Supplementation Of Xylanase Enzyme In Broiler Diet With Varying Energy Levels

The present research was conducted with the objective to investigate the supplementation of xylanase enzyme in broiler diet with varying energy levels. The trial was conducted for a period of 42 days. For the purpose of study, One hundred and eighty commercial, unsexed, straight run, day old Vencobb-400 broiler chicks belonging to same hatch were purchased from commercial hatchery. On arrival, chicks were (Dr. C. R. Jangde) Associate Dean Nagpur Veterinary College, Nagpur. weighed individually and assigned randomly to six groups thereby six dietary treatments viz.T0 (control), T1, T2, T3, T4, T5 (30birds/treatment). Each treatment group consisted of three replicates containing ten birds each. Out of six experimental groups, group T0 was control group provided with standard broiler diet. The treatment group T1 was provided diet with %5 reduction in energy levels compared to standard diet. Group T2 was fed diet with 10% reduction in energy level than standard diet. Group T3 was fed standard broiler diet supplemented with enzyme xylanase @ 100gm/ton. Group T4 was provided with diet having 5% reduction in energy levels with enzyme Xylanase supplementation @100gm/ton. Group T5 was fed diet with 10% reduction in energy level with supplementation of enzyme xylanase @ 100gm/ton Parameters including growth performance, Nutrient metabolizability, Carcass Characteristics and economics were studied. In the present study, group T5 receiving enzyme supplemented diet with 10% reduction in energy levels showed significant (P<0.01) increase in body weight as well as body weight gain. Similarly feed consumption alongwith FCR was also found to be increased compared to control group. Group T3 recorded significantly lowest value of FCR compared to control. Digestibility of dry matter, crude protein and crude fiber was significantly higher (P<0.05) in enzyme supplemented groups. However digestibility of fat remained unaffected. The values of dressing percent and edible meat percent revealed that enzyme supplemented groups had significantly higher dressing and edible meat percentage compared to unsupplemented groups. The observations indicated that enzyme supplementation tend to decrease weight of abdominal fat irrespective of the energy levels of the diet. Weight of spleen was found to be non significant among different treatments. In the giblet weight, weight heart was found to be significantly different among all treatment groups. Weights of liver were found to be significantly different among all the treatment groups. The liver weights were significantly decreased (P<0.01) by supplementation of enzyme to the low energy diets as well as to control diet compared to the non supplemented groups. The breast meat percentage of the group receiving low energy diet without enzyme supplementation (T1 and T2) were low compared to group receiving standard diet without enzyme supplementation (T0). However, it was noticed that enzyme supplementation helped to increase breast meat percent when supplemented with standard diet as well as low energy diet. The result showed significant reduction (p<0.05) in gizzard weights in groups receiving enzyme supplementation as compared to control group T0 irrespective of the energy levels. From the results of the present study, it can be inferred that, length of intestine was significantly decreased by enzyme supplementation @ 100g/ton to the low energy diets as well as to control diet. When production cost per kg was taken into consideration it was observed that group T1 (Rs 60.09), T2 (Rs. 59.23) and T3 (Rs. 59.98) showed lower production cost per kg of bird compared to control group T0 (Rs 61.12). However, group T4 (Rs.63.62) and T5 (Rs. 63.68) were found to have higher production cost per kg compared to control group. Net profit per kg of bird was found to be decreased in group T2, (Rs. 6.17), T4 (Rs. 4.38) and T5 (Rs. 4.32). However highest net profit was seen in group T3 (Rs. 8.02) followed by group T1 (Rs. 7.91) compared to control and were found to be more profitable than control group. It was found that the net profit / kg body weight was higher with supplementation of enzyme without lowering the energy levels and enzyme supplementation with lower energy levels adversely affects the net profit.