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Succession of Bacterial Community During the Initial Aerobic, Intense Fermentation, and Stable Phases of Whole-Plant Corn Silages Treated With Lactic Acid Bacteria Suspensions Prepared From Other Silages.
- Source :
- Frontiers in Microbiology; 3/26/2021, Vol. 11, pN.PAG-N.PAG, 15p
- Publication Year :
- 2021
-
Abstract
- The present study was aimed at investigating the bacterial community in lactic acid bacteria (LAB) suspensions prepared from whole-plant corn silage (LAB suspension-CS) and Elymus sibiricus silage (LAB suspension-ES) and the bacterial community succession of whole-plant corn silages inoculated with LAB suspension-CS or LAB suspension-ES during initial aerobic phase, intense fermentation phase, and stable phase. The LAB suspensions were cultured in sterile Man, Rogosa, Sharpe broth at 37°C for 24 h and used as inoculants for ensiling. The chopped whole-plant corn was treated with distilled water (CK), LAB suspension-CS (CSL), or LAB suspension-ES (ESL) and then ensiled in vacuum-sealed plastic bags containing 500 g of fresh forage. Silages were sampled at 0 h, anaerobic state (A), 3 h, 5 h, 10 h, 24 h, 2 days, 3 days, 10 days, 30 days, and 60 days of ensiling with four replicates for each treatment. The results showed that Lactobacillus , Weissella , and Lachnoclostridium _5 dominated the bacterial community in LAB suspension-CS; Lactobacillus was the most predominant bacterial genus in LAB suspension-ES. During the initial aerobic phase (from 0 h to A) of whole-plant corn silage, the pH and the abundances of Pantoea , Klebsiella , Rahnella , Erwinia , and Serratia increased. During the intense fermentation phase (from A to 3 days), the pH decreased rapidly, and the microbial counts increased exponentially; the most predominant bacterial genus shifted from Pantoea to Weissella , and then to Lactobacillus ; inoculating LAB suspensions promoted the bacterial succession and the fermentation process, and LAB suspension-CS was more effective than LAB suspension-ES. During the stable phase (from 3 to 60 days), the pH and the microbial counts decreased, and Lactobacillus dominated the bacterial community with a little decrease. The results also confirmed the existence of LAB fermentation relay during fermentation process, which was reflected by Weissella , Lactococcus , and Leuconostoc in the first 5 h; Weissella , Lactococcus , Leuconostoc , Lactobacillus , and Pediococcus between 5 and 24 h; and Lactobacillus from 24 h to 60 days. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1664302X
- Volume :
- 11
- Database :
- Complementary Index
- Journal :
- Frontiers in Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 149711196
- Full Text :
- https://doi.org/10.3389/fmicb.2021.655095