Method of Enzyme Application and Effect on the Performance of Broilers Fed Meal-Based Diet in Ethiopia: Systematic Review

This seminar evaluate the effects of enzyme supplementation on the nutrient digestibility and growth performance of broiler chickens. Enzyme supplementation in broiler diets has gained significant attention in the poultry industry for its potential to improve growth performance, feed efficiency, and overall bird health. Enzymes such as xylanase, phytase, protease, β-glucanase, and mannanase have shown varying degrees of efficacy in enhancing nutrient digestibility and utilization, particularly in cereal-based diets. This review examines the role of enzyme supplementation in broiler nutrition, focusing on its impact on growth performance, feed conversion, and the reduction of anti-nutritional factors in plant-based feed ingredients. Enzyme supplementation improves feed efficiency by reducing the viscosity of non-starch polysaccharides like β-glucans and pentosans found in grains such as wheat, barley, and rye. This reduction in viscosity enhances gut health, nutrient absorption, and overall digestibility. Specific enzyme combinations, such as xylanase and phytase, have shown significant improvements in nutrient digestibility, protein accretion, bone mineralization, and mineral retention, which directly contribute to enhanced growth performance. Future research should focus on the optimization of enzyme combinations, the use of multi-enzyme products, and exploring their long-term effects on broiler health, performance, and meat quality. Enzyme supplementation represents a promising strategy for improving feed efficiency, reducing environmental pollution, and enhancing poultry production, though further studies are required to understand the full range of potential benefits.