The oxidation indices of yolk were detected to explore the effects of the medical fungal fermental products on the anti-oxidation function in hens.960 240-day-old hens were randomly divided into four groups by a single factor completely randomized design.The hens in control group was fed basal diet,the hens in 3-dose groups,high,medium and low doses,were fed plus 0.2%,0.35%,0.5% medical fungal fermental products per kg feed,respectively.At the day of 180th,210th and 240th,the yolk malondialdehyde(MDA) conte...