Efeito da densidade de alojamento sobre o desempenho, rendimento de carcaça e parâmetros sanguíneos de frangos
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2020-08-28
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Universidade Federal de Goiás
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The objective was to evaluate four different stocking densities on performance of broilers, uniformity, well-being and broiler carcass yield. For this purpose, an experiment was carried out using 1242 day-old male chicks of the Cobb500™ strain, with an average body initial weight of 48.4 grams, the experimental design was entirely randomized with four treatments and nine replications, with a total of 36 experimental units. The treatments were four different stocking densities square meters, 10.41 birds / m²; 11.45 birds / m²; 12.50 birds / m² and 13.54 birds / m². Performance, a growth rate according to age and uniformity, carcass yield and commercial parts, levels of cortisol, lactate, total protein, albumin, glucose, triglycerides, cholesterol, uric acid and blood count were taxed. The quality of the bed was evaluated for moisture content, temperature and ammonia emission level. The feed intake, body weight gain, live weight and feed conversion were evaluated weekly. At 42 days, 72 birds (18 per treatment/ two per replication) were slaughtered to assess carcass yield and commercial cuts. The increase in density promoted greater production of body weight / m² of shed. However, it did not affect the performance and yield of carcass and commercial parts at 42 days of age. There was no influence of treatments on the growth uniformity of the flock, nor did it influence the variables related to stress (cortisol, glucose, lactate and albumin) in chickens. It was concluded that the stocking densities of 13.54 birds / m² produced 47.23 kg / m² and can be used in the rearing of male chickens, raised from one to 42 days old, in negative pressure industrial sheds, without damage to the performance, carcass yield, bed quality and welfare quality.
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PINHEIRO, A. L. Efeito da densidade de alojamento sobre o desempenho, rendimento de carcaça e parâmetros sanguíneos de frangos. 2020. 82 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2020.