Investigation on the changes of Bifidobacterium and lactic acid bacteria in soybean meal fermented feed
KANG, L.; Chen, H.; Feng, T.; Li, K.; Ni, Z.; Gao, E.; Yong, Y.
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The main objective of this research was to explore the dynamic changes of Bifidobacterium and lactic acid bacteria (LAB) in the process of feed fermentation under anaerobic condition, so as to increase the number of fermented bacteria of Bifidobacterium from the aspect of strain combination. The results showed that when Bifidobacterium lactis (B. lactis, i.e. Bifidobacterium animalis subsp. lactis) fermented with Bacillus coagulans or Lactobacillus paracasei, the maximum number of B. lactis in those samples was 9.42 times and 4.64 times of that of fermented sample with B. lactis only. The soybean meal was fermented by B. lactis, L. paracasei and B. coagulans, and the number of B. lactis reached the maximum after fermented 10 days, which was 6.13 times of that in unfermented sample. The reducing sugar content and highest activity of -galactosidase were higher than the control. These results suggest that B. coagulans and L. paracasei can promote the growth of B. lactis. It is inferred that B. coagulans can metabolize normally in aerobic, micro-aerobic and anaerobic environments, consume oxygen, produce digestive enzymes, and cooperate with L. paracasei to produce metabolic products benefit for the growth of B. lactis.
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