The experiment was conducted to investigate the effects of dietary calcium level on growth performance,tibia quality,serum biochemical parameters,and meat quality in yellow-feathered broilers aged from 43 to 63 days,and then to estimate the calcium requirement for diets of yellow-feathered broilers.One thousand and two hundred forty-three-day-old male broilers were randomly assigned to six treatments with five replicates per treatment and forty broilers per replicate according to the principle of body weigh...