SciELO - Scientific Electronic Library Online

 
vol.19 special issueEffect of Sorghum Based Nutritional Programs on Performance, Carcass Yield and Composition of Breast in BroilersEffect of Feeding Conditions on the Methylation Status of Fatp1 Gene in Chicken Breast Muscle author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Brazilian Journal of Poultry Science

Print version ISSN 1516-635XOn-line version ISSN 1806-9061

Abstract

REIS, RS et al. Digestible Methionine + Cysteine-to-Lysine Ideal Ratio for Meat-Type Quails at Initial Phase. Rev. Bras. Cienc. Avic. [online]. 2017, vol.19, n.spe, pp.51-54. ISSN 1806-9061.  http://dx.doi.org/10.1590/1806-9061-2016-0352.

This trial was performed to determine the ideal ratio of digestible methionine + cysteine (Met/Lys) with digestible lysine for meat-type quails from 1 to 14 days of age. A total of six hundred thirty, one-day-old, not sexed meat type quails were randomly assigned to six groups of treatments, each one with seven replicates and fifteen quails per experimental unit. A basal diet, methionine + cysteine-deficient, was graded supplemented with DL-Methionine (0.108; 0.169; 0.230; 0.291; 0.352 and 0.413%) to obtain the treatments, represented by six digestible Met/Lys ratios (0.60; 0.65; 0.70; 0.75; 0.80 and 0.85). Data was analyzed using ANOVA and polynomial regression and broken-line models were used to estimate the digestible Met/Lys ideal ratio, considering adjust of data to both models. Statistical significance was considered when p≤0.05. Feed intake, weight gain and final body weight was linearly increased as dig. Met/Lys ratio increased. Feeding conversion was improved with increasing in dig. Met/Lys ratios. A quadratic response on feathering percentage was observed with increasing dig. Met/Lys ratios. Digestible Met/Lys ratio which, maximized feathering percentage in meat-type quails, was 0.74. According to linear broken-line model, dig. Met/Lys ratio estimated for optimum feed intake, weight gain, final body weight and feeding conversion were, respectively, 0.66; 0.71; 0.71 and 0.74. The dig. Met/Lys ideal ratio for meat-type quails from one to 14 days of age is 0.74.

Keywords : Coturnix coturnix coturnix; digestible amino acids; Sulphur amino acids.

        · text in English     · English ( pdf )