菊粉对肉仔鸡生长性能、免疫器官指数及抗氧化指标的影响

Effects of inulin on growth performance,immune organs indexes and antioxidantion of broilers

【目的】研究菊粉对1～42日龄肉仔鸡生长性能、免疫器官发育及抗氧化能力的影响。【方法】选用1日龄健康科宝肉鸡280只，随机分为4组，每组7个重复，每个重复10只鸡，分别饲喂含质量分数0（对照），0.5%，1.0%和1.5%菊粉的饲粮，饲养期为42 d，试验期间记录每天的采食量，分别于试验开始的1，7，14，21，28，35和42 d早晨以重复为单位空腹称体质量，计算平均日采食量、平均日增质量和料体质量比；分别于21和42 d取样测定肉仔鸡免疫器官指数及肝脏和血清中的抗氧化指标。【结果】与对照组相比，日粮中添加菊粉对1～42日龄肉仔鸡的生长性能无显著影响（P＞0.05），但有提高平均日增质量、平均日采食量和降低料体质量比的趋势；添加菊粉可显著提高1～42日龄肉仔鸡的脾脏、胸腺和法氏囊指数 （P＜0.05），其中以添加质量分数为1.0%和1.5%时效果较好；添加菊粉可显著降低1～42日龄肉仔鸡肝脏和血清的MDA含量，并可显著提高T-SOD、GSH-Px含量（P＜0.05），其中以添加菊粉的质量分数为1.0%时效果较好。【结论】菊粉有促进肉仔鸡生长、提高肉仔鸡免疫器官指数和抗氧化能力的作用，其中以质量分数为1.0%的添加量效果较好。

【Objective】The experiment was conducted to study effects of inulin on the growth performance,development of immune organs,and antioxidant capacity of broilers with age of 1-42 days.【Method】280 one-day-old Cobb 500 broilers were randomly divided into 4 groups with 7 replicates per group and 10 broilers per replicate,fed on diets with 0,0.5%,1.0% and 1.5% inulin respectively.The experiment lasted for 42 days and daily feed intake for all groups was recorded every day.Broilers were weighed weekly to determine the feed intake,growth rate and feed conversion ratio （FCR）.On day 21 and day 42,samples were collected for further assessment. Immune organ indexes and antioxidant indexes were determined.【Result】Compared to the control group,adding inulin to the diet improved average daily gain,daily feed intake and lower feed/gain,and had significant effect on growth performance of broilers with age of 1 to 42 days （P〉0.05）.Adding inulin in the diet showed significant effect on spleen,thymus and bursa indexes （P〈0.05）,in which 1.0% and 1.5% inulin showed the best effect.Adding inulin significantly reduced MDA and increased TSOD,GSHPx of liver and serum of broilers with age of 1 to 42 days （P〈0.05）,in which 1.0% inulin showed the best effect.【Conclusion】Adding inulin to diet improved growth performance,increased immune organs indexes and antioxidant capacity of broilers. 1.0% inulin showed the best effect.