Efficacy of bacterial phytase, citric acid and their combination in broiler fed inorganic phosphorus free diet

Present study was conducted to assess the efficacy of Escherichia Coli derived phytase alone or with citric acid (CA) given inorganic phosphorus (P) free broiler diet. Ninety six one-day old COBB-500 male broilers were divided into four groups and fed one following diets for a period 35 days: positive control (PC) diet formulated based on NRC (1994) recommendations, negative (NC) (inorganic P diet; containing 0.20% lower than that in PC diet), two other by adding only (500 FTU/kg feed) CA feed 2 % CA) NC Growth performance, serum minerals concentration, tibia shank characteristics, nutrient retention measured. Impaired growth performance (final BW, BW gain, FCR) (NC group) restored addition Best FCR (1.83) recorded added group worst (2.03), however, further did not show any significant variation. Lowest concentration (mg/dl), (%) ameliorated (P<0.05) phytase, restoration magnitude non-significantly greater group. Retention total comparable diet, although former contained level available later one. Addition increased this numerically. Broilers deficient P, showed relative recommended Therefore, relying may be viable ensure sufficient supply diets.
 Bangladesh Journal Animal Science 51 (3): 107-114, 2022