1600 one-day-old cherry volley ducks were randomly allocated to 8 groups and fed with different proportions and combinations of antibiotic, zeolite, Chinese herbal medicine, effective microorganisms (EM), and amino acid-trace mineral chelates, aimed to approach the effects of different additives on the duck growth performance and duck house mephitis concentration. After fed with zeolite, EM, or Chinese herbal medicine, the daily gain and feed efficiency of the ducks increased (P < 0. 05) significantly. In the first 14 days, treatment zeolite + EM had the best effects on the increase of duck...
