The dynamics of the bacterial communities developed in maize silage

Javad Gharechahi, Zohreh Akhavan Kharazian, Sajjad Sarikhan, Gholamreza Salehi Jouzani*, Mahnaz Aghdasi, Ghasem Hosseini Salekdeh

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Ensilage provides an effective means of conserving summer-grown green forage to supply as winter feed to ruminants. The fermentation process involved in the ensilage process relies on lactic acid bacteria (LAB). Here, 16S ribosomal DNA amplicon pyrosequencing was used to follow the dynamic behaviour of the LAB community during the ensilage of maize biomass, with a view to identify the key species involved in the process. The biomass used for ensilage was a single-cross maize hybrid, harvested at the milk-line stage. The crop was grown at three contrasting locations. Aspects of the physico-chemical composition of the material and the LAB species present were sampled at 0, 3, 6, 14, 21 and 32 days after ensilage was initiated. In all three cases, members of the Leuconostocaceae family dominated the epiphytic bacterial community, notably Leuconostoc and Weissella, but some variation was noted in the abundance of certain Leuconostocaceae and Lactobacillaceae species, as well as that of some Acetobacteraceae, Enterobacteriaceae and Moraxellaceae species. The constellation of the microbiome which developed during the ensilage process differed markedly from that of the epiphytic one, with Lactobacillaceae, particularly Lactobacillus and Pediococcus spp. dominating. The abundance of heterofermentative Leuconostocaceae spp. in the epiphytic community and the extent of the transition from hetero- to homo-fermentation during the initial ensilage period are important factors in determining silage quality.

Original languageEnglish
Pages (from-to)1663-1676
Number of pages14
JournalMicrobial Biotechnology
Volume10
Issue number6
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

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Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this

Gharechahi, J., Kharazian, Z. A., Sarikhan, S., Jouzani, G. S., Aghdasi, M., & Hosseini Salekdeh, G. (2017). The dynamics of the bacterial communities developed in maize silage. Microbial Biotechnology, 10(6), 1663-1676. https://doi.org/10.1111/1751-7915.12751