Effects of cottonseed meal supplemented with lysine and enzyme (Hydroenzyme XP) on egg quality and performance of laying hens

This study was conducted to evaluate the effect of cottonseed meal supplemented with lysine and enzyme on laying hens performance and egg quality. Eighty Hy-Line W-36 white Leghorns were allotted for 12 weeks in a 2 × 2 factorial experiment in a completely randomized design, including four treatments and five replications with four birds in each. Treatments included: basal diet + 1% lysine + 0% enzyme; basal diet + 1% lysine + 0.025% enzyme; basal diet + 2% lysine + 0% enzyme; and basal diet + 2% lysine + 0.025% enzyme. Protein content in the magnum tissue was not significantly affected by different levels of lysine and enzyme, although magnum Protein:RNA ratio increased with 2% of lysine as compared with 1%. Moreover, jejunum DNA's concentration was not significantly affected by lysine. Similarly, jejunum RNA:DNA ratio increased with 2% of lysine. Performance specificity significantly improved with 2% lysine and 0.025% enzyme. Diets supplemented with 2% lysine and 0.025% enzyme can improve performance, increase magnum protein synthesis and jejunum cell efficiency.