Genotypic and Phenotypic Characteristics of Lactic Acid Bacteria Associated with Forage Plants in the Native Grassland of Western Inner Mongolia and Their Application for Alfalfa Silage Fermentation
文献类型: 外文期刊
第一作者: Li, Wenlong
作者: Li, Wenlong;Li, Feng;Zhang, Chen;Gao, Jie;Tao, Ya;Tao, Ya;Tao, Ya
作者机构: Chinese Acad Agr Sci, Inst Grassland Res, Hohhot 010010, Peoples R China;Minist Agr & Rural Affairs, Key Lab Model Innovat Forage Prod Efficiency, Hohhot 010010, Peoples R China;Natl Ctr Technol Innovat Dairy, Hohhot, Peoples R China
关键词: Inner Mongolia; natural forage plant; Lactiplantibacillus plantarum; Pediococcus pentosaceus; alfalfa silage
期刊名称:ANIMALS ( 2022影响因子:3.0; 五年影响因子:3.2 )
ISSN: 2076-2615
年卷期: 2024 年 14 卷 10 期
收录情况: SCI
摘要: This study was conducted to investigate the genotypic and phenotypic characteristics of lactic acid bacteria (LAB) associated with forage plants in the native grassland of western Inner Mongolia and to evaluate their effects on alfalfa silage fermentation. Forage plants and their spontaneous fermentation silages were analysed using culture-based techniques for LAB isolation; the phenotypic properties and 16S rDNA and pheS or rpoA gene sequences of the isolates were evaluated; alfalfa was ensiled with four additive combinations: Lactiplantibacillus plantarum subsp. plantarum (GI19), Lact. plantarum subsp. plantarum and Pediococcus pentosaceus (GI19+GI51), GI19 and 20 g/kg fresh matter of sucrose (GI19+S), and GI19+GI51+S, for 60 d. A total of 73 strains belonging to 16 species were isolated. All isolates grew at 5-45 degrees C and in 3.0% NaCl, and most of them grew in 6.5% NaCl. Enterococcus faecalis and Lact. plantarum were 26.03% and 17.81% of the total isolates, respectively. All additives improved the silage quality, while GI19+S was more effective for alfalfa ensiling with a higher lactic acid content and lower pH, undesirable microorganism counts, and acetic acid and NH3-N contents than remnant additives. In conclusion, the LAB species were diverse, and most of them possessed good cryotolerance and osmotolerance; GI19+S was the optimal inoculant for alfalfa fermentation improvement.
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