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Author Araújo, Cs Da S. ♦ Carlos, Tcf ♦ Araújo, Lf ♦ Silva, Nvp Da ♦ Reis ♦ Barbosa, Lcgs ♦ Muramatsu, K. ♦ Marino, Ct
Source Directory of Open Access Journals (DOAJ)
Content type Text
Publisher Fundação APINCO de Ciência e Tecnologia Avícolas
File Format HTM / HTML
Date Created 2015-12-15
Copyright Year ©2014
Language English
Subject Domain (in LCC) SF1-1100 ♦ SF600-1100 ♦ QL1-991
Subject Keyword Agriculture ♦ Ideal protein ♦ Performance ♦ Science ♦ Amino acids ♦ Parts yield ♦ Animal culture ♦ Veterinary medicine ♦ Poultry production ♦ Zoology
Abstract 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<0.05) of digestible lysine levels on average body weight at 40 days of age, daily weight gain, and breast yield, and a cubic effect on feed conversion ratio and abdominal fat. There was no influence of lysine levels of daily feed intake, carcass yield, leg, or wing yields. It was concluded that digestible lysine requirements for male broilers during the evaluated period was 1.22% for performance and 1.04% for carcass yield.
ISSN 1516635X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2014-03-01
e-ISSN 1516635X
Journal Brazilian Journal of Poultry Science
Volume Number 16
Issue Number 1
Page Count 5
Starting Page 83
Ending Page 87


Source: Directory of Open Access Journals (DOAJ)