Effects of aflatoxin B1 and absorbents on growth and immunity of avian influenza vaccine in ducks.

The objectives of present study were to research the effects of aflatoxin B1 and mycotoxin absorbents on the growth performance,retention of aflatoxin B1 in liver and passing rate of avian influenza antibody in ducks. A total of 900 ducks at the age of 11-day-old were randomly allotted to 9 groups with 5 replicates of each and each replicate contained 20 ducks. The 9 groups contained 3 levels of aflatoxin B1 (25,50 and 75 μg/kg) and 3 levels of adsorbent (0,750 and 1 500 mg/kg) in a 2×3 factorial arrangement. Aflatoxin B1 used in the experiment was offered by mildew corn and the content in which was 500 μg/kg. The experiment lasted for 32 days. The results showed as follows: 1) with the aflatoxin B1 levels increasing,the average daily feed intake and average daily gain of ducks were significantly decreased (P0.05),while average daily feed intake,average daily gain and feed/gain of ducks were not significantly affected by addition of adsorbent (P0.05); 2) the absolute weight of liver and retention of aflatoxin B1 in liver were increased significantly or extremely significantly (P0.01 or P0.05) with the increasing of aflatoxin B1 levels,and the injury on liver caused by toxin was alleviated by addition of adsorbent; 3) avian influenza antibody could not be conducive to produce when provided aflatoxin B1 more than 50 μg/kg,moreover,aflatoxin B1 above 75 μg/kg might cause the death of ducks,which couldn’t eliminate the bad effects by addition mycotoxin adsorbent. In conclusion,to a certain extent,absorbents could reduce the damage of aflatoxin B1 on performance and liver,and improve the passing rate of avian influenza antibody in ducks.