EFFECT OF EXOGENOUS ENZYMES ON THE UTILISATION OF TWO VARIETIES OF SORGHUM (Sorghum bicolor) BY BROILER CHICKENS

EFFECT OF EXOGENOUS ENZYMES ON THE UTILISATION OF TWO VARIETIES OF SORGHUM (Sorghum bicolor) BY BROILER CHICKENS

Abstract:

Two feeding trials were carried out to determine the effect of exogenous enzyme inclusion in sorghum (Sorghum bicolor) based diets for broiler chickens. The first feeding trial was conducted to determine the effect of feeding broiler chickens with two varieties of sorghum namely, Jandawa (Red sorghum) and Kaura (Samsorg 17) with or without phytase inclusion using five (5) Treatment 1 was maize based diet; Treatment 2, Jandawa based diet; Treatment 3, Kaura based diet; Treatment 4, Jandawa based diet with phytase; and Treatment 5, Kaura based diet with phytase. The second trial was conducted with five (5) diets to evaluate the response of broiler chickens fed Kaura based diets supplemented with Ronozyme® phytase, Ronozyme® protease and Roxazyme® G2 G and a combination of protease and G2 G. Treatment 1 was maize based diet; Treatment 2, Kaura based diet with phytase; Treatment 3, Kaura based diet with protease; Treatment 4, Kaura based diet with G2 G; and Treatment 5, Kaura based diet with a combination of Ronozyme® protease and Roxazyme® G2 G. Three hundred and seventy-five (375) broiler chicks were used in each trial and each allotted in a completely randomized design (CRD) to five (5) dietary treatments replicated thrice and having (twenty-five) 25 chicks per replicate. Diets were formulated to meet standard requirements. Water and the various treatment diets were offered to the birds ad libitum for the period of each experiment. Data were subjected to Analysis of Variance (ANOVA) and significant differences among treatment means were compared using the Duncan Multiple Range Test. In the first trial, the starter phase showed that chicks fed Kaura with phytase inclusion had significantly (P < 0.05) higher final body weight and weight gain. Finisher broiler chickens showed no significant (P > 0.05) differences in the final body weight, weight gain, feed intake and feed to gain ratio across all treatments. Feed cost/Kg gain for the eight (8) weeks period showed that birds fed Kaura with phytase had significantly (P < 0.05) lower cost of production. The dressing percentage was significantly (P < 0.05) highest for birds fed Kaura diets (T3 and T5). Diets with phytase inclusion had significantly (P < 0.05) higher tibia calcium and phosphorus contents. There were no significant (P > 0.05) difference in blood calcium and phosphorus. Results of the second trial showed that chicks fed Kaura with protease and G2 G inclusion had significantly (P<0.05) highest final body weight and weight gain. Feed/gain ratio, feed cost and feed cost/Kg gain were not significantly (P > 0.05) different. Finisher broiler chickens showed significant (P<0.05) differences in the final body weight. Kaura diet with phytase had significantly lower final body weight and dressing percentage than all the other treatments. Parameters measured for blood quality were not significantly (P > 0.05) different for all the treatments. It is concluded that phytase in Kaura based diets significantly improved growth performance of broiler chicks, enhanced bone mineralization and significantly reduced cost of production than Jandawa and maize based diets, also Roxazyme® G2 G and the combination with Protease in Kaura based diets improved growth performance for broiler starter chicks and also resulted into comparable performance with maize based diets for broiler finisher. Blood quality was not compromised. The Kaura variety of sorghum with Ronozyme® phytase, Ronozyme® protease combined with Roxazyme® G2 G inclusion can be used for effective nutrient utilization and improved growth performance by broiler chickens.

EFFECT OF EXOGENOUS ENZYMES ON THE UTILISATION OF TWO VARIETIES OF SORGHUM (Sorghum bicolor) BY BROILER CHICKENS