ABSTRACT. The environment is very important for the performance of laying hens; thus, techniques are required to improve production systems, providing better welfare for poultry and consequent increase in the quality of the final product, the egg. This study aimed to evaluate the effects of rearing system, on the floor and in cage, on the performance and egg internal and external quality of laying hens. A total of 320 Hysex Brown laying hens, with 34-43 weeks days of age, was distributed in a completely randomized design, with two treatments, floor and cage, with 10 replicates each. The parameters evaluated were: individual feed intake, egg production per replicate, feed conversion per dozen eggs, egg weight; weight and percentage participation of shell, albumen and yolk, specific gravity, body weight variation and viability of birds. The results show that the birds raised on the floor showed best results as to egg production, besides the best internal and external quality, with greater weight of egg, yolk, albumen, shell and with lower losses of eggs. Because of the negative effects of the cage system, in general, hens presented lower results when compared to results of those raised on the floor.Keywords: laying hens, cage, egg quality, alternative system. Avaliação da produção de galinhas poedeiras criadas em diferentes sistemas em clima quente RESUMO. É de suma importância o ambiente no desempenho de galinhas poedeiras, sendo necessárias técnicas que viabilizem a melhoria dos sistemas de produção e ambiência, proporcionando bem-estar às aves e consequente incremento na qualidade do produto final, o ovo. O objetivo com este trabalho foi avaliar os efeitos do sistema de criação, em piso e gaiola sobre o desempenho e a qualidade dos ovos (interna e externa) de galinhas poedeiras. Foram utilizadas 320 galinhas poedeiras da linhagem Hysex Brown, de 34 a 43 semanas de idade, os dois tratamentos foram distribuídos em delineamento inteiramente casualizado, piso e gaiola, com 10 repetições cada. As variáveis avaliadas foram: consumo de ração individual, taxa de postura por repetição, conversão alimentar por dúzia de ovos, peso do ovo; peso e participação percentual da casca, da gema e do albúmen, gravidade específica, variação de peso corporal e viabilidade das aves. Pelos resultados foi observado que as aves criadas em piso apresentaram melhores valores de produção de ovos, além da melhor qualidade interna e externa, com maior peso do ovo, gema, albúmen e casca e com menores perdas de ovos. As aves alojadas nas gaiolas, por terem sofrido efeitos negativos do sistema de criação, apresentaram, de maneira geral, resultados inferiores quando comparado ao das aves criadas em piso.Palavras-chave: aves de postura, gaiola, qualidade do ovo, sistema alternativo.
This research was conducted to assess the compensatory gain in birds that have suffered severe food restriction and a reduced growth in its initial phase. A total of 144 birds were used in the Label Rouge lineage with average initial weight 239.90 ± 76.80 g, from 28 to 49 days. The experimental design used was a completely randomized design, where the birds were distributed in 18 boxes, containing 3 treatments and 6 replicates of 8 birds per cage. The treatments were as follows: birds with body weight of 150.73 ± 12.62 g, between weighing from 239.79 ± 13.14 g and heavy weight of 329.17 ± 24.89 g in different periods, from 28 to 35, 35 to 42 and 42 to 49 days of age, respectively. In relation to weight gain, the heavy birds, obtained better results when compared to the other. The feed consumption has changed in the three periods and, in the period of 42 to 49 days, the treatments did not differ among themselves. Feed conversion rates (p = 0.127) and feasibility (p = 0.6163) of birds do not differ in different periods.Keywords: Consumption, feed efficiency, poultry, severe restriction. ResumenEsta investigación se realizó para evaluar la ganancia compensatoria en aves que han sufrido graves restricciones alimenticias y un crecimiento reducido en su fase inicial. Se utilizó un total de 144 aves en el linaje Label Rouge con un peso inicial promedio de 239.90 ± 76.80 g, de 28 a 49 días. El diseño experimental utilizado fue el diseño completamente al azar, en el que las aves se distribuyeron en 18 cajas, con 3 tratamientos y 6 repeticiones de 8 aves por jaula. Los tratamientos fueron los siguientes: aves con peso corporal de 150.73 ± 12.62 g, entre el peso de 239.79 ± 13.14 g y peso de 329.17 ± 24.89 g en diferentes períodos, de 28 a 35, 35 a 42 y 42 a 49 días de edad, respectivamente. En relación al aumento de peso, las aves pesadas, obtuvieron mejores resultados en comparación con el otro. El consumo de alimento ha cambiado en los tres períodos y, en el período de 42 a 49 días, los tratamientos no difirieron entre sí. Los porcentajes de conversión alimenticia (p = 0.127) y de viabilidad (p = 0.6163) de las aves no difieren en diferentes períodos.Palabras clave: Consumo, eficiencia alimentaria, aves de corral, restricción severa.
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