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A 56-day trial to evaluate the performance, carcass characteristics and meat physico-chemical properties of broiler birds fed graded inclusion of supplemental ascorbic acid (AA) was undertaken using 270 one-day old Arbor acre broiler chicks. Basal starter and finishers diets (T1) contained 0% AA (control); while diets T2, T3, T4, T5 and T6 were supplemented with 0.1, 0.2, 0.3, 0.4 and 0.5% AA respectively. Performance data indicated similar (p>0.05) daily and total feed intake by birds. Feed conversion ratio (3.04, 2.86, 2.85, 2.74, 2.77and 2.69 for birds on diets T1, T2, T3, T4, T5 and T6 respectively) were also similar (p>0.05). However weight gain and final body weight were significantly higher (p<0.05) for birds on AA supplementation compared with control. Correlation of graded AA inclusion and weight gain of chickens was positive (r=0.50) and significant (p<0.05). Regression of weight gain (kg) on graded AA supplementation indicated (R 2 =0.2531) a minimum of 1.67ppm dietary AA requirement for growth. Abdominal fat, eviscerated weight as well as weight of heart varied significantly (p<0.05). Other carcass characteristics, organ indices and meat physico-chemical indices were not significantly different (p>0.05). Supplemental dietary AA was implicated in growth and improved color of broiler meat in this study.

Performance, carcass characteristics and meat physico-chemical properties of broiler chickens fed graded levels of supplemental ascorbic acid