Effect of mannanase-supplemented PKE-based diets on the growth performance, feed efficiency and dressing percentage of broilers

A feeding trial was conducted to determine the effects of mannanase supplementation and various levels of palm kernel expeller (PKE)-based diets on the growth performance, feed intake and feed efficiency of Cobb broilers. The birds were fed 0, 8, 16 and 24% PKE-based diets with or without mannanase supplementation. The study involved a total of 160 one-day-old male Cobb chicks randomly assigned to eight treatments with four replicates each and five birds per replicate. There were no significant differences (p 0.05) in feed intake, weight gain, feed conversion ratio and dressing weight percentage when comparing birds fed with PKE supplemented with or without enzyme with birds fed with corn-soybean diet (control). This study showed that PKE inclusion levels up to 24% did not result in any adverse effect on broiler production. Supplementation of PKE-based diets with mannanase had no beneficial effect on growth performance and feed efficiency