Evaluation of different digestible lysine levels for male broilers during the period of 18 to 40 days of age

A total of 1.500 male Cobb 500 broilers were used to determine the optimal digestible lysine level for 18 to 40-day-old broilers. The experimental period started when broilers were 18 days old and had an initial average weight of 737 ± 20 g. A completely randomized experimental design was applied, w...

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Bibliographic Details
Published in:Brazilian Journal of Poultry Science 2014-03, Vol.16 (1), p.83-87
Main Authors: Carlos, TCF, Marino, CT, Silva, NVP da, Barbosa, LCGS, Reis, RN, Muramatsu, K, Araújo, CS da S, Araújo, LF
Format: Article
Language:English
Subjects:
AGRICULTURE, DAIRY & ANIMAL SCIENCE
Amino acids
ideal protein
ORNITHOLOGY
parts yield
poultry production
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Summary:A total of 1.500 male Cobb 500 broilers were used to determine the optimal digestible lysine level for 18 to 40-day-old broilers. The experimental period started when broilers were 18 days old and had an initial average weight of 737 ± 20 g. A completely randomized experimental design was applied, with five lysine levels, totaling five treatments with 10 replicates of 30 birds each. The experimental diets contained equal energy and protein levels, and 0.86, 0.95, 1.04, 1.13, and 1.22% digestible lysine. The following parameters were evaluated: average body weight at 40 days of age, daily weight gain, daily feed intake, feed conversion ratio, carcass yield and parts yield, and abdominal fat percentage. There was a quadratic effect (p
ISSN:1516-635X
1806-9061
1516-635X
DOI:10.1590/S1516-635X2014000100012