Investigating the efficacy of an exopolysaccharide (EPS)‐producing strain Lactiplantibacillus plantarum L75 on oat silage fermentation at different temperatures

Author:

Su Rina1,Liang Ying1,Chen Hu1,Sheoran Neha1,Ke Wencan2,Bai Jie3,Jia Mengya1,Zhu Jie1,Li Qiang1,Liu Qi1,Chen Xiaojun4,Guo Xusheng1ORCID

Affiliation:

1. School of Life Sciences, Probiotics and Life Health Institute Lanzhou University Lanzhou China

2. Department of Animal Science Ningxia University Yinchuan China

3. College of Grassland Science Gansu Agricultural University Lanzhou China

4. Animal Husbandry and Veterinary Bureau of Anding District Dingxi China

Abstract

AbstractThis study investigates the effectiveness of an exopolysaccharide (EPS)‐producing strain (Lactiplantibacillus plantarum L75) alone or in combination with Saccharomyces cerevisiae on the fermentation characteristics, antioxidant capacities and microbial community successions of oat silage stored at various temperatures. A rapid decrease in pH and lactic acid accumulation was observed in silages treated with L. plantarum and S. cerevisiae (LS) as early as 3 days of ensiling (p < 0.05). Over the ensiling period of 7–60 days, L. plantarum (L)‐inoculated groups showed the lowest pH, lowest ammonia nitrogen and the highest amount of lactic acid regardless of the storage temperatures. When the oat silage was stored at 15°C, LS‐inoculated group exhibited a higher superoxide dismutase (SOD) activity than control and L‐inoculated group. Furthermore, the proportion of Lactiplantibacillus in the combined inoculation group increased by 65.42% compared to the L‐inoculated group (33.26%). Fungal community data revealed abundant Penicillium carneum in the control and L‐inoculated groups stored at 15°C. Conclusively, these results showed that combined inoculation of L. plantarum L75 and S. cerevisiae improved the fermentation quality of oat silage at 15°C, thus proposing a technique for enhancing the fermentation quality of silage in regions with low temperatures during harvest season.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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