Data/hora: 08/06/2024 15:38:26

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 09/09/2015
Data da última atualização: | 25/05/2017
Autoria: | XAVIER, R. P. de S.; FREITAS, E. R.; BRAZ, N. M.; FARIAS, N. N. P.; LIMA, R. C.; WATANABE, P. H.; NASCIMENTO, G. A. J.; PEIXOTO, M. S. M.
Afiliação: | REGINA PATRÍCIA DE SOUZA XAVIER, UFCE; EDNARDO RODRIGUES FREITAS, UFCE; NÁDIA MELO BRAZ, UFCE; NADJA NAIARA PEREIRA FARIAS, UFCE; RAFFAELLA CASTRO LIMA, UFCE; PEDRO HENRIQUE WATANABE, UFCE; GERMANO AUGUSTO JERÔNIMO NASCIMENTO, UFCE; MARIA SIMONE MENDES PEIXOTO, UFCE.
Título: | Limestone particle sizes and lighting regimens on egg and bone quality of laying hens.
Ano de publicação: | 2015
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 8, p. 718-725, ago. 2015.
Idioma: | Inglês
Notas: | Título em português: Tamanhos de partícula de calcário e regimes de luz na qualidade de ovos e ossos de galinhas poedeiras.
Conteúdo: | The objective of this work was to evaluate the effect of limestone particle sizes in the diet and, of lighting regimes on the egg and bone quality and on the performance of commercial laying hens. Three hundred Hissex White layers, at 18 weeks of age, were distributed in a completely randomized design, in a 5×2 factorial arrangement (coarse limestone in the diet at 0, 25, 50, 75, and 100%; with or without artificial light), with five replicates of six birds. No significant interaction was observed between particle sizes and lighting regime for the evaluated parameters. There was no significant effect of coarse limestone level in the diet on the performance and egg quality of hens; however, bone deformity (3.23 to 4.01 mm), strength (5.19 to 6.70 kgf cm&#8209;2), and mineral matter (51.09 to 59.61%) improved as the proportion of coarse limestone increased. For lighting regime, the treatment with artificial light yielded higher Haugh unit values (87.17 vs. 85.54) than that with natural light only. Greater limestone particles improve bone quality of laying hens, and the use of artificial light can benefit the albumen quality of the eggs.
Palavras-Chave: | Massa de ovo.
Thesaurus Nal: | Egg masses; Egg shell thickness; Specific gravity.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/129246/1/Limestone-particle-sizes.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (58179-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS