本试验旨在探讨黄芩黄酮对肉仔鸡生长性能和免疫功能的影响。选择500只1日龄的爱拔益加（AA）肉仔鸡，随机分为5个处理，每个处理5个重复，每个重复20只鸡，各组分别在基础饲粮中添加0（对照组）、5、10、15、20 mg/kg黄芩黄酮,试验期为49 d。分别在21、35、49日龄测定各组生长性能、免疫器官指数和免疫球蛋白含量。结果表明：1）10 mg/kg添加组在试验期内对肉仔鸡平均体重有较大提高（P>0.05），5 mg/kg添加组显著提高了平均日采食量（P＜0.05），全期料重比和平均日增重未受影响。2）21日龄时，试验组脾脏指数显著高于对照组（P＜0.05），5和10 mg/kg添加组法氏囊指数显著高于对照组（P＜0.05）；35日龄时，5和10 mg/kg添加组脾脏指数也显著高于对照组（P＜0.05）；49日龄时10 mg/kg添加组胸腺指数显著高于对照组（P＜0.05）。3）全期10 mg/kg添加组免疫球蛋白A的含量最高（P>0.05），35日龄时，5、10、15 mg/kg添加组免疫球蛋白G（IgG）的含量显著高于对照组（P<0.05），49日龄时各试验组IgG的含量均显著高于对照组（P<0.05）。由此可知，饲粮中添加适量的黄芩黄酮在一定程度上可以提高肉仔鸡的生长性能，促进免疫器官的发育并提高免疫功能，其中以10 mg/kg的添加量效果较好。
This experiment was conducted to investigate the effects of flavonoids from Scutellaria baicalensis on growth performance and immune functions of broilers. Five hundred one-day-old Arbor Acres broilers were randomly divided into 5 treatments with 5 replicates in each treatment and 20 broilers in each replicate. The basal diets were supplemented with 0 (control group), 5 (EG5), 10 (EG10), 15 (EG15) and 20 (EG20) mg/kg flavonoids from Scutellaria baicalensis, respectively. Growth performance, immune organ indices and immunoglobulin content were determined in different periods. The experiment lasted for 49 days. The results showed as follows: 1) BW of broilers in EG10 was the highest among the 5 treatments (P>0.05); ADFI of broilers was significantly increased in EG5 (P<0.05); supplementation of flavonoids from Scutellaria baicalensis had no effect on the F/G and ADG during the whole experimental period. 2) At 21 days of age, spleen index of broilers in the experimental groups were significantly higher than that in control group (P<0.05), and fabricius index of broilers in EG5 and EG10 was significantly higher than that in control group (P<0.05); at 35 days of age, spleen index of broilers in EG5 and EG10 was significantly higher than that in control group (P<0.05); at 49 days of age, thymus index of broilers in EG10 was significantly higher than that in control group. 3) The IgA content of broilers in EG10 was the highest during the whole experimental period(P>0.05); at 35 days of age, the IgG content of broilers in EG5, EG10 and EG15 was significantly higher than that in control group (P<0.05), and at 49 days of age, IgG content of all experimental groups was significantly higher than that in control group (P<0.05). In conclusion, supplementation of proper amount of flavonoids from Scutellaria baicalensis to the diet can improve growth performance and enhance immune organ growth and function of broilers; and 10 mg/kg group had the best effect among the five groups.［Chinese Journal of Animal Nutrition, 2011, 23（8）：1409-1414］
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