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Animals
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Amino Acid Nutrition in Poultry
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Amino Acid Nutrition in Poultry

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

Deadline for manuscript submissions: 31 October 2024 | Viewed by 1655

Special Issue Editor

Dr. Csaba Szabó

E-Mail Website
Guest Editor
Department of Animal Nutrition and Physiology, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Böszörményi Street 138, 4032 Debrecen, Hungary
Interests: pig; poultry; equine; nutrition

Special Issue Information

Dear Colleagues,

The application of amino acids in poultry diets has a history that reaches back more than 70 years. The original reason for this was to reduce dietary crude protein content, which is still an aim. Due to a variety of reasons, numerous countries are making efforts to reduce the dependence on imported protein sources and reduce the environmental impacts of animal farming. However, this goal can be achieved with the knowledge of digestible amino acid requirement of birds and the content of feedstuffs, and the effect of low-CP diets on that. The industrial production of various amino acids has led to much wider opportunities to increase our knowledge. Moreover, not has only the effect of production been considered, but our information is increasing regarding to the physiological effects of amino acids. The introduction of and research into in ovo feeding has also opened new horizons. The aims of this Special Issue are to gather research in the field of amino acid nutrition of poultry and provide insights into the current directions of research. 

We invite researchers to submit original research papers or reviews that address the effects of amino acids on the performance and metabolism of poultry. Topics may include poultry performance, quality of animal products, metabolism, and in ovo feeding and its long term consequences.

Dr. Csaba Szabó
Guest Editor

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

  • amino acid
  • protein
  • poultry
  • metabolism
  • in ovo

Published Papers (2 papers)

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Research

13 pages, 233 KiB  
Article
Estimation of Protein and Amino Acid Requirements in Layer Chicks Depending on Dynamic Model
by Miao Liu, Zhi-Yuan Xia, Hong-Lin Li, Yu-Xuan Huang, Alainaa Refaie, Zhang-Chao Deng and Lv-Hui Sun
Animals 2024, 14(5), 764; https://0-doi-org.brum.beds.ac.uk/10.3390/ani14050764 - 29 Feb 2024
Viewed by 616
Abstract
Four trials were conducted to establish a protein and amino acid requirement model for layer chicks over 0–6 weeks by using the analytical factorization method. In trial 1, a total of 90 one-day-old Jing Tint 6 chicks with similar body weight were selected [...] Read more.
Four trials were conducted to establish a protein and amino acid requirement model for layer chicks over 0–6 weeks by using the analytical factorization method. In trial 1, a total of 90 one-day-old Jing Tint 6 chicks with similar body weight were selected to determine the growth curve, carcass and feather protein deposition, and amino acid patterns of carcass and feather proteins. In trials 2 and 3, 24 seven-day-old and 24 thirty-five-day-old Jing Tint 6 chicks were selected to determine the protein maintenance requirements, amino acid pattern, and net protein utilization rate. In trial 4, 24 ten-day-old and 24 thirty-eight-day-old Jing Tint 6 chicks were selected to determine the standard terminal ileal digestibility of amino acids. The chicks were fed either a corn–soybean basal diet, a low nitrogen diet, or a nitrogen-free diet throughout the different trials. The Gompertz equation showed that there is a functional relationship between body weight and age, described as BWt(g) = 2669.317 × exp(−4.337 × exp(−0.019t)). Integration of the test results gave a comprehensive dynamic model equation that could accurately calculate the weekly protein and amino acid requirements of the layer chicks. By applying the model, it was found that the protein requirements for Jing Tint 6 chicks during the 6-week period were 21.15, 20.54, 18.26, 18.77, 17.79, and 16.51, respectively. The model-predicted amino acid requirements for Jing Tint 6 chicks during the 6-week period were as follows: Aspartic acid (0.992–1.284), Threonine (0.601–0.750), Serine (0.984–1.542), Glutamic acid (1.661–1.925), Glycine (0.992–1.227), Alanine (0.909–0.961), Valine (0.773–1.121), Cystine (0.843–1.347), Methionine (0.210–0.267), Isoleucine (0.590–0.715), Leucine (0.977–1.208), Tyrosine (0.362–0.504), Phenylalanine (0.584–0.786), Histidine (0.169–0.250), Lysine (0.3999–0.500), Arginine (0.824–1.147), Proline (1.114–1.684), and Tryptophan (0.063–0.098). In conclusion, this study constructed a dynamic model for the protein and amino acid requirements of Jing Tint 6 chicks during the brooding period, providing an important insight to improve precise feeding for layer chicks through this dynamic model calculation. Full article
(This article belongs to the Special Issue Amino Acid Nutrition in Poultry)
14 pages, 496 KiB  
Article
The Response to Dietary Leucine in Laying Lens
by Nilva Kazue Sakomura, Matheus Reis, Lucas Pimentel Bonagurio, Bruno Balbino Leme, Gabriel Silva Viana, Mirella Cunha Melaré and Robert Mervyn Gous
Animals 2023, 13(16), 2659; https://0-doi-org.brum.beds.ac.uk/10.3390/ani13162659 - 18 Aug 2023
Viewed by 722
Abstract
This study aimed to estimate the standardized ileal digestible leucine intake (SID-Leui, mg) in laying hens for maintenance, and to describe the response in laying hens to SID-Leui, thereby providing the information required to determine the optimum economic intake [...] Read more.
This study aimed to estimate the standardized ileal digestible leucine intake (SID-Leui, mg) in laying hens for maintenance, and to describe the response in laying hens to SID-Leui, thereby providing the information required to determine the optimum economic intake of SID-Leu for laying hens. Two nitrogen balance series, one balanced and the other unbalanced with respect to leucine (Leu), were used to estimate the SID-Leu requirement for maintenance using 36 roosters per series. The roosters were randomly distributed among the six levels of Leu with each level being replicated six times. The six diets were formulated to contain 0.0, 3.5, 6.9, 10.4, 13.9, or 17.4 g/kg of SID-Leu for the unbalanced series and 0.0, 4.0, 8.0, 12.0, 16.0, or 20.0 g/kg of SID-Leu for the balanced series. The SID-Leui maintenance requirement was calculated as 144 mg/bird d, 66 mg/kg d, 74 mg/kg0.75d or 395 mg/BPm0.73d. For the response trial, 120 individually caged laying hens (63 weeks old) were randomly distributed among eight treatments with 15 replicates. To estimate the SID-Leui for the population of hens, the Reading Model was fitted to the data using body weight (BW, kg), SID-Leui and egg output (EO, g). The Reading Model calculated the mg SID-Leui = 11.6 EOmax + 43.4 BW. The efficiency of SID-Leu utilization for laying hens was estimated to be 79%. Full article
(This article belongs to the Special Issue Amino Acid Nutrition in Poultry)
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