The results indicate that the contents of serum Ca and P are not good indictors for the determination of the requirements of diet Ca and P for Pekin ducklings.

• 说明肉鸭具有较强的调节Ca、P代谢的能力，当日粮Ca、P水平在一定范围内变化，能够维持血Ca血P尤其是血Ca的稳定。