Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

Abstract

This study aimed to assess the effect of stocking density of 10, 12, 14, and 16 birds m −2 on performance, carcass and cut yields, productivity, and bone development of broiler chickens Cobb 500 ® . The experimental design was completely randomized design with four treatments (stocking densities) and four replications. The assessments were performed weekly at 1, 7, 14, 21, 28, 35, and 42 days. The best live weight result was found at a density of 10 birds m −2 in the period from 1 to 7 days. No effect of density was observed on feed intake and weight gain. From 1 to 14 days, the best live weights were found at densities of 10, 12, and 14 birds m . In the period from 1 to 21 days, live weight and weight gain were higher at densities of 10, 12, and 14 birds m . A difference (P < 0.05) was observed for live weight, weight gain, and feed intake of animals reared at densities of 10, 12, and 14 birds m −2 for the phases from 1 to 35 days and the total phase from 1 to 42 days of bird age when compared to 16 birds m −2 , which presented lower performance. However, feed conversion of 1-7, 1-14, 1-21, 1-35, and 1-42 days and carcass and cut characteristics showed no significant differences for all treatments. On the other hand, productivity was higher in the treatments with 14 and 16 birds m −2 , but without difference between each other. No interaction (P>0.05) was observed between stocking density and age for the assessed bone parameters. Similarly, no difference (P>0.05) was observed for bone development of broiler chickens reared at different stocking densities for the studied parameters. Thus, the increased density of 10 or 12 birds m −2 to 14 birds m −2 has no influence on zootechnical performance, carcass and cut yields, and bone development, but increases broiler chicken productivity reared in a conventional shed without air conditioning.

Efeito Da Sexagem No Desempenho E Características De Carcaça De Frangos De Corte Ross 308

“…According to the evaluations, the Seedor index increased over time, reaching the highest index at 42 days. These same data corroborate with Henrique et al (2017), who stated that bone length and weight gain tend to increase over time. Male broilers had higher production cost when compared to mixed and female lots (Table 11).…”

Impacts of Stocking Density on Broiler Chicken Performance Stress Reaction and Mortality in Broiler Chicken

“…(2014) reared chickens under the stocking densities of 0.100 and 0.067 m 2 /bird on a deep litter system and showed a significantly lower feed conversion ratio in low stocking density group. Adeyemo et al (2016) reported significantly decreased FCR with high stocking densities, while Henrique et al (2017) did not find a significant effect of stocking density on FCR during the last week of the experiment.…”

Desempenho De Frangos De Corte Criados Sobre Dois Tipos De Cama E Duas Densidades

“…As melhorias nas instalações e nos equipamentos na avicultura brasileira, contribuíram para o crescimento da produção de frangos de corte, pois, os produtores passaram a aumentar a quantidade de aves alojadas por metros quadrados. No entanto, para esses que avanços ocorram, as condições do ambiente, no qual, as aves estão submetidas é importante, para que consigam expressar seu máximo desempenho (GOPINGER et al, 2015;HENRIQUE et al, 2017).…”

“…Assim, a densidade de criação tem o objetivo de aumentar a produção de carne por metros quadrados, com a finalidade de obter um maior lucro no final da produção. Todavia, maiores densidades, podem piorar o desempenho e reduzir a qualidade da cama, devido as maiores quantidades de excrementos, ocasionando compactação, decorrente do aumento da umidade, o que pode intensificar o surgimento de lesões na carcaça (HENRIQUE et al, 2017).…”