Determinação da relação água: proteínas de cortes de frangos de diferentes linhagens alimentados com distintas densidades nutricionais e abatidos em diferentes idades

Abstract

With the European Union among the main consumers of Brazilian chicken meat, to keep the export market open and meet the demands, it is necessary to meet many requirements, among them, the amount of physiological water and water:protein ratio (W/P) present in the cuts. Thus, it was aimed to identify if lineage, nutrition and age impact in the water:protein ratio, and if these results conform to the standards of the international trade of chicken meat. It was used a randomized block design, and the treatments followed a factorial arrangement 3x3, being three nutritional densities (low, medium and high) and three lineages (Embrapa 021, and two commercial lineages A and B), being the following treatments: Embrapa 021 lineage with low nutritional density, Embrapa 021 lineage with medium nutritional density, Embrapa 021 lineage with high nutritional density, A lineage with low nutritional density, A lineage with medium nutritional density, A lineage with high nutrient density, B lineage with low nutritional density, B lineage with medium nutritional density, B lineage with high nutrient density. Five slaughters were carried out weekly from the 28 th day of age, totaling 540 animals for the determination of the water:protein ratio of breast and leg's chickens at 28, 35, 42, 49 and 56 days of age by determining the percentages of moisture and protein by the near - infrared spectroscopy method. From the results obtained with the present study, it can be concluded that lineage, nutrition and age impact the results of W/P. The results are in most cases in line with international trade standards for broiler meat, mainly in relation to export to the European Union.