Abstract: Two thousand and four hundred Cherry valley super-M3 parent stocks at the age of forty weeks were selected and randomly allocated to five treatment groups with three replicates,four diets containing four different compound additives (0.5%,0.2%,0.2% and 0.2%) and basic diet were given to feed these ducks for 42 days in order to study the effects of 4 kinds of compound additives on performance and serum biochemical index in Cherry-valley super-M3 parent stock. The results showed that laying rates were increased with diets of compound additives. When compared to control group,the laying rates of group 1 and group 2 were significantly increased by 1.04% (P<0.05) and 1.97% (P<0.05),respectively. The percentage of healthy chicks of four trail groups were significantly lower than control group (P<0.05). The egg-shape index and the percentage of yolk of group 2 was higher than control group and that of the group 2,3 and 4 were increased by 0.88%,1.10% and 0.92% than control group (P<0.05),respectively. There were no difference on serum biochemical index of the female between control group and the four trail groups,the serum biochemical index of the drake were improved and the concentrations of high-dense lipoprotein cholesterol and alkaline phosphatase were all increased than that of control group (P<0.05). The results from this study indicated that different kinds of compound additives in the duck feed could increase the laying rate and decrease egg weight and improve serum biochemical index of parent stock.

Key words: Cherry valley duck; productive performance; serum biochemical index