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Ruminal metagenomic analyses of goat data reveals potential functional microbiota by supplementation with essential oil-cobalt complexes

文献类型： 外文期刊

作者： Lei, Zhaomin 1 ; Zhang, Ke 2 ; Li, Chao 2 ; Jiao, Ting 3 ; Wu, Jianping 4 ; Wei, Yubing 5 ; Tian, Kechuan 6 ; Li, Chong 1 ;

作者机构： 1.Gansu Agr Univ, Coll Anim Sci & Technol, Lanzhou 730070, Gansu, Peoples R China

2.Northwest A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Shaanxi, Peoples R China

3.Gansu Agr Univ, Coll Pratacultural Sci, Lanzhou 730070, Gansu, Peoples R China

4.Gansu Acad Agr Sci, Lanzhou 730070, Gansu, Peoples R China

5.Anim Husb & Vet Stn Ganzhou Cty, Zhangye 734000, Peoples R China

6.Xinjiang Acad Anim Sci, Inst Anim Sci, Urumqi 830011, Peoples R China

7.Ralco Nutr Inc, Marshall, MN 56258 USA

8.Furst McNess Co, Freeport, IL 61032 US

关键词： Essential oils; Rumen metagenome; Ruminal fermentation; Ammonia emissions; Cobalt

期刊名称：BMC MICROBIOLOGY （ 影响因子：3.605； 五年影响因子：4.283 ）

ISSN： 1471-2180

年卷期： 2019 年 19 卷

页码：

收录情况： SCI

摘要： BackgroundEssential Oils (EO) are complex mixtures of plant secondary metabolites that have been proposed as promising feed additives for mitigating methane and ammonia emissions. We have previously demonstrated that Essential Oil-Cobalt (EOC) supplementation resulted in increased average daily gain and improved phenotypes (cashmere fiber traits, carcass weight, and meat quality) when cashmere goats received supplementation at approximately 2mg/kg of body weight. However, the ruminal microbiological effects of EO remain poorly understood with regard to the extent to which ruminal populations can adapt to EO presence as feed ingredients. The effects of varying levels of EO require additional study.ResultsIn this study, we conducted metagenomic analyses using ruminal fluid samples from three groups (addition of 0, 52, and 91mg) to evaluate the influence of dietary EOC supplementation on goat rumen bacterial community dynamics. EOC addition resulted in changes of ruminal fermentation types and the EOC dose strongly impacted the stability of ruminal microbiota. The Bacteroides sp. and Succinivibrio sp. type bacterial community was positively associated with improved volatile fatty acid production when the diet was supplemented with EOC.ConclusionsA clear pattern was found that reflected rapid fermentative improvement in the rumen, subsequent to butyrate metabolism and EOC based feed additives may affect rumen microbes to further improve feed conversion. This observation indicates that EOC can be safely used to enhance animal productivity and to reduce ammonia and waste gas emissions, thus positively impacting the environment.

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