We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Digestible lysine levels for laying hens and their effects on egg quality.
- Authors
Santos, Tiago Antônio dos; Geraldo, Adriano; Machado, Luiz Carlos; Pelícia, Kléber; Simão, Sérgio Domingos; Vieira Filho, Javer Alves
- Abstract
Egg quality of semi-heavy laying hens fed on low protein diets (14.0% CP) and on different lysine levels is evaluated, while maintaining the same ratio of digestible amino acids / digestible lysine. Four hundred and twenty commercial strain Isa Brown laying hens, 28 weeks old, were divided into 42 experimental plots. A completely randomized design with six treatments and seven replicates was employed in four production cycles of 28 days each. Treatments comprised Control - 16.92% CP; 0.750% digestible lysine. Treatments 1 to 5, with CP levels 14% and digestible lysine levels 0.600, 0.675, 0.750, 0.825 and 0.900% respectively. Levels of Treatments 1 and 2 (0.546 and 0.640% digestible Met + Cys / 0.600 and 0.675% digestible lysine) provided smaller egg size. On the other hand, eggs had higher shell percentage when compared to control diet. When compared to other digestible amino acids, digestible lysine requirement may be estimated at 0.750% in a diet with 14% CP, which corresponds to the average daily intake of 876 mg dig. lysine hen-1 day-1 and 798 mg dig. Met + Cys hen-1 day-1, without jeopardizing performance and eggs' internal and external quality.
- Subjects
LYSINE; DIGESTION; HENS; EGG quality; PROTEINS in animal nutrition; DIETARY supplements; AMINO acids
- Publication
Acta Scientiarum: Animal Sciences, 2014, Vol 36, Issue 1, p41
- ISSN
1806-2636
- Publication type
Article
- DOI
10.4025/actascianimsci.v36i1.21823