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Phytochemicals and Feed Additives in Ruminant Nutrition: Effects on Health,...
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Phytochemicals and Feed Additives in Ruminant Nutrition: Effects on Health, Microbiota, and Methane Emissions

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Nutrition".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 127

Special Issue Editors

Dr. Maocheng Jiang

E-Mail Website
Guest Editor
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
Interests: animal nutrition; energy metabolism; plant extract additives; immune response
Dr. Sijia Liu

E-Mail Website
Guest Editor
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
Interests: animal nutrition; rumen microbiota; microbial regulation
Prof. Dr. Jianbo Cheng

E-Mail Website
Guest Editor
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
Interests: animal nutrition; utilization of feed resources; quality of livestock products; development of feed additives

Special Issue Information

Dear Colleagues,

With improvements in living standards, the demand for high-quality animal products is increasing. Animal diseases threaten production and product quality, but antibiotic treatments pose risks to ruminant health due to antibiotic residue issues. Thus, developing alternative phytogenic feed additives and novel plant extracts to enhance innate immune responses is crucial in improving ruminant productivity and health.

For this Special Issue, we invite original research papers and reviews exploring the use of phytogenic feed additives or plant extracts to improve ruminant productivity and health. We welcome submissions that focus on enhancing animal productivity and innate immune responses and reducing inflammation responses. Specific topics of interest include the interplay between feed additives and gut and mammary gland health in ruminant animals in vivo and the molecular mechanisms behind the use of novel plant extracts to reduce proinflammation responses in the rumen and gut epithelium in vitro.

Topics of interest include, but are not limited to, the following:

  • Improving ruminant productivity by altering feeding methods;
  • The impact of bioactive feed additives on ruminant health (including molecular mechanism research);
  • Changes in the gut microbiota of ruminants and effective measures to alleviate methane emissions;
  • The interplay between feed additives and gut and mammary gland health in ruminant animals in vivo;
  • Influences on the immune response, oxidative stress, and overall animal health;
  • The use of novel plant extracts to study molecular mechanisms to reduce proinflammation responses in the rumen and gut epithelium in vitro;
  • In vitro and in vivo studies, as well as meta-analyses and modelling approaches.

Dr. Maocheng Jiang
Dr. Sijia Liu
Prof. Dr. Jianbo Cheng
Guest Editors

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. Animals is an international peer-reviewed open access semimonthly 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 2400 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

  • phytochemicals
  • feed additives
  • animal nutrition
  • antioxidation
  • rumen fermentation
  • sustainable livestock production

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Published Papers (1 paper)

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Research

17 pages, 392 KiB  
Article
The Effects of Fermenting Psophocarpus tetragonolobus Tubers with Candida tropicalis KKU20 as a Soybean Meal Replacement Using an In Vitro Gas Technique
by Thiraphat Surakhai, Chanon Suntara, Pachara Srichompoo, Metha Wanapat, Sompong Chankaew and Anusorn Cherdthong
Animals 2025, 15(16), 2328; https://doi.org/10.3390/ani15162328 - 8 Aug 2025
Abstract
This study evaluated the effects of replacing soybean meal (SBM) with winged bean tuber (Psophocarpus tetragonolobus) fermented using ruminal Candida tropicalis KKU20 on gas kinetics, ruminal fermentation, and degradability using the in vitro gas production technique. A 3 × 4 factorial [...] Read more.
This study evaluated the effects of replacing soybean meal (SBM) with winged bean tuber (Psophocarpus tetragonolobus) fermented using ruminal Candida tropicalis KKU20 on gas kinetics, ruminal fermentation, and degradability using the in vitro gas production technique. A 3 × 4 factorial arrangement in a completely randomized design was used. Factor A included three roughage-to-concentrate (R:C) ratios: 60:40, 50:50, and 40:60. Factor B consisted of four levels of SBM replacement with yeast-fermented winged bean tuber (YFWBT): 0%, 33%, 66%, and 100%. Fermentation with C. tropicalis KKU20 increased the crude protein content of winged bean tuber by 13.32%. No significant interaction was found between the R:C ratio and YFWBT level for cumulative gas production at 24, 48, or 96 h (p > 0.05). Cumulative gas production at 96 h was not affected by either factor. However, at 24 and 48 h, gas production increased with higher proportions of concentrate (p < 0.05). Both the R:C ratio and YFWBT level significantly influenced pH and ammonia–nitrogen (NH3-N) concentrations (p < 0.01). After 24 h, NH3-N ranged from 7.66 to 13.76 mg/dL, rising to 16.44–16.63 mg/dL after 48 h. A significant interaction (p < 0.01) was observed for in vitro dry matter degradability (IVDMD) and in vitro organic matter degradability (IVOMD). Increasing concentrate levels along with YFWBT inclusion improved degradability at both incubation times. The highest IVDMD (64.49%) and IVOMD (65.81%) were recorded at 48 h in the 40:60 R:C ratio with 33% YFWBT. At 48 h, a significant interaction effect (p < 0.05) was also found for total volatile fatty acid (VFA) and propionic acid (C3) concentrations. Total VFA peaked in the 40:60 group with 33% YFWBT (104.31 mM), while the highest C3 concentration (26.22%) was observed in the same R:C group with 66% YFWBT. At 24 h, total VFA was significantly affected by the R:C ratio (p < 0.05), with the lowest values in the 60:40 group and increasing in response to higher concentrate and YFWBT levels. Incorporating YFWBT at 33% in diets with an R:C ratio of 40:60 optimized degradability, indicating its potential as a sustainable alternative to SBM in ruminant nutrition. Full article
(This article belongs to the Special Issue Phytochemicals and Feed Additives in Ruminant Nutrition: Effects on Health, Microbiota, and Methane Emissions)
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