Effects of Soybean Isoflavone Addition in Feed on the Growth and Immune Performance of Weaned Rabbits
This study aimed to investigate the impact of adding soybean isoflavones in low-protein,low-soybean meal diets on the growth and immune performance of weaned rabbits.A total of 80 healthy and similar-weight weaned rabbits at 30 days of age were selected and randomly divided into four groups(A,B,C,D),with each group having 5 replicates,each consisting of 4 rabbits.The four groups were supplemented with soybean isoflavones at doses of 0,25,50,and 100 mg/kg,respectively.The results showed that the final body weight and average daily gain of weaned rabbits in Groups C and D were significantly higher than those in Groups A and B(P<0.05).The feed-to-gain ratio in Groups C and D was significantly lower than in Groups A and B(P<0.05).The IgA and IgG levels in Group D weaned rabbits were significantly higher than in Group A(P<0.05).The IgM levels in Groups C and D weaned rabbits were significantly higher than in Groups A and B(P<0.05).These results indicate that the addition of soybean isoflavones in the feed has a promotive effect on the growth and immune performance of weaned rabbits,with the optimal effect observed at a dosage of 50 mg/kg of soybean isoflavones.
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