Effects of Barley Cultivar and Dietary Supplemental enzyme on Performance, Egg Quality Traits, and Selected Blood Parameters of Laying Hens

The effect of supplementing two commercial multienzymes to diets included two barley cultivars (Sararood [71.99%] and Valfajr [66.39%]) on performance, egg quality, and blood parameters of laying hens was investigated in an 8-wk (65 to 73 wk of age) experiment. The commercial multienzymes were Grindazym™ (with mainly β-glucanase and xylanase activity) and Hemicell® (with mainly β-mannanase activity). Each dietary treatment consisted of five replicates of six hens. Barley cultivar had no significant effect on the measured criteria and there was no interaction between barley cultivar and enzyme throughout the study. Diet supplementation with enzymes reduced feed intake (P