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Broiler Performance and Carcass Traits as Affected by Dietary Liquid Saccharopolyspora Solubles Concentrate

D. J. Fidler^*, B. George, C. L. Quarles and M. T. Kidd

^* Abbott Laboratories, North Chicago, Illinois 60064-6312
Colorado Quality Research, Wellington, Colorado 80549
Department of Poultry Science, Mississippi State, University, Mississippi State, Mississippi 39762-9665

Correspondence: M. T. Kidd, E-mail: mkidd{at}poultry.msstate.edu

No research exists evaluating potential dietary interactions of liquid Saccharopolyspora solubles concentrate (SynerMax) and growth-promoting feed additive compounds. Because SynerMax is currently being used by the poultry industry primarily to improve pellet mill operations, studieswere conducted to elucidate possible interactive effects of SynerMax with certain antibiotics (experiment 1) and a probiotic (experiment 2). These experiments utilized rapidly growing broilers of a commercial strain and were carried out in floor pens. The growth-promoting treatments consisted of bacitracin methylene disalicylate (starter and grower diets) and virginiamycin (finisher diet) in experiment 1 and a commercial probiotic in experiment 2. All birds were vaccinated and subsequently challenged with coccidiosis in experiment 2. In experiment 1, the dietary addition of antibiotics decreased (P < 0.05) BW and carcass weight, but birds fed diets containing 0.5% SynerMax had increased (P < 0.05) breast meat yield over birds fed the control diet. In experiment 2, interactions indicated that birds fed the control diet with the probiotic, the 0.5% SynerMax diet with the probiotic, or the 1.0% SynerMax diet without the probiotic had optimal (P < 0.05) BW, corrected feed conversion, carcass weight, and breast meat weight. Dietary SynerMax improved breast meat yield in experiment 1 but not in experiment 2.

Key Words: broiler • liquid Saccharopolyspora solubles concentrate • antibiotic • probiotic • breast yield