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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: 25 April 2025 | Viewed by 5006

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

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Published Papers (4 papers)

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Research

14 pages, 283 KiB  
Article
Effect of High-Tannin and -Polyphenol Plant Material Supplement on Rumen Fermentation, Nitrogen Partitioning and Nutrient Utilization in Beef Cattle
by Pichad Khejornsart, Theerayut Juntanam, Pongsatorn Gunun, Nirawan Gunun and Anusorn Cherdthong
Animals 2024, 14(21), 3092; https://doi.org/10.3390/ani14213092 - 26 Oct 2024
Viewed by 798
Abstract
The current issue of ruminant methane emissions is still being researched by animal nutritionists in an effort to find new approaches. In this study, five beef cattle were randomly assigned in a 5 × 5 Latin square design to examine the effects of [...] Read more.
The current issue of ruminant methane emissions is still being researched by animal nutritionists in an effort to find new approaches. In this study, five beef cattle were randomly assigned in a 5 × 5 Latin square design to examine the effects of supplementation with high-tannin and -polyphenol plant materials on nutrient utilization, rumen fermentation, and nitrogen partitioning. Cattle offered total mixed ration (TMR) silage diets with or without tannin-rich tree leaf or plant herbs, such as Piper sarmentosum Roxb., Cymbopogon citratus (DC.) Stapf, Anacardium occidentale L., and Careya arborea Roxb., were supplemented at a dose of 10 g/d. Prior to TMR feeding, the animals’ meals were supplemented with 10 g of fortified plant materials twice a day, along with 100 g of rice bran. The animals in the control group received only 100 g of rice bran and no other plant materials. The result showed that there was no difference in nutrient intake or digestibility between the supplemented and control groups. Although the effect of ruminal pH, NH3-N, Total VFA, acetate (C2), and butyrate (C4) was not significant (p > 0.05), the proportion of propionate (C3) tended to increase with supplementation (p = 0.07). There was no difference in the excretion of purine derivatives or the amount of microbial nitrogen supply, even though supplemented animals had significantly lower protozoal populations than the control group (p < 0.05). Moreover, when A. occidentale or C. arborea was added to the TMR silage diet, the nitrogen intake and retention increased considerably, although total nitrogen excretion decreased. In this approach, the leaves of Anacardium occidentale L. and Careya arborea Roxb. were particularly promising for strategic supplementation. Full article
(This article belongs to the Special Issue Recent Advances in Nutrition, Management and Health of Feedlot Cattle and Lambs)
10 pages, 1232 KiB  
Article
Energy and Protein Requirements of Growing Lambs in Colombian Highlands
by Yesid Avellaneda, Edgar Mancipe, Juan Vargas and Diego Manriquez
Animals 2024, 14(14), 2117; https://doi.org/10.3390/ani14142117 - 20 Jul 2024
Viewed by 835
Abstract
Determining the nutritional requirements of lambs is necessary to formulate balanced rations and contribute to sustainable sheep production systems. However, limited information is available regarding the nutritional requirements of growing lambs in the Colombian highlands. Twenty-two Romney Marsh males were used. Initially, four [...] Read more.
Determining the nutritional requirements of lambs is necessary to formulate balanced rations and contribute to sustainable sheep production systems. However, limited information is available regarding the nutritional requirements of growing lambs in the Colombian highlands. Twenty-two Romney Marsh males were used. Initially, four lambs were slaughtered at 20 kg body weight (BW). The remaining 18 lambs were distributed into two groups, according to BW (light: 20 BW and heavy: 30 kg BW). Lambs were randomly allocated into one of three different nutritional schemes, according to voluntary intake (no restriction, and 25 and 50% restriction). All the animals received a totally mixed ration. When a voluntary-fed lamb gained 10 kg BW, the two other lambs restricted to 25 and 50% were slaughtered and dissected into components to determine protein and gross energy concentration. Energy and protein accumulation were analyzed through regression analysis. The net energy for maintenance was 82.3 kcal/kg BW0.75, while the energy efficiencies for maintenance and gain were 0.72 and 0.29, respectively. Crude protein for maintenance was 1.78 g/kg BW0.75, and the nitrogen efficiencies for maintenance and gain were 0.41 and 0.27, respectively. The maintenance requirement of energy was greater, while protein was similarly related to values reported in the literature; however, the efficiency of energy and protein use was lower in growing lambs. These results suggested that estimating energy and nitrogen requirements for growing lambs must be adjusted in Colombian highland conditions. 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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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 937
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 1125
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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