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Effect of exogenous microorganisms on the fermentation quality, nitrate degradation and bacterial community of sorghum-sudangrass silage

文献类型： 外文期刊

作者： Zhao, Meirong 1 ; Zhang, Hongyu 1 ; Pan, Gang 1 ; Yin, Hang 1 ; Sun, Juanjuan 2 ; Yu, Zhu 3 ; Bai, Chunsheng 1 ; Xue, Yanlin 4 ;

作者机构： 1.Shenyang Agr Univ, Coll Hort, Shenyang, Peoples R China

2.Chinese Acad Agr Sci, Inst Grassland Res, Hohhot, Peoples R China

3.China Agr Univ, Coll Grassland Sci & Technol, Beijing, Peoples R China

4.Inner Mongolia Acad Agr & Anim Husb Sci, Inner Mongolia Engn Res Ctr Dev & Utilizat Microbi, Hohhot, Peoples R China

5.Inner Mongolia Acad Agr & Anim Husb Sci, Inner Mongolia Key Lab Microbial Ecol Silage, Hohhot, Peoples R China

关键词： sorghum-sudangrass silage; fermentation quality; nitrate; Lactobacillus buchneri; Lactobacillus brevis; Bacillus subtilis

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： This study aims to investigate the effects of adding Lactobacillus buchneri (LB), Lactobacillus brevis (LBR) and Bacillus subtilis (BS) on the fermentation quality, nitrate degradation and bacterial community of sorghum-sudangrass silage. The results showed that the addition of LB significantly increased the pH and acetic acid content (p < 0.05), but high-quality silage was obtained. The addition of LBR and BS improved the fermentation quality of sorghum-sudangrass silage. The use of additives reduced the nitrate content in sorghum-sudangrass silage. The LB group increased the release of N2O at 3-7 days of ensiling (p < 0.05), and LBR and BS increased the release of N2O at 1-40 days of ensiling (p < 0.05). On the first day of ensiling, all silages were dominated by Weisslla, over 3 days of ensiling all silages were dominated by Lactobacillus. Acinetobacter, Serratia, Aquabacterium, and unclassified_f_enterobacteriaceae showed significant negative correlations with nitrate degradation during sorghum-sudangrass ensiling (p < 0.05). The BS and LBR groups increased the metabolic abundance of denitrification, dissimilatory nitrate reduction, and assimilatory nitrate reduction (p < 0.05). Overall, the additive ensures the fermentation quality of sorghum-sudangrass silage and promotes the degradation of nitrate by altering the bacterial community.

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