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Identification of lactic acid bacteria in the feces of dairy cows fed whole crop maize silage to assess the survival of silage bacteria in the gut

文献类型： 外文期刊

作者： Han, Hongyan 1 ; Wang, Chao 2 ; Li, Yanbing 3 ; Yu, Zhu 4 ; Xu, Qingfang 5 ; Li, Guangpeng 1 ; Tang Thuy Minh 6 ; Nishino 1 ;

作者机构： 1.Inner Mongolia Univ, Coll Life Sci, Res Ctr Lab Anim Sci, Hohhot 010070, Inner Mongolia, Peoples R China

2.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot, Inner Mongolia, Peoples R China

3.Heilongjiang Bayi Agr Univ, Coll Anim Sci & Vet Med, Daqing, Heilongjiang, Peoples R China

4.China Agr Univ, Inst Grassland Sci, Beijing, Peoples R China

5.Shanxi Agr Univ, Dept Grassland Sci, Taigu, Shanxi, Peoples R China

6.Okayama Univ, Dept Anim Sci, Okayama, Japan

关键词： dairy cows;denaturing gradient gel electrophoresis;lactic acid bacteria;quantitative polymerase chain reaction;silage

期刊名称：ANIMAL SCIENCE JOURNAL （ 影响因子：1.749； 五年影响因子：1.909 ）

ISSN： 1344-3941

年卷期： 2018 年 89 卷 1 期

页码：

收录情况： SCI

摘要： In order to assess the survival of lactic acid bacteria (LAB) in whole crop maize silage in the gut of dairy cows, one representative silage sample and three different feces samples were collected from dairy cows on three dairy farms in Hua Bei, China and three dairy farms in Kyushu, Japan. The composition of the bacterial community was examined by denaturing gradient gel electrophoresis and quantitative polymerase chain reaction. Lactobacillus acetotolerans was detected in all bunker-made maize silage samples, regardless of the dairy farm or sampling region from which they were sourced. A total of eight LAB species were detected in the maize silage samples, of which three (L. acetotolerans, L. pontis and L. casei) appeared to survive digestion. The populations of L. acetotolerans in silage and feces were 10(6-7) and 10(3-4) copies/g, respectively, indicating that, even for the LAB species showing potential survival in the gut, competition in this niche may be harsh and the population may substantially decrease during the digestion process. It may be difficult for silage LAB to survive in the gut of silage-fed dairy cows, because marked decrease in population can take place during the digestion process, even for surviving species.

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