中文摘要：

本文旨在研究巨大芽孢杆菌对1～70日龄扬州鹅生长性能、屠宰性能、脏器指数及血清生化指标的影响。选择260只1日龄健康、体重相近的扬州鹅公鹅,随机分成4组,每组5个重复,每个重复13只。对照组（Ⅰ组）饲喂基础饲粮,试验组（Ⅱ、Ⅲ、Ⅳ组）分别饲喂添加20、40、60 mg/kg巨大芽孢杆菌的试验饲粮。试验期70 d。结果表明：1）Ⅳ组14、56日龄仔鹅体重显著大于对照组（P〈0.05）,28、42日龄仔鹅体重极显著大于对照组（P〈0.01）;Ⅳ组1～28日龄仔鹅平均日增重极显著高于对照组（P〈0.01）,显著高于Ⅱ组（P〈0.05）,Ⅳ组1~28日龄仔鹅料重比显著低于Ⅱ组（P〈0.05）,极显著低于Ⅲ组（P〈0.01）,Ⅲ、Ⅳ组29～70日龄仔鹅平均日采食量显著高于对照组（P〈0.05）。2）Ⅳ组全净膛率、半净膛率显著高于对照组（P〈0.05）,胸肌率、腿肌率、腹脂率各组之间无显著差异（P〉0.05）。3）Ⅳ组肌胃指数、空肠指数显著高于对照组（P〈0.05）。4）Ⅱ组高密度脂蛋白胆固醇含量显著高于Ⅳ组（P〈0.05）,低密度脂蛋白胆固醇含量显著低于对照组（P〈0.05）。由此可见,添加巨大芽孢杆菌可以改善仔鹅生长性能,对其全净膛率、半净膛率、肠道发育、血清中高密度脂蛋白含量、低密度脂蛋白含量有一定的影响,添加量为60 mg/kg时效果较好。

英文摘要：

The experiment was conducted to investigate the effects of Bacillus megaterium on growth performance,slaughter performance,visceral indices and serum biochemical parameters of geese from 1 to 70 days of age. Two hundred and sixty 1-day-old healthy male geese with similar body weight were randomly divided into4 groups with 5 replicates in each group and 13 geese per replicate. The geese in control group（ group Ⅰ）were fed a basal diet,and the others in experimental groups（ groups Ⅱ,Ⅲ and Ⅳ） were fed basal diet supplemented with 20,40 and 60 mg / kg Bacillus megaterium,respectively. The experiment lasted for 70 days.The results showed as follows： 1） the body weight of geese at 14,56 days of age and 28,42 days of age in group Ⅳ was significantly higher than that in control group（ P〈0. 05 or P〈0. 01）; the average daily gain of geese at 1 to 28 days of age in group Ⅳ was significantly higher than that in control group（ P〈0. 05） and groupⅡ（ P〈0. 01）; the ratio of feed to gain in group Ⅳ was significantly lower than that in group Ⅱ（ P〈0. 05） and group Ⅲ（ P〈0. 01）; the average daily feed intake of geese at 29 to 70 days of age in groups ⅢⅣ was significantly higher than that in control group（ P〈0. 05）. 2） The eviscerated rate and semi-eviscerated rate in group Ⅳ were significantly higher than those in control group（ P〉0. 05）,there were no significant difference in breast muscle rate,leg muscle rate and abdominal fat rate among all experimental groups（ P〈0. 05）. 3） The gizzard index and jejunum index in group Ⅳ were significantly higher than those in control group（ P〈0. 05）. 4） The serum high density lipoprotein cholesterol content in group Ⅱ was significantly higher than that in group Ⅳ（ P〈0. 05）; and the serum lowdensity lipoprotein cholesterol content in group Ⅱwas significantly lower than that in control group（ P 0. 05）. Therefore,the diets adding Bacillus megaterium can stimulate the growth performance