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The present study was carried out to study the effect of Spirulina supplementation on the growth and some physiological performances of the Gimmizah males exposed to heat stress (HS). A total number of 150 male 4 weeks old Gimmizah were randomly allocated in five groups (3 replicates, 10 chicks each). The first (positive control, PC) was reared under 22-24OC and PH 45-55% and fed unsupplied basal diet, B). Whereas, the other groups were reused under HS (38°C±1; 55-65 % RH) for three successive days /wk from 11.00 a.m until 15.00 p.m, through the experimental period (4 to 14 wks of age) in a battery brooders. The first HS group was used as a negative control (NC) and fed B. The 3rd and 4rd groups fed B plus 250 and 150 mg Spirulina /kg diet, respectively. The 5 group was fed the B plus 75 mg VE /kg diet. The feed consumption was significantly decreased for all groups under HS compared with PC group, while FCR for the groups under HS (supplied with Spirulina or VE) were significantly improved compared with NC. The differential of leukocytic count for the NC group recorded the significant increase on Lymphocyte, Heterophil and the ratio of H/L compared with other groups. The concentration of globulin and activity of GSH-PX were significantly improved for the groups supplied with both levels of Spirolina under HS compared with the NC group. The highest Infections Bronchitis titer was recorded for the group supplied with VE and PC group. In conclusion, addition of 150 and 250 mg Spirulina platensis /kg diet improved performance, immunity and can be decreased the adverse effect of heat stress for Gimmizah mail during growing period (4-14 wks of age).

A total number of one hundred weanling New Zealand White rabbits aged five weeks were used in this study. Rabbits were randomly distributed into ten experimental treatments; each one contains 5 males and 5 females in individual cages. Five levels (0, 5, 10, 15 and 20 %) of wheat screening by-product (WSP) and each level was fed without or with addition of enzyme preparation in 5×2 factorial design arrangement. Enzyme preparation ( containing β-Xylanase and α-Amylase) was added at 0 and 500 g/ ton of diets, during the experimental period from 5 to 12 weeks of age.The obtained results could be summarized as follows: The rabbits fed diet containing 5% WSP with enzymes significantly recorded the highest values of body weight, body weight gain and relative growth rate followed by those fed diet containing 10% WSP with enzyme addition. The rabbits fed diet containing 20% WSP without enzymes recorded the lowest significant values in these respects. The rabbits fed diet containing 20% WSP with enzymes consumed the highest amount of feed compared with those for other groups. The best feed conversion ratio was recorded for rabbits fed diet containing 5% WSP with enzymes additions followed by those for control, 10 and 15% WSP with enzymes addition compared with all other dietary treatments. Enzymes supplementation in diets containing WSP significantly improved the digestibility coefficients of nutrients and carcass traits of rabbits compared with other groups. Total protein, cholesterol and urea were significantly decreased by increasing the level of WSP in the experimental diets. However, the differences between rabbits fed diets containing different levels of WSP with or without enzymes addition and the control diet in albumin and globulin was not significant. Rabbits fed diets containing different levels of WSP and provided with enzymes recorded significantly the lowest values of cholesterol compared with those fed the diets containing WSP without enzymes and control diet. 106 ABAZA AND OMARAThe addition of enzymes in diets containing WSP significantly improved the liver functions. Chemical composition of meat did not significantly differ with the WSP and enzymes addition. Results showed an improvement in average values of net revenue, economical efficiency and relative economical efficiency due to feeding growing rabbits on diet containing 5% WSP with enzyme preparation.In conclusion, use of the WSP can be successfully fed at level 5 % of growing rabbit diets with enzymes supplementation (β-xylanase; αamylase) without any adverse effect on growth performance and economical efficiency, under Egyptian conditions.