Supplementation of Exogenous Bile Acid, Emulsifier, and their Combination Enhance Nutrient Digestibility and Growth Performance Without Negatively Influencing Blood Metabolites of Commercial Broiler Chickens
N, IqbalA, FatimaU, AnwarR, MustafaU, FarooqW, AbbasF, Khalid MA, RehmanM, HussainM, Aziz ur Rahman
The objective of this experiment was to check the effect of supplementation with exogenous bile acid (BA), emulsifier (Em) and their blend on performance parameters, fat utilization, relative organ weights, and blood lipid profile in growing broilers. A total of 800 day-old broiler chicks were procured from a local hatchery and distributed into four experimental treatments in completely randomized design, with ten replicates with twenty birds each. The treatments were: Control (CON) (basal diet without any Em or BA), CON supplemented with 0.03% Em, CON supplemented with 0.025% BA and CON supplemented with a blend of Em (0.03%) and BA (0.025%). Starter (0-7), grower (8-21) and finisher (22-35) diets were offered to birds for 35 days. Body weight gain, feed intake and feed conversion ratio were recorded weekly. On days 21 and 35, nutrient digestibility was assessed using the acid-insoluble ash method. Blood lipid profiles and internal organ weights were measured at the end of the trial. The results of digestibility assays carried out on days 21 and 35 showed that supplementing BA alone, Em alone or their combination increases (p<0.05) body weight gain and improves (p<0.05) feed conversion ratio on days 7 to 21, days 21 to 35, and days 0 to 35. Results also showed that supplementation of BA, Em and their blend in the diet improve dry matter and fat digestibility (p<0.05), while the level of low-density lipoprotein decreased (p<0.05) in blood. Furthermore, the treatments did not influence carcass and organ weight (p>0.05); however, BA, Em and their blend increased the weight of the spleen (p<0.05). In conclusion, BA, Em and their combination enhance growth performance and nutrient digestibility in broilers without negatively affecting lipid metabolism.(AU)
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