Effects of dietary β-mannanase supplementation in low-energy and low-protein diets containing high-mannan ingredients on growth performance, meat quality, intestinal morphology, and liver health in broiler chickens

s: Feeding low-energy and low-protein diets with reduction in 100 kcal/kg AMEn and approximately 1.0% CP impaired broiler performance. Inclusion of 2.5% PKM and 2.5% CM with or without MN supplementation had no considerable effects on broiler performance. However, MN supplementation in low-energy and low-protein diets containing PKM and CM decreased digesta viscosity with improving jejunal morphology.