A total number of 270 Japanese quail (180 females and 90 males) at 4 weeks of age were used in an experiment lasted 22 weeks. Experimental japanese quail (Coturnix coturnix japonica), were used in a 3x2 factorial arrangement. Quail were randomly divided into three treatment groups, each of 60 quail females and 30 males, that received three dietary protein levels (16, 18 or 20 % CP). Each quail group was randomly divided into two sub-groups (30 females and 15 males each). The first sub-group of each group received diet without any supplementation, while the second sub-group was given diets supplemented with a mixture of 50 mg Vitamin E (VE) and 1 mg Se selenium (Se) /kg diet. All diets were isocaloric (2900 kcal ME/kg) and isofibrous. Results obtained could be summarized as follows:-Live body weight and body weight change were improved with the medium protein level (18%) followed by high protein (20%) and the low protein level (16%) during the whole experimental period. -Egg weight was significantly (P<0.05) decreased, while egg number increased (P<0.05) with the decrease of protein level. -Feed intake recorded an increase (P< 0.05) with the decrease of protein level.-Feed conversion ratio (g feed intake /g egg mass) revealed significantly worst (P<0.05) decrease by low protein level in diet. -Protein intake recorded an increase with increasing of protein level.-Efficiency of protein utilization was improved with low protein level 16% in the diet.-Hatchability recorded a non-significant difference (P>0.05) among groups.-Albumen % showed a significant (P<0.05) increase, while yolk % decrease with the increase of protein level. -Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were significantly varied (P<0.05) among the different experimental diets, the different levels of protein did not significantly influence digestion coefficient of NFE. -Supplementing diet with VE and Se affected the final live body weight and body weight change were significant (P<0.05) during the experimental period as compared to unsupplemented diets. -Improvement of egg number and egg mass by 10.45 and 15.39 % compared to that of the unsupplemented, respectively. -Feed intake recorded an increase (P<0.05) with the supplemented of VE and Se.-Feed conversion ratio and hatchability percentage improved (P<0.05) with supplemented of VE and Se.-Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were improved as compared to unsupplemented diets. -sThe higher economical efficiency was obtained by using 18% CP with supplemented of VE and Se obtained the best economical efficiency.-Interaction between dietary protein levels, VE and Se supplementation, indicated that supplemented experimental diets with VE and Se resulted enhanced the performance of these diets especially with 18 % CP levels. -It could be concluded that crude protein level of 18 % supplemented with Vitamin E and selenium (50 mg VE and 1 mg Se /kg diet) in the laying Japanese quail diet improve the produ...

A total of 300 unsexed one-day-old Japanese quail chicks (Coturnix coturnix japonica) were used in a 3x2 factorial arrangement. Quail chicks were randomly divided into three treatment groups (100 chicks/ group) that received three dietary protein levels (20, 22 and 24 % CP). Each quail group was randomly divided into two sub-groups (50 chicks each). The first sub-group of each group received diet without any supplementation, while the second sub-group was given diets supplemented with Vitamin E (VE) 200 IU and Selenium (Se) 0.5 mg/kg diet. The experimental diets were formulated isofibrous and isocaloric (2900 kcal ME/kg). The main results obtained could be summarized as follows: -Live body weight and body weight gain were improved with the medium protein level (22%) followed by high protein (24%) and the low protein level (20%) during the whole experimental period. -Feed intake during the whole experimental period recorded significantly (P<0.05) increased with decreasing dietary crude protein level. In contrast, protein intake recorded significantly decrease (P< 0.05) with decreasing CP level. -Feed conversion ratio revealed significantly (P<0.05) improved with medium protein level in the diet. -Efficiency of protein utilization was improved with low protein level 20% in the diet. -Morality rate recorded non-significant difference among experimental groups of protein level. -Dietary protein level had insignificant effect on carcass traits. -Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were significantly varied (P<0.05) among different protein levels. -Economical efficiency percentage recorded higher values with 22% protein level. -Regardless of protein level, results showed that supplementing diet with VE and Se affected of body weight, body weight gain, feed conversion ratio and morality rate were significantly (P<0.05) improved, but feed consumption was significantly increased (P<0.05), while efficiency of protein utilization improved as compared to unsupplemented diets. -Carcass traits were improved clearly when quail fed a diet contain 22 % level of protein supplemented with VE and Se. -Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were significantly improved (P<0.05) with VE and Se as compared to unsupplemented diets. -Economical efficiency percentage recorded the higher values when supplementing diet with VE and Se. -Interaction between dietary protein level, VE and Se supplementation indicated that the presence of supplemented with any level of dietary protein resulted in improvements in the obtained values of live body weight and body weight gain, feed conversion, carcass traits, digestibility trials and economical efficiency comparably with the unsupplemented diets during the experimental period.

A total number of 60 Hy-line W36 hens at 18 weeks of age were used in an experiment lasted 33 weeks were randomly assigned to each of three feeding treatments (20 / treatment). The experiment aimed to study the effect of feeding diets polluted with aluminum on laying hens. The first treatment was fed the basal diet as a control, while the other two treatments were fed basal diet supplemented with 500 or 1000 ppm aluminum (Al) as aluminum chloride (Al.Cl3.6H2O).Results obtained could be summarized as follows: Aluminum (Al) at 500 or 1000 ppm levels recorded decreased in body weight and body weight change at the end of the experimental period.Egg production, egg number and egg mass for hens treated with supplementation of Al recorded decreased during the experimental period.Feed intake differ statistically (P<0.05) among the different feeding groups. Feed conversion ratio recorded a non significant difference between groups.Egg quality expressed as egg yolk percentage were increased (P<0.05), while egg shell, yolk index and Haugh units recorded a non significant difference between groups.Aluminum concentration in egg yolk, albumen and eggshell over those of the control group, while Al concentration lower than that of eggshell.The negative effect of various Al supplement a non significant increase in percentage of liver, spleen and abdominal fats, while gizzard and heart percentage recorded a significant differences (P<0.05) compared to the control group.Aluminum causes significantly (P<0.01) increased Al in muscle and bone, while liver, heart and gizzard were not significant recorded increased as compared to the control group.Digestibility of OM, CP, CF and EE were significantly varied (P<0.05) among the experimental groups.The results of this study indicate that when layer hens diet is polluted with aluminum, it is toxic and causes a heavy losses in egg industry and causes negative effects on productive performance, utilization of nutrients, body weight gain, egg production, egg quality. There is a possibility of hazardous effects on human health and animal health from feeding polluted diets, eggs and meat or generally, from environmental pollution.