Recent Advances in Ruminant Nutrition and Feed Efficiency

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Animal Science".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 4008

Special Issue Editors


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Guest Editor
Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Centro de Investigación El Nus, San Roque, Antioquia 053030, Colombia
Interests: cattle nutrition; interaction of microorganism and rumen fermentation; methane emissions; supplementation

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Guest Editor
Animal Science Departament, School of Agrarial and Veterinarian Sciences, Jaboticabal 14884-900, SP, Brazil
Interests: aminoacid profile and nitrogen efficiency; modulators of rumen fermentation; nutrients metabolism; ruminal microbiota; methane emissions; performance

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Guest Editor
Animal Science Departament, School of Agrarial and Veterinarian Sciences, Jaboticabal, Sao Paulo 14884-900, Brazil
Interests: beef cattle production; grassland science; greenhouse gas emissions; sustainability; supplementation
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Special Issue Information

Dear Colleagues,

Ruminants are valuable because of their ability to transform extensive renewable resources from rangeland, pasture, crop residues, or other by-products into food edible for humans. However, due to projections of human population growth, there is an increasing demand for milk and meat, complemented by the pressure to increase productivity and reduce the impact that ruminant livestock systems have on the environment. Thus, several ruminant nutrition strategies are needed to modulate fermentation, improve the feed efficiency, and mitigate the greenhouse gas emissions of these systems.

In this context, for this Special Issue, we invite the submission of relevant contributions on the recent advances in ruminant nutrition strategies to improve the efficiency of production in ruminant livestock species such as cattle, buffaloes, sheep, and goats. This Special Issue will cover original research articles and reviews on how nutrition modulation interacts with the feed efficiency in ruminants and reduces greenhouse gas emissions.

Prof. Dr. Yury T. Granja-Salcedo
Prof. Dr. Juliana Duarte Messana
Prof. Dr. Ricardo Andrade Reis
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. Life 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 2600 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

  • amino acid profile
  • feed additives
  • feed efficiency
  • grazing management
  • methane emissions
  • nitrogen metabolism
  • nutrient digestibility
  • rumen fermentation
  • ruminal microbiota
  • supplementation strategies

Published Papers (2 papers)

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Research

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16 pages, 331 KiB  
Article
Efficiency of Amino Acid Utilization in Nellore Cattle Grazing Low-Quality Forage Supplemented with Different Sources of Nitrogen
by Ana Veronica Lino Dias, Juliana Duarte Messana, Yury Tatiana Granja-Salcedo, Yeison Fabian Murilo Alfonso, Lorrayny Galoro Silva, Karine Dalla Vecchia Camargo, Kênia Larissa Gomes Carvalho Alves, Paloma Helena Gonçalves, Ricardo Andrade Reis and Telma Teresinha Berchielli
Life 2023, 13(8), 1622; https://doi.org/10.3390/life13081622 - 25 Jul 2023
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Abstract
This study aimed to evaluate the effects of supplementation with non-protein nitrogen (NPN) or ruminal undegradable protein (RUP) on intake, digestibility, and amino acid (AA) use efficiency of Nellore cattle grazing during the dry season. Eight Nellore steers (12 ± 2 months old) [...] Read more.
This study aimed to evaluate the effects of supplementation with non-protein nitrogen (NPN) or ruminal undegradable protein (RUP) on intake, digestibility, and amino acid (AA) use efficiency of Nellore cattle grazing during the dry season. Eight Nellore steers (12 ± 2 months old) were used in quadruplicate Latin squares (2 × 2). The animals were placed on Urochloa brizantha cv. Xaraés under continuous grazing. The treatments included the following: (1) urea supplementation (NPN) and (2) supplementation of corn gluten meal 60 (CGM, RUP). Animals supplemented with CGM showed higher intakes of dry matter (DM) supplement, total AA, essential AA, and individual AA. The supplementation did not affect the total AA digestibility, total AA flux, and the AA fluxes of microbial origin and RUP from the diet (p > 0.05). The ruminal microorganism origin flux of total AA to the duodenum was 44.5% and 52.7% for animals supplemented with NPN and CGM, respectively. Animals supplemented with CGM showed an increase in blood concentrations of isoleucine (+19.09 μmol/L), cystine (+27.29 μmol/L), and albumin (+0.11 g/dL) (p < 0.05), but this increase was not accompanied by an improvement in N use efficiency of steers (p > 0.05). RUP supplementation via CGM can be an efficient nutritional strategy to enhance the intake and absorption of AA by Nellore cattle grazing low-quality forage during the dry season. Full article
(This article belongs to the Special Issue Recent Advances in Ruminant Nutrition and Feed Efficiency)

Review

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10 pages, 474 KiB  
Review
Residual Feed Intake as an Efficiency Metric for Pre-Weaning Dairy Calves: What Do We Know?
by Camila S. da Silva, Juliana M. Leão, Camila F. A. Lage, Sandra G. Coelho and Mariana M. Campos
Life 2023, 13(8), 1727; https://doi.org/10.3390/life13081727 - 11 Aug 2023
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Abstract
Dairy cattle systems have targeted improvements in feed efficiency by selecting animals that can convert less feed into more products. Residual feed intake (RFI) has been the index of choice when selecting dairy cattle for feed efficiency. Nonetheless, RFI studies have focused on [...] Read more.
Dairy cattle systems have targeted improvements in feed efficiency by selecting animals that can convert less feed into more products. Residual feed intake (RFI) has been the index of choice when selecting dairy cattle for feed efficiency. Nonetheless, RFI studies have focused on lactating cows, and the crucial importance of pre-weaning efficiency on farm profitability and cow productivity has been mostly neglected. This review discusses the current knowledge of how RFI divergence relates to nutrient metabolism in pre-weaning dairy calves, including the advantages and limitations of evaluating RFI in this phase. Existing literature indicates that nutrient utilization, energy metabolism, protein metabolism, vitamin metabolism, intestinal development, and hindgut bacterial populations may be implicated in RFI divergence between pre-weaning calves. Techniques developed to date to evaluate RFI in this phase are still evolving to better adapt to the unique characteristics of this phase, and more research is needed to fill in the gaps in our current understanding of early-life feed efficiency divergence in cattle. However, current results suggest great potential for selecting high-efficiency calves while in pre-weaning to accelerate the progress of genetic selection in dairy cattle. Full article
(This article belongs to the Special Issue Recent Advances in Ruminant Nutrition and Feed Efficiency)
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