The present study investigated the broiler production under different LED light colors and strains. In addition, studying effect of LED light color on body weights at different ages, feed consumption (FC), immunity, growth hormone and some carcass traits. The experiment was extended from January 2019 to February 2019. The highest mean value was recorded for IR strain body weight at 7 days of age (172.4 ± 0.60, 172.2 ± 0.9 and 169.94 ± 0.99 g) in green, blue and white light, respectively. But for Cobb strain (169.42 ± 1.03, 167.22 ± 1.04 and 168.028 ± 0.83 g) in green, white and blue light, respectively. Where, body weight at 35 days of age was recorded for Cobb and IR strains at blue light (2002.17±12.81 g) and (2083.51±19.61 g), respectively, followed by white light (1985.22 g) and (2001.91±16.30 g), respectively, while green light registered the least value (1980.68 g) and ( 2001.82 ± 10.66 g), respectively. There were significant differences (P ≤ 0.05) in the values of growth hormone concentrations between control group (white light) and other two lights groups blue and green, on other hand, there were no significant differences in the values of growth hormone concentrations between Cobb and IR strains, the interaction between LED colors and strains was insignificant (P = 0.982).

The experiment was designed to study the effect of dietary Nanoselenium on productive performance, egg quality and immunological traits in laying hens. A total number of 180 laying hens of Silver Montazah strain were used. Layers were divided randomly into six treatments. Five nano-selenium treatment diets with concentrations (200,160,120,80 and 40 mg/ ton for treatments (T2,T3,T4,T5 and T6), respectively. The treatment (T1) was used as control with 200 mg/ ton diet sodium selenite. The results showed that application of nano-selenium in layer diets was effective in increasing egg number and egg mass. Also, nano-selenium improved some immunological traits, feed conversion and some egg quality traits. The optimum level of nano-selenium was 200 mg/ ton diet, which recorded 5.40 g feed/ g egg mass compared to 9.24 g feed/ g egg mass in control treatment (200 mg/ ton diet). Applications of 200 mg/ ton diets nano-selenium were significantly decreased, heterophils (H%) and H/ A ratio. Where, Lymphocyte was significantly (p ≤ 0.01) increased. Also, there were positive relationship between shell thickness, shell weight (%) and white blood cells counts with increasing the levels of Nano-selenium in layer diets from 40 to 200 mg/ ton as compared to control.