| 枯草芽孢杆菌B7对肉鸡生长性能及免疫性能的影响 |
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| 引用本文： | 林显华,孙合美,谷巍.枯草芽孢杆菌B7对肉鸡生长性能及免疫性能的影响[J].中国畜牧兽医,2013,40(2):91-95. |
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| 作者姓名： | 林显华 孙合美 谷巍 |
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| 作者单位： | 山东宝来利来生物工程股份有限公司,山东泰安 271000 |
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| 摘 要： | 试验旨在研究肉鸡日粮中添加枯草芽孢杆菌B7对其生长性能及免疫功能的影响。将200只1日龄健康爱拔益加肉雏鸡随机分成5组,每组4个重复,每个重复10只。对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组分别在基础日粮中添加2×105、5×105、8×105和1×106 CFU/g枯草芽孢杆菌B7。试验期42 d。结果表明:①在整个试验阶段,除29～35日龄外,试验Ⅱ组肉鸡的日增重均高于对照组,料重比均低于对照组;36～42日龄时,与对照组相比,试验Ⅱ组肉鸡的日增重显著提高了10.25%(P<0.05),料重比显著降低了14.83%(P<0.05)。②28日龄时,试验Ⅱ组脾脏指数高于对照组31.96%,差异显著(P<0.05);除14和28日龄外,试验Ⅱ组法氏囊指数均显著高于对照组(P<0.05);试验Ⅱ组新城疫抗体效价处于较高水平,28和35日龄时,试验Ⅱ组新城疫抗体效价分别高于对照组16.04%和18.09%,差异显著(P<0.05);21、35和42日龄时,试验Ⅱ组血清中IgG含量分别高于对照组81.94%、46.67%和15.63%,差异显著(P<0.05)。由此可知,添加5×105 CFU/g枯草芽孢杆菌B7能够提高肉鸡的生长性能,增强肉鸡的免疫功能,综合比较,试验Ⅱ组的5×105 CFU/g为枯草芽孢杆菌B7的最佳添加量。
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| 关 键 词： | 枯草芽孢杆菌 肉鸡 生长性能 免疫性能 |
| 收稿时间： | 2012-09-03 |
Effects of Bacillus Subtilis on Growth Performance and Immune Function of Broilers |
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| LIN Xian-hua
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SUN He-mei
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GU Wei.Effects of Bacillus Subtilis on Growth Performance and Immune Function of Broilers[J].China Animal Husbandry & Veterinary Medicine,2013,40(2):91-95. |
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| Authors: | LIN Xian-hua SUN He-mei GU Wei |
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| Institution: | Shandong BaoLai-LeeLai Bioengineering Co., Ltd., Tai'an 271000, China |
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| Abstract: | This experiment was conducted to study the effect of Bacillus subtilis on growth performance and immunity in broilers. 200 one-day AA bilers with similar body weight were randomly divided into 5 groups with 4 replicates in each group, and with 10 broilers in each replicate.The groups received the same basal diet supplemented with 0, 2×105,5×105,8×105 and 1×106 CFU/g of Bacillus subtilis, respectively. The feeding trial lasted 42 days. The results showed as follows: in every test period, compared with the control group, the average daily gain in the group Ⅱ was higher, the F/G in group Ⅱ was lower, except at the age of 29 to 35 days. At the age of 36 to 42 days, the average daily gain in group Ⅱ increased significantly by 10.25%(P<0.05), the F/G in group Ⅱ decreased significantly by 14.83%(P<0.05), at the age of 28 days, the spleen index was significant higher than those in the control group, higher above 31.96% (P<0.05),the bursa of fabricius index in group Ⅱ was significant higher than those in the control group, except at the age of 14 and 28 days, the antibody titer in group Ⅱ was higher than those in the control group, at the age of 28 and 35 days, higher above 16.04% and 18.09%, respectively(P<0.05);at the age of 21,35 and 42 days, the serum immunoglobulin G concentrations in group Ⅱ was higher those in control group, higher above 81.94%, 46.67% and 15.63%,respectively(P<0.05). In conclusion, adding 5×105 CFU/g Bacillus subtilis B7 in diet could improve the growth performance and enhance the immune function of broilers. These results indicated that the 5×105 CFU/g was the best supplementation. |
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| Keywords: | Bacillus subtilis broilers growth performance immune function |
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