| Revista: | Revista Brasileira de Zootecnia |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000445534 |
| ISSN: | 1516-3598 |
| Autores: | Viana, Eduardo de Faria1 Souza, Wesley José de1 Costa, Miliane Alves da2 Arnhold, Emmanuel2 Carvalho, Fabyola Barros de2 Mello, Heloisa Helena de Carvalho2 Café, Marcos Barcellos2 Stringhini, José Henrique2 |
| Instituciones: | 1Instituto Federal Goiano, Urutai, Goias. Brasil 2Universidade Federal de Goias, Escola de Veterinaria e Zootecnia, Goiania, Goias. Brasil |
| Año: | 2020 |
| Volumen: | 49 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | An experiment was conducted aiming to evaluate the effect of different levels of crude protein, based on the ideal protein concept and two rearing systems, on productive performance of brown laying hens. A total of 400 Hisex Brown laying hens between 30 and 45 weeks of age were distributed in a completely randomized design and a 2×4 factorial arrangement, with main effects including two rearing systems (cage and floor) and levels of crude protein (140, 150, 160, and 180 g kg−1), totalizing eight treatments. Five replicates with 10 birds each were used per experimental unit. The following parameters were evaluated: egg production, feed intake, body weight gain, feed conversion ratio, and quality traits such as dirty, cracked, or broken eggs. No interaction effect was observed between dietary protein levels and rearing systems for body weight gain, feed intake, egg production, egg weight, and feed conversion ratio. Feed intake and egg production were higher in the floor rearing system. Feed conversion ratio (kg/dz) was improved in birds reared in the cage system. The rate of cracked and broken eggs was higher in the cage system. The layers reared in the floor system produced a higher percentage of dirty eggs. The dietary protein level did not affect the evaluated parameters. Thus, we conclude that a floor rearing system is an option for layers, and the dietary protein level can be reduced up to 140 g kg−1 for Hisex Brown hens from 30 to 45 weeks of age |
| Disciplinas: | Medicina veterinaria y zootecnia |
| Palabras clave: | Aves de corral, Nutrición animal, Proteínas, Calidad del huevo |
| Keyword: | Poultry, Animal nutrition, Proteins, Egg quality |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
