This study was conducted to explore the effects of maize at different storage periods on immune function of broilers.Two hundred and forty one-day-old Cobb 500 female broilers were chosen and allocated to 3 groups(8 replicates per group and 10 chickens per replicate) according to the principle of body weight balance.Broilers in control group were fed maize stored 0 year and broilers in experiment groups were fed maize stored 2 or 4 years.The experiment lasted for 42 days.Lymphocyte proliferation rate of per...