Muhammad SHOAIB, Shaukat Ali BHATTI, Haq NAWAZ, Muhammad SAIF-UR-REHMAN

Effect of lipase and bile acids on growth performance, nutrient digestibility, and meat quality in broilers on energy-diluted diets

Abstract: The objective of this study was to evaluate the effect of bile acid and lipase alone and in combination form on growth performance and meat quality parameter of broilers reared on low-energy diet. Five hundred and twenty day-old broiler birds were divided into eight treatments with 5 replicates of 13 birds each to evaluate the effects of lipase alone and its combination with bile acids as emulsifier in broilers reared on 75 and 150 kcal/kg reduced-energy diets. Eight diets—PC (positive control), NC1 (negative control 1), NC1L (NC1 + lipase at 0.015%), NC1LB (NC1 + lipase at 0.015% + bile acids at 0.05%), NC2 (negative control 2), NC2L (NC2 + lipase at 0.015%), NC2LB (NC2 + lipase at 0.015% + bile acids at 0.05%), and NC2 (2LB) (NC2 + 2x (lipase at 0.03% + bile acids at 0.1%))—were formulated. Weight gain was higher (P < 0.05) in birds of the NC1L and NC1BL groups and it was lower (P < 0.05) in birds of the NC2 and NC2L groups. Protein efficiency ratio, European production efficiency factors, and feed conversion ratio were better (P < 0.05) in birds of the NC1L, NC1LB, and NC2 (2BL) groups and poor in birds of the NC2 group, whereas feed intake was not affected (P > 0.05) by dietary treatments. Dressing percentages and water holding capacity were higher (P < 0.05) and cooking loss was lower (P < 0.05) in birds of the NC1BL group, whereas lower (P < 0.05) dressing percentage and water holding capacity and higher (P < 0.05) cooking loss were recorded in birds of the NC2 group. Birds of the PC and NC1BL groups had higher (P < 0.05) crude protein and ether extract digestibility, while lower (P < 0.05) digestibilities of ether extract and crude protein were recorded in the NC2 groups. In conclusion, addition of lipase alone or combined with bile acids as emulsifier improved growth performance, nutrient digestibility, and meat quality in broilers reared on 75 kcal reduced energy diet.Key words: Lipase, bile acids, energy-diluted diet, growth performance, meat quality, serum biochemistry

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