Effect of Different Levels of Phytase in Laying Hen Diets on Some Biochemical Blood Parameters

The present study was carried out to evaluate the effect of adding two levels of enzymes (0 and 0.8 kg / ton diet) such as phytase (0.3 kg/ ton) and glucanase (0.5kg/ ton) and substitute barley by corn in laying diet with the levels of 0, 25 and 50% as a replace of corn on some physiological responses. A total number (288) of males and females Anshass layer chicks, five weeks old were used in this study (72 of males and 216 of females). Chicks were randomly distributed into 6 groups. Each group contains 4 replicates of 12 males and 36 females, each. The experiment was lasted at 20 weeks of age. The data reviled that, Adding enzyme supplementation to layer diets contain different levels of barley had no significant effect (P≥0.05) on total protein, total albumin, globulin, glucose, GOT, GPT and total lipids. While, it could be noticed that birds fed dietary enzyme recorded a slightly decreased (P≥0.05) in total protein, total albumin, and glucose compared with others fed un-supplemented diet. However, layers fed dietary enzyme recorded a slightly enhancement in total globulin compared with other fed control diet. Moreover,, Layers fed 25% dietary barley with enzyme addition recorded a slightly improvement (P≥0.05) in GOT values, though, this enhancement was noticed in GPT values for birds fed control diet with enzyme.