| 摘要: |
| 选用336只1日龄雄性爱拔益加(AA)肉仔鸡,研究添加不同水平的木寡糖(0,1、2和4 g/kg)对生长性能及消化道生理学和粘膜形态学部分指标的影响。结果显示:日粮添加木聚寡糖不影响肉仔鸡生长速度,但含有2g/kg木寡糖的日粮可显著降低肉仔鸡0~7周龄的耗料增重比(P<0.05),与对照组相比下降幅度可达4%。木寡糖可以增加回肠内乳酸菌数,增加幅度与对照组相比分别为26.3%、20.8%和28.1%,也可以使盲肠内大肠杆菌数减少8%、26.9%和12.0%(P<0.05)。此外,添加2和4 g/kg木寡糖组降低回肠内氨态氮含量至对照组的77.8%和68.3%,并提高了肉仔鸡回肠内丙酸、异丁酸、异戊酸的含量(P<0.05),但对空肠粘膜形态无显著影响(P>0.05)。 |
| 关键词: 木聚寡糖,生产性能,肠道微生物,氨态氮,挥发性脂肪酸 |
| DOI：10.11841/j.issn.1007-4333.2006.04.089 |
| 分类号:S831.4 S831.1 |
| 基金项目:国家重大基础研究发展计划项目(2004CB117504) |
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| Effect of XOS on growth performance, intestinal physiology and morphology of broilers |
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Wu Yuanyuan Guo Yuming Wang Zhong Nie Wei
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| Abstract: |
| This study was conducted to determine the effects of dietary XOS supplementation on growth performance and intestinal physiology and morphological parameters of mucous membrane of broilers.Four levels of XOS were set as 0,1,2,and 4 g/kg. Three hundred and 36 one-day-old Arbor Acre male broiler chicks were randomly allocated into four groups with 6 replicates each.The result showed that the accumulative mortality and feed conversion ratio during 0 to 7 wk were significantly reduced by XOS(P<0.05).Compared to the control,feeding with 2 g/kg XOS reduced by 4% the feed conversion ratio during 0 to 7 wk.The number of Lactobacillus in ileum significantly increased up to 26.3%,20.8% and 28.1% respectively,whereas the number of coliform in cecum decreased by 8%,26.9% and 12.0%(P<0.05),accordingly.XOS also could decrease the content of ammoniacal nitrogen to 77.8% and 68.3% of the control,and increase the content of monoprop,isobutyric acid and isovalerate in ileum(P<0.05).Dietary supplementation of XOS did not influence the morphology of intestinal mucous membrane. |
| Key words: XOS,performance,intestinal microorganisms,ammoniacal nitrogen,volatile fatty acid |
