Supplementation of phytase and its combination with xylanase, amylase and protease (XAP) on performance and bone mineralization of broiler chicken

Abstract Phytase is the most common enzyme used in broiler diet mainly to improve phosphorus (P) digestibility and reduce P excretion environment, but its effectiveness together with other enzymes such as xylanase, amylase protease (XAP) not widely evaluated. Current study was conducted evaluate efficacy of Buttiauxella spp. phytase supplementation at 1000 FTU/kg alone combination XAP (2000 U/kg 200 4000 protease) on performance bone mineralization. A total 2849 male broilers Lohmann Indian River (LIR) were randomly assigned 7 treatments 11 replications. Treatments positive control (PC) using standard followed LIR recommendation, negative 1 (NC1) nutrient reduction 0.19% units available P, 0.2% calcium (Ca), 0.41% crude protein (CP) 69 kcal/kg AME, NC2 applied similar except for AME which 105 kcal/kg, top NCs and/or supplementation. NC1 significantly (P<0.05) reduced body weight, mortality-corrected feed conversion ratio (McFCR) toe ash percentage compared PC. improved McFCR percentage. Further, numerically showed better weight gain, index (BI). These data suggest effective maintain under deficiency, this because able anti-nutritional effect lead digestibility.