Acerola byproducts in broiler chickens diets

Author(s)

Thainá Landim de Barros

• Document type: Master's Dissertation
• Press: Araçatuba. 2017-11-22.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Medicina Veterinária. Araçatuba
• Defense date: 2017-11-07
• Advisor: Elisa Helena Giglio Ponsano

Abstract

Acerola byproducts are a rich source of bioactive compounds with high antioxidant activity. In the present study, productive performance, bacterial caecal population, meat characteristics, biochemical parameters and serum antioxidant status of broilers fed acerola byproduct (ACM) as an alternative ingredient were compared with the same parameters of broilers fed diets with no ACM but with antimicrobial growth promoters (AGP) and synthetic antioxidant (SA). The experimental diets comprised: positive control (PC), containing 0.007% colistin sulfate 8% (AGP) and 0.01% butylated hydroxytoluene (BHT) (SA) and no ACM; negative control (NC), without AGP, AS or ACM; diet with 5% ACM (AC 5%); and diet with 7.5% ACM (AC 7.5%). One hundred sixty one day old Cobb 500 male chicks were vaccinated with Livacox T via ocular and randomly distributed into 16 pens. Four repetitions were performed, with ten birds per pen. used in the experiment. Productive parameters were measured weekly until day 42, when the broilers were slaughtered and the meat, the blood and the caecal contents were collected for the analyses of oxidative rancidity and color of the meat, serum oxidant/antioxidant status and caecal bacterial population counts. There were no differences among the treatments regarding to feed intake, body weight gain and feed conversion, as well as to dressing percent and live weight. Only ACM at 5% caused an increase in the caecal lactic bacteria count. Breast color and thigh lipid rancicity did not differ among the groups. Groups fed ACM had higher serum albumin and total protein, although there were no differences in globulin and albumin:globulin ratio among the experimental diets, as well as to serum concentration of AST, ALT, GGT, creatinine and uric acid. Total cholesterol was lower in the animals fed ACM, with no differences to PC. Groups PC, ACM 5% and ACM 7.5% had higher serum antioxidant activity but similar oxidant activity and lipid oxidation. It was concluded that the addition of ACM into broilers diets improved the birds antioxidant status without harming their performance and health and maintaining the caecal microflora and the meat characteristics. The use of acerola byproduct as an alternative ingredient in broilers feeding may reach the demand for the substitution of AGP and SA in poultry production and still collaborates to sustainability (AU)

• FAPESP's process: 15/19448-7 - Agroindustrial residues for the raising of broilers
• Grantee: Thainá Landim de Barros
• Support Opportunities: Scholarships in Brazil - Master