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Animals
Special Issues
Nutrients and Feed Additives in Ruminants
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Nutrients and Feed Additives in Ruminants

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

Deadline for manuscript submissions: 30 October 2024 | Viewed by 2103

Special Issue Editors

Dr. Uchenna Y. Anele

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Guest Editor
Department of Animal Sciences, College of Agriculture and Environmental Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA
Interests: feed additives; feed evaluation; exogenous enzymes; greenhouse gas emissions; gut health and function; integrated crop-livestock systems; nutraceuticals; rumen fermentation; rumen microbiome; ruminants; metabolomics
Special Issues, Collections and Topics in MDPI journals
Dr. Lydia K. Olagunju

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Guest Editor
Department of Animal Sciences, College of Agriculture and Environmental Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA
Interests: feed additives; feed evaluation; exogenous enzymes; greenhouse gas emissions; gut health and function; plant nutraceuticals; rumen fermentation; rumen microbiome; ruminants
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ruminant production plays a critical role in food security worldwide. Sufficient levels of nutrients are necessary to meet requirements for maintenance, growth and lactation and thus guarantee animal well-being and performance. Feed additives have continued to play a significant role in diverse areas of animal production. This has expanded the intensity and scope of research into additive effects on dry matter intake, feed efficiency, metabolome, immune function, and the gut health of ruminant animals. However, inconsistent results have limited the use of several feed additives, thereby necessitating further research in order to validate results of research on animal species, product activity, application rate, product composition, stage of life, mode and time of delivery, ruminal activity, compound stability, and product–feed specificity.

This Issue will focus on research that can provide solutions to current and emerging challenges in the development of novel feed additives around the world.

You may choose our Joint Special Issue in Ruminants.

Dr. Uchenna Y. Anele
Dr. Lydia K. Olagunju
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

  • cattle
  • feed additives
  • feed evaluation
  • goat
  • greenhouse gases
  • gut health
  • nutrient metabolism
  • sheep
  • sustainability

Published Papers (3 papers)

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Research

13 pages, 1078 KiB  
Article
Supplementation of Methionine Dipeptide Enhances the Milking Performance of Lactating Dairy Cows
by Xiaoshi Wei, Ning Han and Hongyun Liu
Animals 2024, 14(9), 1339; https://doi.org/10.3390/ani14091339 - 29 Apr 2024
Viewed by 438
Abstract
Methionine dipeptide (Met-Met) could improve milk protein synthesis in bovine epithelia mammary cells and lactating mice, while the effects of Met-Met on lactation performance, rumen fermentation and microbiota profile in lactating dairy cows have not been explored. For this reason, 60 Chinese lactating [...] Read more.
Methionine dipeptide (Met-Met) could improve milk protein synthesis in bovine epithelia mammary cells and lactating mice, while the effects of Met-Met on lactation performance, rumen fermentation and microbiota profile in lactating dairy cows have not been explored. For this reason, 60 Chinese lactating Holstein cows were allocated into three treatment groups: control group (CON), 6 g/d methionine dipeptide group (MM), and 6.12 g/d rumen-protected methionine dipeptide group (RPMM). The experiment lasted for 10 weeks to monitor lactation performance, plasma amino acid profile and rumen fermentation parameters and microbiota profile. Results showed that MM increased the energy-corrected milk (ECM), and RPMM increased both milk yield and ECM (p < 0.05). The milk protein concentration and yield were increased by MM and RPMM (p < 0.05). The rumen fermentation showed that RPMM increased total volatile fatty acids, acetate and valerate concentrations (p < 0.05). The relative abundance of Firmicutes, including Succiniclasticum, Selenomonas and Clostridium_XlVa, were enriched and the Prevotella was decreased by RPMM (p < 0.05). In summary, daily supplementing with 6 g of MM or RPMM in lactating dairy cows could improve milk yield and both percentage and yield of milk protein, and RPMM benefited the rumen fermentation and altered the bacterial composition. These results provided the first evidence that Met-Met supplementation can improve lactation performance of dairy cows. Full article
(This article belongs to the Special Issue Nutrients and Feed Additives in Ruminants)
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14 pages, 284 KiB  
Article
Effect of Calcareous Marine Algae Buffer on High-Producing Dairy Cows during Peak Lactation
by Radko Loučka, Václav Jambor, Hana Synková, Petr Homolka, Dana Kumprechtová, Veronika Koukolová, Petra Kubelková, Alena Výborná, Yvona Tyrolová and Filip Jančík
Animals 2024, 14(6), 897; https://doi.org/10.3390/ani14060897 - 14 Mar 2024
Viewed by 555
Abstract
The aim of the study was to investigate the effect of calcareous marine algae (Lithotamium calcareum)-based rumen content buffer (CMA) included in concentrated feed within total mixed ration (TMR), fed to 34 peak lactation (87–144 days in milk) Holstein dairy cows, [...] Read more.
The aim of the study was to investigate the effect of calcareous marine algae (Lithotamium calcareum)-based rumen content buffer (CMA) included in concentrated feed within total mixed ration (TMR), fed to 34 peak lactation (87–144 days in milk) Holstein dairy cows, randomized into two groups (group A, n = 17; group B, n = 17), wearing collars with accelerometers, and housed a in barn with automatic feed-weigh troughs. During the first phase P1, group A received TMR with CMA (TMR-E) and group B was fed TMR without the buffer (TMR-C). For P2, the treatments in the groups were exchanged. Feed intake, feeding time (FT), rumination time (RT), milk yield, milk composition, and rumen pH were measured by barn technologies, and rumen fluid and feces composition were analyzed in the laboratory. Differences between the TMR-E and TMR-C in most parameters under study were statistically insignificant, except overall FT and RT, which differed significantly between the groups. Group A, feeding at P1 by TMR-E, exhibited higher FT and RT than Group B (202 min/cow/day vs. 184 min/cow/day, and 486 min/cow/day vs. 428 min/cow/day, respectively). The RT significantly increased after switching from TMR-C to TMR-E. This implies that the buffer effect is delayed and persists after the withdrawal. In the group of cows that received control TMR without buffer in the first phase, RT and milk protein content increased significantly in the first week after the addition of buffer. Full article
(This article belongs to the Special Issue Nutrients and Feed Additives in Ruminants)
22 pages, 6490 KiB  
Article
Effects of Sophora alopecuroides in a High-Concentrate Diet on the Liver Immunity and Antioxidant Function of Lambs According to Transcriptome Analysis
by Yawen An, Hairong Wang, Aiwu Gao, Shufang Li, Jinli Yang, Boyang Li and Henan Lu
Animals 2024, 14(2), 182; https://doi.org/10.3390/ani14020182 - 5 Jan 2024
Viewed by 803
Abstract
The purpose of this study was to determine the effects of Sophora alopecuroides (SA) on liver function, liver inflammatory factor levels, antioxidant indexes and transcriptome in sheep. Twenty-four 3-month-old healthy Dumont hybrid lambs weighing 25.73 ± 2.17 kg were randomly divided into three [...] Read more.
The purpose of this study was to determine the effects of Sophora alopecuroides (SA) on liver function, liver inflammatory factor levels, antioxidant indexes and transcriptome in sheep. Twenty-four 3-month-old healthy Dumont hybrid lambs weighing 25.73 ± 2.17 kg were randomly divided into three groups: C1 (the control group), fed a concentrate-to-forage ratio of 50:50; H2 (the high-concentration group), fed a concentrate-to-forage ratio of 70:30; and S3 (the SA group), fed a concentrate-to-forage ratio of 70:30 + 0.1% SA. The results showed that the rumen pH values of the C1 and S3 groups were significant or significantly higher than that of the H2 group (p < 0.05 or p < 0.01). The serum ALT, AST and LDH activities and the LPS and LBP concentrations in the sheep serum and liver in the H2 group were significantly or extremely significantly higher than those in the C1 and S3 groups (p < 0.01), and the IL-10 content and SOD, GPX-PX and T-AOC activities showed the opposite trend (p < 0.05 or p < 0.01). KEGG enrichment analysis showed that the differentially expressed genes were significantly enriched in the ECM–receptor interaction and focal adhesion pathways, which are closely related to immune and antioxidant functions (p-adjust < 0.1). In summary, SA could improve the immune and antioxidant functions of lamb livers under high-concentrate conditions and regulate the mechanism of damage on sheep livers, which is caused by high-concentrate diets and through the expression of related genes in the ECM/FAs pathway. Full article
(This article belongs to the Special Issue Nutrients and Feed Additives in Ruminants)
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