Effect of feeding high fibre-low energy diet with and without enzyme supplementation to broiler chicken

The response of feeding soybean and sunflower meal based high crude fibre low energy diets with and without enzyme supplementation was evaluated on performance of broilers. Isoproteinic diets were prepared with three crude fibre levels viz. 5% (CF1) 7% (CF2) and 9% (CF3) containing 0, 20 and 40% dethulled solvent extracted SFC respectively. Each CF diet was supplemented with three levels of enzyme mixture as E0 (without enzyme), E1 (25 g/100kg) and E2 (50 g/100kg) in 3 x 3 factorial design experiment. Enzyme preparation containing cellulses 300000 IU, â-glucanases 2,50,000 IU, xylanases 300000 IU, pectinases 200000 IU, lipases 1,40000 IU and amylases 75,000 IU in per kg. All diets having adequate constant lysine and methionine levels. The result shown significantly (P<0.05) higher body weight, feed intake (FI) and total meat yield (TMY) is 7% CF diet (20% SFC) compared to 5 and 9% CF (40% SFC) diets. Increasing CF in ration had significantly inferior feed conversion ratio (FCR) but had decrease feed cost/kg wt. gain. Supplementation of enzyme (E1 and E2) significantly improved b. wt, FI, TMY and decreased digesta viscosity. Cost of feed/kg live wt. gain was significantly lower in E1 enzyme level. Sixth week body wt. in CF2 x E2 was superior (1484.0g±25.7) and had numerically lower feed cost/kg live wt. gain. Body wt. in CF2 x E, (1467.8 g±22.2) and CF3 x E2 (1465.0 g±25.7) were non significant to CF2 X E2 and these three were significantly high than all other interaction combinations. Interaction effect were also observed significant for digesta viscosity, FI and TMY. The study concluded that 7% CF diet containing 20% dehulled SFC was beneficial in improving body weight, TMY and feed cost/kg live weight gain in broilers.