红景天提取物对西藏缺氧地区肉仔鸡早期免疫功能的影响

Effect of Rhodiola extracts on immune functions of newly hatched broilers reared at hypoxic environment in Tibet

本研究旨在探讨红景天提取物对西藏缺氧地区肉仔鸡饲养早期(0~14 d)免疫功能的影响。450只健康1日龄雄性AA肉鸡随机分成5组,每组6个重复,每个重复15只鸡。各组分别在基础日粮(对照组)中添加0%、0.1%、0.15%、0.2%和0.4%红景天水提物干粉,试验14 d测定指标包括死亡率、免疫球蛋白水平和牛血清白蛋白(BSA)抗体效价。结果发现,与对照组相比,0.2%和0.4%红景天提取物组显著降低肉鸡早期死亡率(P<0.05),并且在试验14 d,与对照组相比,0.2%和0.4%红景天提取物组血浆中Ig A、Ig G的水平和BSA抗体滴度显著提高(P<0.05)。整个饲养期,0.1%和0.15%红景天提取物组与对照组所有测定指标均无显著差异。本试验结果表明,西藏高原肉仔鸡饲喂红景天提取物能降低早期死亡率,这可能与其改善雏鸡免疫机能有关,红景天提取物最适添加水平是0.2%。

This experiment was conducted to evaluate whether administration of Rhodiola extracts could improve immune response broilers reared at high altitude in Tibet.A total of 450,1-day-age healthy male AA broilers were randomly divided into 5 treatments by body weight,15birds per pen with 6 pens per treatment.The 5 treatments were fed with a basal diet supplemented with 0,0.1%,0.15%,0.2%and 0.4%Rhodiola extracts.The experiment lasted for 42 days.The results showed that compared to the control group supplementation of 0.2%and 0.4%Rhodiola extracts significantly decreased the mortality(P<0.05),and increased the levels of IgA,IgG and anti-BSA antibodies.There was no significant difference between control group and 0.1%and 0.15%Rhodiola extracts groups(P>0.05).These results indicated that dietary supplementation with Rhodiola extracts could decrease the mortality rate and it may be associated with enhanced immune function.Rhodiola extracts is effective at the concentration of 0.2%.