Data/hora: 13/06/2024 03:52:55

Provedor de dados: | 89
País: | Brazil
Título: | Protein, methionine+cystine and lysine levels for Japanese quails during the production phase
Autores: | Garcia,EA; Mendes,AA; Pizzolante,CC; Saldanha,ESPB; Moreira,J; Mori,C; Pavan,AC.
Data: | 2005-03-01
Ano: | 2005
Palavras-chave: | Egg production; Egg quality; Lysine; Methionine+Cystine; Protein; Quails.
Resumo: | An experiment was conducted at Faculdade de Medicina Veterinária e Zootecnia/Unesp - Botucatu for 168 days to evaluate the effects of protein, Met + Cys and lysine diet levels on egg production and egg quality of laying Japanese quails. Quails with 42 days of age were reared in a completely randomized design. There were 1,944 quails distributed in four replicates of 27 birds per pen, according to a factorial 3x3x2 with three crude protein levels (16, 18 and 20% CP), three Met + Cys levels (0.700; 0.875 and 1.050%) and two lysine levels (1.100 and 1.375%). Birds fed diets with 18 and 20% CP had higher feed intake and egg production than those fed diets with 16% CP. There was significant interaction (p&lt;0.05) between protein and Met + Cys levels on egg weight. There was no effects (p&gt;0.05) of the protein level on feed conversion per dozen eggs; however, improved feed conversion per egg mass was seen for birds fed diets with 20% CP compared to those fed diets with 16% and 18% CP. Protein and lipid percentage in the yolk increased when dietary protein level increased from 16 to 18%. Increasing Met + Cys from 0.700% to 0.875% reduced yolk protein percentage. Higher lipid percentage in the yolk was seen in eggs from quails fed diets with 1.050% Met + Cys, whereas 1.375% lysine in the diet of resulted in decreased egg production and egg mass, besides poorer feed conversion per dozen eggs and per egg mass.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100002
Editor: | Fundação APINCO de Ciência e Tecnologia Avícolas
Relação: | 10.1590/S1516-635X2005000100002
Formato: | text/html
Fonte: | Brazilian Journal of Poultry Science  v.7 n.1 2005
Fonte: | info:eu-repo/semantics/openAccess