本试验旨在研究黄芪多糖(APS)对肉仔鸡生长前期的生长性能、器官发育和抗氧化能力的影响.试验选用1日龄健康艾维茵肉仔鸡72只,随机分为4组,每组3个重复,每个重复6只鸡,分别饲喂含0、0.2%、0.4%和0.6% APS的饲粮,饲养试验为14 d.结果表明:添加APS对1～14日龄肉仔鸡的生长性能无显著影响(P>0.05);APS对7日龄肉仔鸡的肝脏、胰腺及免疫器官指数影响明显,但是对14日龄肉仔鸡的相应指数影响不大;添加APS可明显提高7和14日龄肉仔鸡血清和肝脏的抗氧化酶活性,降低丙二醛(MDA)含量.结果提示,在饲料中添加APS可促进1～7日龄肉仔鸡内脏器官的发育,提高1～7和1～14日龄肉仔鸡血清和肝脏中抗氧化酶的活性,但对生长性能无显著影响.%This experiment was conducted to study the effects of Astragalus polysaccharides (APS) on growth performance, viscera indices and antioxidant capacity of broilers aged 1 to 14 days. Seventy-two healthy 1-dayold Avian broilers were randomly assigned to 4 dietary treatments with 3 replicates per treatment and 6 broilers per replicate. The broilers were fed the basal diet supplemented with 0, 0.2％, 0.4％ and 0.6％ APS, respec tively. The feeding trial lasted for 14 days. The results were showed as follows: 1 ) there were no significant effects of APS on growth performance ( P ＞ 0.05); 2 ) APS increased liver index, pancreatic index, and immune organ indices significantly in 7-day-old broilers ( P ＜ 0.05 ), but no significant effects on 14-day-old broilers were found ( P ＞ 0.05); 3 ) adding APS to the diets could increase serum and liver antioxidant enzyme activities and decrease malondialdehyde (MDA) content in both 7- and 14-day-old broilers. These results indicate that APS can improve organ development in broilers aged 1 to 7 days, and increase the activities of antioxidant enzymes in serum and liver to strengthen the immunity and antioxidant capacity of broilers, but there are no significant effects on the growth performance of broilers aged 1 to 14 days. [ Chinese Journal of Animal Nutrition,2011,23 (3) :486-491]
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