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Recent Advances in Nutrition, Management and Health of Feedlot Cattle...
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Recent Advances in Nutrition, Management and Health of Feedlot Cattle and Lambs

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

Deadline for manuscript submissions: 15 August 2024 | Viewed by 1513

Special Issue Editors

Dr. Alejandro Plascencia

E-Mail Website
Guest Editor
Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Sinaloa, Culiacan 80260, Mexico
Interests: feedlot; growth-performance; digestion; fermentation; energetics; feed evaluation
Prof. Dr. Richard Avery Zinn

E-Mail Website
Guest Editor
Department of Animal Science, University of California, Davis, CA 95616, USA
Interests: nutrition, health, and management of feedlot cattle
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Feedlot growth performance is a complex function of nutrition (including diet acceptability and feeding management), environmental conditions, animal management, and animal health and welfare. In this Special Issue, we welcome research articles as well as review papers focusing on the following areas: (1) diet formulation, feed processing, and feeding management practices for enhancement of growth performance and health; (2) mitigation of adverse environmental factors (including animal management systems); (3) management practices that promote animal health and wellbeing; and (4) mitigation of ruminal methane production. A list of relevant keywords is given below.

Dr. Alejandro Plascencia
Prof. Dr. Richard Avery Zinn
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

  • feedlot cattle
  • feedlot lambs
  • ruminants
  • diet formulation
  • feeding management
  • feedlot management systems
  • alternative feeds
  • feed additives
  • environmental stressors
  • health management
  • ruminal methane generation mitigation
  • growth
  • dietary energy efficiency

Published Papers (2 papers)

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Research

18 pages, 2956 KiB  
Article
Effects of Zilpaterol Hydrochloride with a Combination of Vitamin D3 on Feedlot Lambs: Growth Performance, Dietary Energetics, Carcass Traits, and Meat Quality
by Karla H. Leyva-Medina, Horacio Dávila-Ramos, Jesús J. Portillo-Loera, Omar S. Acuña-Meléndez, Adriana Cervantes-Noriega, Jaime N. Sánchez-Pérez, Gamaliel Molina-Gámez, Javier G. Rodríguez-Carpena, Mario A. Mejía-Delgadillo and Juan C. Robles-Estrada
Animals 2024, 14(9), 1303; https://doi.org/10.3390/ani14091303 - 26 Apr 2024
Viewed by 356
Abstract
This study evaluated the impact of supplementing ZH in combination with D3 on the growth performance, energy efficiency, carcass traits, and meat quality of feedlot lambs. Thirty-two Dorper × Katahdin cross lambs (37.3 ± 5.72 kg) were utilized in a 29 d experiment [...] Read more.
This study evaluated the impact of supplementing ZH in combination with D3 on the growth performance, energy efficiency, carcass traits, and meat quality of feedlot lambs. Thirty-two Dorper × Katahdin cross lambs (37.3 ± 5.72 kg) were utilized in a 29 d experiment in a completely randomized block design with a 2 × 2 factorial structure consisting of two levels of ZH for 26 d (0 and 0.20 mg/kg PV−1) and two levels of D3 for 7 d (0 and 1.5 × 106 IU/d−1). ZH improved (p ≤ 0.05) the average daily gain (ADG) and feed efficiency by 9.9% and 17.8%, respectively, as well as hot carcass weight (HCW) and dressing carcass by 4.3% and 2.6%, respectively. (p ≤ 0.03). However, ZH increased (p < 0.01) muscle pH and Warner–Bratzler shear force (WBSF) (2.5 and 23.0%, respectively). D3 supplementation negatively affected (p ≤ 0.02) dry matter intake (DMI) (last 7 d) and ADG by 15.7% and 18.1%. On the other hand, D3 improved the pH of the longissimus thoracis muscle by 1.7% (p = 0.03) without affecting WBSF. When D3 was supplemented in combination with ZH, it was observed that meat quality was improved by reducing muscle pH compared to lambs treated only with ZH. However, D3 did not improve the meat tenderness negatively affected by ZH supplementation. Full article
(This article belongs to the Special Issue Recent Advances in Nutrition, Management and Health of Feedlot Cattle and Lambs)
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13 pages, 293 KiB  
Article
Evaluation of Increasing Dietary Concentrations of a Multi-Enzyme Complex in Feedlot Lambs’ Rations
by Germán David Mendoza-Martínez, Pedro Abel Hernández-García, Cesar Díaz-Galván, Pablo Benjamín Razo-Ortiz, Juan José Ojeda-Carrasco, Nalley Sánchez-López and María Eugenia de la Torre-Hernández
Animals 2024, 14(8), 1215; https://doi.org/10.3390/ani14081215 - 18 Apr 2024
Viewed by 562
Abstract
The objective of this study was to evaluate the effects of increasing levels of the M-E complex (xylanase, glucanase, cellulase, and invertase) Optimax E® on the performance of growing lambs, their digestibility, and their rumen microbiota, and to estimate NEm, NEg, and [...] Read more.
The objective of this study was to evaluate the effects of increasing levels of the M-E complex (xylanase, glucanase, cellulase, and invertase) Optimax E® on the performance of growing lambs, their digestibility, and their rumen microbiota, and to estimate NEm, NEg, and ruminal methane levels. Forty lambs (Katahdin x Dorset; 22.91 ± 4.16 kg) were randomly assigned to dietary concentrations of ME (0, 0.2, 0.4, and 0.8% DM) and fed individually for 77 days. Increasing M-E improved feed conversion (p < 0.05) as well as NEm and NEg (p < 0.05), which were associated with increased in vivo DM and NDF digestion (linear and quadratic p < 0.01). Few microbial families showed abundancy changes (Erysipelotrichaceae, Christensenellaceae, Lentisphaerae, and Clostridial Family XIII); however, the dominant phylum Bacteroidetes was linearly reduced, while Firmicutes increased (p < 0.01), resulting in a greater Firmicutes-to-Bacteroidetes ratio. Total Entodinium showed a quadratic response (p < 0.10), increasing its abundancy as the enzyme dose was augmented. The daily emission intensity of methane (per kg of DMI or AGD) was reduced linearly (p < 0.01). In conclusion, adding the M-E complex Optimax E® to growing lambs’ diets improves their productive performance by acting synergistically with the rumen microbiota, modifying the Firmicutes-to-Bacteroidetes ratio toward more efficient fermentation, and shows the potential to reduce the intensity of greenhouse gas emissions from lambs. Full article
(This article belongs to the Special Issue Recent Advances in Nutrition, Management and Health of Feedlot Cattle and Lambs)
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