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Japanese quails response curve to methionine+cystine intake

Grant number: 15/23863-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2015
Effective date (End): July 20, 2016
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal Investigator:Nilva Kazue Sakomura
Grantee:Larissa Vargas
Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil
Associated research grant:13/25761-4 - Modeling production and nutritional requirements of poultry and fish, AP.TEM


This study aims to evaluate the response curve of Japanese Quails to the intake of methionine. Will be used 392 birds with 16 weeks of age, distributed in a completely randomized design with 8 treatments (Met + Cys levels), seven replicates and seven birds each. The experimental diets will be formulated according to the technique of dilution where a diet with high protein content and a free protein diet then diets dilutions are made possible the achievement of higher levels of digestible methionine (0.347; 0.462 ; 0.578; 0.809; 0.924; 1.040 and 1.155%). The control treatment will be added to confirm that the experimental responses are due to the limitation of methionine. This level is obtained by addition of DL-methionine in 99% more deficient level (0,347+ 116 g / kg DL-Methionine feed 99%). The supply of feed will be ad libitum and the remains will be quantified weekly. In the trial will be assessed egg production (%), egg weight (g), egg mass (g) of methionine intake (mg / bird / day) and body weight of the birds. The variables will be studied by models such as broken line (BL), quadratic (Q) and combination of both (BL + Q).