nano-selenium affects on duodenum, jejunum, ileum and colon characteristics in chicks: an animal model

Selenium has many roles on the functioning of humans and animals. chicks as animal model can play an important role to distinguish the role/function of selenium. the objective of the present study was to test the effect of variable doses of nano-selenium supplement on the chicken gastrointestinal tract. a total of 180 male ross chicks were divided into six groups, with three replicates for each group and ten birds per replicate. group 1 was the control group and was fed standard feeding for full experiment. groups 2-6 were given variable doses of nano-selenium supplement from 1st-42nd days of age; group 2 (0.1 mg/kg), group 3 (0.2 mg/kg), group 4 (0.3 mg/kg), group 5 (0.4 mg/kg) and group 6 (0.5 mg/kg). the results showed a decrease in the weights of small and large bowels with simultaneous increase in their lengths. optimum doses of supplementary nano-selenium for bowel development are suggested.