Abstract
Two experiments were conducted to evaluate the inclusion of biscuit waste in broiler diets. Performance was measured as growth rate and feed efficiency when 10, 25, 50, 75 and 100% of maize in a control diet was replaced by the by-product and fed to broilers for 12 weeks. Substitution for maize at 100% level significantly (P<0.05) affected performance although he cost of feed/kg live weight gain was N1.41 compared with ₦1.82 for the control diet. Ikletabolizable energy and nitrogen retention was not affected by dietary treatment but fat retention was significantly higher (P< 0.05) at 75 and 100% substitution. The carcass weights expressed as percentage of liveweights were not significantly affected but abdominal fat deposition was higher of the high levels of inclusion of biscuit waste. When maize was completely eliminated from the diet, bulking with 5, 7.5 or 10% maize cob as additional fibre source increased feed intake but inclusion beyond 5% level did not improve feed efficiency. Fat and nitrogen retention and abdominal fat deposited significantly (P • 0.05) decreased at 7.5 and 10% maize cob inclusion but gizzard weight increased.
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