AI Article Synopsis
- - The study investigated how oregano essential oil extraction residues (ORES) impact the fermentation quality of corn silage, both with and without fungal infection, over a period of 180 days.
- - ORES delayed the decline in pH and did not hinder lactic acid production in non-fungal infected silages, but it slowed down fermentation in fungal infected silages; it also significantly reduced ethanol levels in the silage.
- - Co-ensiling with ORES helped reduce the risk of contamination from harmful bacteria associated with fungal infection, suggesting that using ORES could be a beneficial way to recycle agro-industrial waste in silage production.
Article Abstract
The study aimed to evaluate the effect of oregano essential oil extraction residues (ORES) on the fermentation quality of corn silage. Non-fungal infected (NFI) and fungal infected (FI) corn were ensiled with 20% (wet weight) of ORES for 180 d. The inclusion of ORES delayed pH decline regardless of fungal infection. The inclusion of ORES did not adversely affect lactic acid (LA) production in NFI silages but retarded the initial LA fermentation of FI silages. Co-ensiling corn with ORES significantly decreased ethanol content. Co-ensiling FI corn with ORES significantly increased the fungal Chao1 and Shannon indices compared to FI-CON silages but did not affect the bacterial Chao1 and Shannon indices. The fungal infection aggravated the risk of Paenibacillus and Clostridium contamination, which was mitigated by co-ensiling with ORES. In conclusion, fungal infection suppressed ensiling fermentation, and heightened the risk of proliferation of undesirable bacteria, while ORES relieved these risks. Ensiling ORES with corn as forages is a potential and promising strategy for the efficient reusing of agro-industrial waste.
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| http://dx.doi.org/10.1016/j.jenvman.2024.123172 | DOI Listing |
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