133 Effects of Benzoic Acid and Sodium Benzoate Supplementation on Growth Performance of Nursery Pigs

Abstract This study was to investigate the effects of dietary supplementation benzoic acid and sodium benzoate on growth performance nursery pigs. A total 432 pigs (6.9 ± 0.9 kg BW) were assigned 8 treatments (6 pigs/pen, n = 9) in a randomized complete block design with initial BW as fed for 41 d 3 phases (7/17/17 d, respectively). Treatments 1) basal diet (BD), 2) BD + antibiotic, 3) 0.30% benzoate, 4) 0.40% 5) 0.60% 6) 0.25% acid, 7) 0.35% 8) 0.50% acid. Diets contained nutrients meeting requirement. Growth fecal score measured each phase. Pigs representing pen euthanized collect stomach intestinal digesta measure pH, urine pH hippuric content. Data analyzed using contrasts Proc MIXED slope ratio GLM SAS. Increasing supplemental showed quadratic response (P < 0.05, max at 339 g/d) ADG linear increase 514 578 ADFI. tended have 0.094, 323 g/d), but no difference Urine linearly decreased 7.5 5.7) increasing not affected by benzoate. both increased 0.05) content (3.0 10.4 3.0 9.2 g/L, With slope-ratio assay dependent variables intake an independent variable, estimates bioavailability acids different between sources. In conclusion, without differences efficacy