Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers
Joint Authors
Modirsanei, Mehrdad
Ghavidel, Omid
Farkhoy, Mohsen
Jafarnejad, Sadegh
Sadegh, Majid
Source
Veterinary Medicine International
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-29
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Four experiments were conducted, in two stages, to evaluate protein and limiting amino acids' (lysine and methionine + cystine) levels in pre-starter diets on broilers’ performance.
In each experiment of Stage 1, 640 new-born male Ross 308 cockerels were randomly allocated to eight dietary treatments with a 2 × 4 factorial arrangement.
In experiment 1-1, two levels of crude protein (CP: 21% and 23.2%) and four levels of Lys (1.2, 1.3, 1.4, and 1.5%) and in experiment 1-2, two levels of CP (21 and 23.2%) and four levels of Met + Cys (0.85, 0.90, 0.95, and 1.00%) were used.
In Stage 2, the optimum levels of Lys and Met + Cys obtained from Stage 1 (1.3 and 1.5% Lys, 0.90 and 1.00% Met + Cys in experiment 1-1 and 1-2, resp.) with two levels of CP (21 and 23.2%) were used in two separate simultaneous experiments with a 2 × 2 factorial arrangement for male and female birds.
The levels of CP significantly influenced BWG and FCR in experiment 1-1.
Dietary levels of Lys affect BWG (experiment 1-1) and FI (experiments 1-1 and 2-1) significantly.
In experiments 1-2 and 2-2, the different levels of Met + Cys did not affect BWG, FI, and FCR of male or female broilers.
The results of these experiments indicated that the optimal level of dietary protein and Lys were 23.2% and 1.5%, respectively.
Diets with 1% Met + Cys caused optimal performance.
American Psychological Association (APA)
Farkhoy, Mohsen& Modirsanei, Mehrdad& Ghavidel, Omid& Sadegh, Majid& Jafarnejad, Sadegh. 2012. Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers. Veterinary Medicine International،Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-468659
Modern Language Association (MLA)
Farkhoy, Mohsen…[et al.]. Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers. Veterinary Medicine International No. 2012 (2012), pp.1-7.
https://search.emarefa.net/detail/BIM-468659
American Medical Association (AMA)
Farkhoy, Mohsen& Modirsanei, Mehrdad& Ghavidel, Omid& Sadegh, Majid& Jafarnejad, Sadegh. Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers. Veterinary Medicine International. 2012. Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-468659
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-468659