Effect of dried fermentation biomass from l-lysine hcl and monosodium l-glutamate production on growth performance and small intestinal morphology of broiler chickens

Dried fermentation biomass (DFB) is a co-product of crystalline amino acid production. An experiment was conducted to determine the effect of two different sources of DFB (Lys-DFB: fermentation biomass from L-lysine HCl production and MSG-DFB: fermentation biomass from monosodium L-glutamate production) on growth performance and small intestinal morphology of broilers. Seven hundred, day-old Cobb 500 broilers were randomly allotted to 7 dietary treatments using a randomized complete block design with 10 replicates per treatment. Phase 1 (d 0 to 10) and phase 2 diets (d 11 to 24) with increasing levels (0, 1, 2 and 3%) of Lys-DFB and MSG-DFB were formulated followed by a common phase 3 diet (d 24 to 35). From d 0 to 24 and the overall period, including Lys-DFB to the diet did not affect growth performance but MSG-DFB resulted in a reduction (linear, P <0.03) in ADG and BW and poorer (linear, P <0.01) F/G. No significant differences in small intestinal morphology were observed among the treatments; however, MSG-DFB resulted in increased (quadratic, P =0.04) incidence of pasty vents. In conclusion, DFB from either L-Lys HCl or monosodium L-glutamate production does not improve growth performance and small intestinal morphology when added to broiler diets.