Inoculants Delay Spoilage of High Moisture Alfalfa Silages by Regulating Bacterial Community Composition

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2020 Sep 9

PMID 32903392

Citations 26

Authors

Fengyuan Yang

Yanping Wang

Shanshan Zhao

Yuan Wang

Affiliations

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Abstract

The objective of this study was to investigate the mechanism of () involved in improving fermentation quality of naturally ensiled alfalfa under poor conditions. High-moisture wilted alfalfa was ensiled without inoculants (CK) or with inoculation of two additives (LPI and LPII). The pH and fermentation products of silage were determined after 30 and 90 days of ensiling. Additionally, the bacterial community compositions were analyzed. The inoculants significantly promoted lactic acid accumulation, and abundance for both periods. At 90 days, silage in CK exhibited a high pH, a loss in dry matter, and a high concentration of ammoniacal nitrogen. The inoculations of significantly inhibited the growth of Clostridia, and reduced ammoniacal nitrogen concentration in silage ( < 0.05). Thus, inoculation with improved the fermentation quality of alfalfa silage and inhibited the growth of spoilage microorganisms, and further delayed spoilage of alfalfa silage under adverse ensiling conditions.

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