THE EFFECT OF TREATING COASTAL BERMUDAGRASS PELLETS WITH SODIUM HYDROXIDE AND MONENSIN ON FORAGE UTILIZATION AND GROWTH OF BEEF CALVES
Coastal bermudagrass forage was harvested, treated with sodium hydroxide (NaOH) and (or) monensin, processed into pellets and fed to growing calves. Calves fed bermudagrass pellets that contained monensin gained 12.7% faster (P < 0.05), consumed 1.6% less feed per day (P > 0.05) and required 12.3% less feed per unit of gain (P < 0.05) than control animals. Calves fed NaOH-treated bermudagrass pellets gained 6.1% faster (P > 0.05), consumed 6.4% less feed per day (P < 0.05) and required 11.5% less feed per unit of gain (P > 0.05) than control animals. Treating the forage with the combination of NaOH and monensin resulted in rates of gain similar to the control and NaOH treatment but 17.5% less (P < 0.05) than animals fed monensin-treated forage. Feed intake and feed utilization values for calves fed the NaOH plus monensin-treated forage were intermediate to those obtained with the two treatments used separately. The addition of monensin to dehydrated bermudagrass pellets did not affect (P > 0.05) the apparent digestibility of the forage. The addition of NaOH to the forage meal before pelleting increased the digestibility of the fibrous fractions of the bermudagrass. Treating the forage with a combination of NaOH and monensin before pelleting resulted in digestibility values similar to those obtained from the NaOH treatment without monensin. Key words: Bermudagrass pellets, sodium hydroxide, monensin, forage utilization