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Changes in methane emission, rumen fermentation, and methanogenic community in response to silage and dry cornstalk diets

文献类型：外文期刊

作者： Liu Chong ¹ ; Zhu Zhuping ¹ ; Guo Tongjun ² ; Luo Yongming ² ; Dong Hongmin ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100193, Peoples R China

2.Xinjiang Acad Anim Sci, Feed Res Inst, Urumqi, Peoples R China

关键词： Methane;Methanogenesis;Rumen;Sheep

期刊名称：JOURNAL OF BASIC MICROBIOLOGY （影响因子：2.281；五年影响因子：2.516 ）

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年卷期：

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收录情况： SCI

摘要： This study aimed to investigate the effect of silage or dry cornstalk diets on methane emission, rumen fermentation, and methanogenic community, and reveal whether the change of methanogenic compositions was related to the methane production. A total of 39 sheep were divided into four groups, fed diets of different concentrate level based on silage or dry cornstalk roughage for 40 days. It was found that, at 20% concentrate level, the sheep fed silage could suppress methanogenesis significantly in contrast with the silage diet (p<0.05). The ruminal acetate:propionate ratio was 3.17 in the silage-fed sheep significantly lower than 3.78 in the dry cornstalk-fed sheep (p<0.05), reflecting the effect of fermentation on methane output was related to roughage types. Furthermore, the methanogens was found to be significantly lower abundance (p<0.05), and showed a different pattern using multivariate statistical analysis in silage-fed sheep. Compared with dry cornstalk diet, silage diet of 20% concentrate reduced methane production, decreased methanogenic abundance, and induced change of Methanobrevibacter composition at strain levels. This study showed variation of methanogenic compositions at strain level and its probable relationship with methane production, and provided microbial information to explain the low methane output when the animals were fed silage.

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Changes in methane emission, rumen fermentation, and methanogenic community in response to silage and dry cornstalk diets

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Changes in methane emission, rumen fermentation, and methanogenic community in response to silage and dry cornstalk diets

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