Haematology, Carcass and Fatty Acid Composition of Finishing Broilers Fed Enzyme Supplemented Expeller Copra Meal in Corn-Animal Protein Diets
Devi, ADiarra, S. SMael, S. H
This study analyzes the effect of different levels of expeller copra meal (ECM) in animal protein-based diets with enzyme on the haematology, carcass and fatty acid composition of broilers. One hundred and sixty 20 days old Cobb broilers were assigned 8 different diets, 2 of them being controls and 6 others containing ECM at 150, 300 and 450 g/kg, with or without enzymes. Four replicate cages of 5 birds each were fed the diets in a completely randomized design. Higher white blood cell (WBC) counts were obtained in chickens fed the control and 150 g/kg ECM with enzyme (p 0.05) diets. Meat saturated fatty acids (SFA) content increased on the 150 g/kg diet and later decreased above 300 g/kg without enzyme (p 0.05). Monounsaturated fatty acid (MUFA) content was reduced with the inclusion of increasing ECM levels (p 0.05). No interaction effect on polyunsaturated fatty acids (PUFA) was found. Main effects observed were MUFA and PUFA decrease with the inclusion of ECM in the diet (p 0.05). Saturated fatty acid (SFA) content was found to increase on the 150 g ECM/kg diet and later to reduce with increasing ECM levels (p 0.05). Enzyme supplementation reduced SFA and MUFA content (p 0.05) but had no effect on PUFA (p>0.05). In conclusion, inclusion of ECM up to 300 g/kg in corn-animal protein diets has no adverse effects on most broiler haematological variables, but meat fatty acid composition may be altered. More research into basal diet composition, enzyme source and concentration is recommended.(AU)
Texto completo