Fermentation Technologies for the Production of High-Quality Feed: 2nd Edition

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Industrial Fermentation".

Deadline for manuscript submissions: 20 October 2025 | Viewed by 507

Special Issue Editor


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Guest Editor
Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
Interests: animals; ruminant nutrition and feed science
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Special Issue Information

Dear Colleagues,

Fermentation has long been recognized as a valuable process for enhancing the nutritional quality and digestibility of feed ingredients, and fermented feed research focuses on enhancing animal feed quality and nutrition through fermentation. This involves using beneficial microorganisms to break down complex compounds into simpler forms, improving nutrient availability and digestion. Through fermentation techniques, such as solid-state or liquid fermentation, microorganism growth is optimized, resulting in several benefits. These include increased levels of enzymes and vitamins, a decreased presence of anti-nutritional factors, and improved gut health. Additionally, alternative feed resources like by-products or food waste are explored to create highly nutritious feed.

The Special Issue aims to collect research and review papers related to the advancements and applications of fermentation technologies in the production of feed for animals.

Dr. Jianxin Xiao
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fermentation is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fermentation process
  • fermented feed
  • feed additives
  • feed resources
  • animal health
  • animal growth
  • nutritional value
  • feed preservation
  • microorganisms

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Published Papers (1 paper)

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Research

14 pages, 578 KB  
Article
Application of Hops (Humulus lupulus L.) and β-Acid Extract to Improve Aerobic Stability and In Vitro Ruminal Fermentation of Maralfalfa Grass Silage
by Lianne Romero-Vilorio, Bexy González-Mora, Yamicela Castillo-Castillo, Francisco Castillo-Rangel, Einar Vargas-Bello-Perez, Joel Dominguez-Viveros, Monserrath Felix-Portillo, Robin C. Anderson, Michael E. Hume, Michael D. Flythe, Omar G. Nájera-Pedraza, Jaime Salinas-Chavira and Oscar Ruiz-Barrera
Fermentation 2025, 11(9), 529; https://doi.org/10.3390/fermentation11090529 - 10 Sep 2025
Viewed by 337
Abstract
The potential of hops (Humulus lupulus L.) and β-acid extract were evaluated for improving the quality of maralfalfa grass (Cenchrus purpureus) silage (with added sorghum grain, sorghum straw, and urea) during aerobic exposure and their residual effects on in vitro [...] Read more.
The potential of hops (Humulus lupulus L.) and β-acid extract were evaluated for improving the quality of maralfalfa grass (Cenchrus purpureus) silage (with added sorghum grain, sorghum straw, and urea) during aerobic exposure and their residual effects on in vitro ruminal fermentation characteristics. Silage samples and ground hops pellets (Galena and Chinook varieties) as well as β-acid mixtures were incubated at 37 °C for 24 h and then maintained under aerobic exposure for 12 h. The sample pH, counts of filamentous fungi, yeasts, and total coliforms, and volatile fatty acid (VFA) concentrations were determined. Subsequently, in vitro ruminal fermentation was conducted to determine total gas production and concentrations of hydrogen, methane, carbon dioxide, and VFAs. The β-acid treatment controlled yeast populations, but an increase (p < 0.05) in pH values was observed for the Galena and Chinook treatments compared to the Control. However, pH did not differ significantly (p > 0.05) between the Control and the β-acid treatment. Butyric acid concentrations in the silage were lower (p < 0.05) compared to the Control, except in the silage treatment with Galena. In the in vitro ruminal fermentation, the β-acid treatment showed higher butyric acid levels than the Chinook and Galena, but these differences were not significant (p > 0.05). There were no differences (p > 0.05) in methane between the treatments. An increase (p < 0.05) in propionic acid concentration was observed in the in vitro ruminal fermentation with β-acids. It was concluded that β-acids could help reduce silage deterioration during the aerobic phase, reducing the butyric acid and yeast populations, and their residual effect could improve ruminal fermentation, increasing propionate and acetate concentrations. Full article
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