | 264.8b | 272.5ab | 262.3b | 277.0a | 257.4c | 0.0002 | 8.01 |
| Dressing, % | 55.5 | 56.0 | 55.5 | 56.1 | 55.8 | 0.2652 | 0.25 |
Key Words: additive, beef, feedlot
