Effect of Different Levels of Guar Meal (Germ Fraction) and β-Mananaze Enzyme on Broilers Performance

This experiment was carried out to determine the effect of different levels of guar meal (Germ fraction) and B-Mananase enzyme on growth performance of broiler chickens in a six week period using three hundred sixty one-day old broiler chicks (ROSS 308) on a randomized complete design experiment with six treatment groups consisiting of 4 replications and 15 chicks per pen in cage condition. Experimental groups included: 1-Control(without guar meal), 2-low levels(2,4,6% in Starter, Grower and Finisher diets respectly) of guar meal (GL), 3-medium levels(4,6,8 % in Starter, Grower and Finisher diets respectly) of guar meal(GM), 4-medium levels of guar meal+β-Mannanase enzyme (GMb), 5-high levels(6,9,12 % in Starter, Grower and Finisher diets respectly) of guar meal (GH), 6-high levels of guar meal + β – Mannanase enzyme (GHb). Body weight, feed intake (FI) and feed conversion ratio (FCR) were measured weekly. In the end of the period one case from each experimental replication was selected and killed for carcass dressing. Body weight gain, FI, FCR were affected by experimental groups (p<0/05). Experimental treatments had no significant effects on relative weight of carcass and relative weight of giblets except for abdominal fat (p>0/05). Use of high levels of guar meal in broilers diet deleteriously affected growth performance, FI, FCR. Results indicated that optimal levels of guar meal are low level without β -Mananase and medium level with β -Mananase without adverse effects on growth performance of broiler chikens.