大蒜素对肉鸡生产性能和免疫机能的影响

选择1日龄爱拔益加(AA)商品肉鸡135只,随机分成3组(A、B、C),每组设3个重复,每个重复15只.A组为空白对照组,饲喂基础日粮；B组为在基础日粮中添加50 mg/kg洛克沙生和750 mg/kg 10％金霉素；C组在基础日粮中添加200 mg/kg大蒜素,研究大蒜素对肉鸡生产性能和免疫机能的影响.结果表明,与A组相比,大蒜素组在21、42日龄都能显著提高肉鸡的体重、日增重和成活率,显著降低21日龄料重比(P＜0.05),但42日龄料重比降低不明显,采食量在42日龄明显增加(P＜0.01)；与B组相比.21日龄大蒜素组也能显著提高肉鸡体重(P＜0.01)、日增重(P＜0.05),降低料重比(P＞0.05),在42日龄大蒜素组也使肉鸡体重、日增重增加,料重比下降(P＞0.05)；与A组相比,日粮中添加大蒜素后肉鸡胸腺指数和新城疫抗体效价显著提高(P＜0.05),但法氏囊指数和脾脏指数有所下降(P＞0.05)；与B组相比,胸腺指数和新城疫抗体效价也有所增加(P＞0.05).这说明大蒜素具有促进肉鸡生长和提高免疫功能的效果.

Effects of Allicin on Performance and Immunization of Broilers

135 one-day-old AA broilers were randomly divided into three groups(A,B,C),with three replicates each group and 15 birds each replicates.Group A was the negative control,feeding the basal diet.Group B was the positive control,adding 50 mg/kg roxarsone and 750 mg/kg 10% chlortetracycline to diet.Group C was the experiment,adding 200mg/kg allicin to diet.Effects of allicin on performance and immunization of broilers were studied.The results showed that: Compared with control A,body weight,daily gain and survival rate of broilers at 21 days old and 42 days old were significantly increased after adding allicin to the basal diet(P<0.01),and feed efficiency at 21 days old was significantly risen(P<0.05) but the increase at 42 days old wasn't significant in feed efficiency,and the intake of broilers at 42 day-old was significantly increased contrast to group A(P<0.01).Compared with antibiotic group,body weight and daily gain of broilers at 21 day-old were significantly risen after adding allicin to the basal diet(P<0.05),but the difference wasn't significant in body weight,daily gain and feed efficiency at 42 day-old contrast to group B(P>0.05).Compared with control group,the thymas index and serun antibody titres to ND in adding allicin to the basal diet were significantly enhanced(P<0.05),but the law pouh index and the splean index dropped slightly(P>0.05).The thymas index and serun antibody titres to ND in allicin also were enhanced contrast to group B,but the difference wasn't significant.The results indicated that allicin could stimulate growth of broilers and enhance immunization of broilers,and it could replace antibiotics in raising broilers.