APPARENT METABOLISABLE ENERGY VALUES OF MAIZE OFFAL AS INFLUENCED BY ENZYMES AND COCKTAILS

Abstract

This study was conducted to quantify the effect of enzymes and cocktail of enzymes on apparent metabolisable energy (AME) value of maize offal to facilitate its inclusion in feed formulation. A completely randomized designed was used in the feeding trial comprising of eight treatments namely
T1 (control), T2 (with xylanase), T3 (with multipurpose), T4 (with phytase), T5 (with cocktail of xylanase and multipurpose), T6 (with cocktail of xylanase and phytase), T7 (with cocktail of multipurpose and phytase) and T8 (with cocktail of xylanase, multipurpose and phytase). Each treatment was replicated thrice with one adult cockerel per replicate. The feeding trial was done using the intubation method. Gross energy values for treatments and feacal samples were determined with calorimeter while apparent metabolisable energy values were calculated. Data obtained were subjected to ANOVA using Statistical Analysis System and treatments‘ means were separated using Duncan Multiple Range Test. Enzymes individually improved the AME value of maize offal compared to the control. The multipurpose enzyme was significantly best (P˂0.05) among the three individual enzymes with AME value of 2952.72 Kcal/Kg while phytase was the least (2535.28 Kcal/Kg).The cocktails were significantly different (P˂0.05) in their effects on AME of maize offal while treatment T8 gave the significantly highest AME (3649.28 Kcal/Kg) among the treatments. However, there was no significant difference (P˃0.05) between treatments T3 and T7.It was concluded that cocktail of enzymes is better than individual enzymes. The AME values obtained are practically useful and have placed enzyme supplemented maize offal as a substitute to conventional energy supplements.