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Effects of myristic acid, pure and encapsulated benzoic acid on performance, organ weight and gut pH in broilers under a high stocking density

2022 CPRF,Nutrition
A high stocking density poses stress on broilers, and it has negative impacts on the growth performance and health of birds. Benzoic acid and myristic acid have been reported to improve growth performance and gut functions in broilers. This study aims to evaluate the effects of dietary myristic acid, pure benzoic acid, and encapsulated benzoic acid supplementation on the growth performance, organic weight, fecal score, and gut pH of broiler chickens under a high stock density. A total of 960 1-day-old mixed-sex Ross 308 broiler chickens (BW: 43.52 ± 2.56 g) were randomly allotted to 5 treatments (6 replicates with 32 broilers in each): 1) basal diets (NC); 2) basal diets with 30 mg/kg of avilamycin (PC); 3) basal diets with myristic acid (500, 400, and 300 mg/kg of Gutmyria in the starter, grower, and finisher, respectively) (MA); 4) basal diets with 1000 mg/kg of pure benzoic acid (PBA); and 5) basal diets with encapsulated benzoic acid (330, 330, and 300 mg/kg of Benzocal-50 in the starter, grower, and finisher, respectively) (EBA). There was a lower FCR in the PC group when compared to the NC group (P < 0.05). However, the ADG, ADFI, and FCR were not significantly different in the MA, PBA, and EBA groups when compared to the NC group (P > 0.05). The mortality rates tended to be lower in the MA and EBA groups when compared to the NC group (P > 0.05). No significant differences were observed in the European Production Efficiency Factor (EPEF) and European Broiler Index (EBI) values among the groups (P > 0.05). Compared with the NC group, the fecal scores were significantly lower in the MA and EBA groups (P < 0.05). There was no significant difference in the relative organ weight among the groups (P > 0.05). The gut pH values of the grower and finisher chickens were lower in the MA, PBA, and EBA groups than in the NC group (P < 0.05). In conclusion, the supplementation of myristic acid, pure benzoic acid, and encapsulated benzoic acid could bring beneficial effects on birds under a high stock density and be used as an alternative to antibiotics.
Tags :
benzoic acid,broilers,stocking density
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University of Manitoba

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