| Grant number: | 11/04313-8 |
| Support type: | Scholarships in Brazil - Master |
| Effective date (Start): | August 01, 2011 |
| Effective date (End): | September 30, 2012 |
| Field of knowledge: | Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding |
| Principal Investigator: | Nilva Kazue Sakomura |
| Grantee: | Juliano César de Paula Dorigam |
| Home Institution: | Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil |
| Associated research grant: | 08/50557-3 - Models to estimate amino acids requirements for broilers, laying type pullets and laying hens, AP.TEM |
Abstract The aim of this project is to estimate the optimum ratio of essential amino acids for broilers, male, Cobb 500® based on the maximum potential for protein deposition (NDmaxT) and age. The experiment will be divided into two stages. At each step, will be conducted three tests, one for each period (6 to 21, 22 to 37, 38 to 53 days). Each bird will be housed in a metabolic cage and each test will last 15 days (five of adaptation and 10 collection). The first step will be determined NDmaxT and nitrogen requirement for maintenance (NMR). Each test uses 42 birds, distributed in a completely randomized design with seven treatments and six replications. The treatments will be seven diets with different levels of nitrogen made by dilution technique. In the second stage will determine the ideal ratio of amino acids. In each experiment 54 birds will be used, distributed in a completely randomized design with nine treatments and six replications. The treatments will be a positive control diet, negative control and seven test diets deficient in amino acid (lysine, methionine + cystine, threonine, tryptophan, isoleucine, valine and arginine). The positive control diet meet the ideal proposed by Rostagno et al. (2005), and negative control diet will be formulated by the dilution technique and will meet 70% amino acid requirement tests. The other treatments are obtained by the technique of deletion consisting of the negative control diet supplemented with synthetic amino acids to 100%, except the amino acid test. The relationship between the estimated efficiency of utilization (bc-1) for each amino acid is used to determine the ideal ratio. Statistical analysis of data will be performed in SAS 9.1 software. (AU) | |