Utilize este identificador para referenciar este registo: http://hdl.handle.net/10348/2617
Título: Níveis de cálcio e granulometria de calcário na dieta de poedeiras comerciais sobre a qualidade de ovos, sangue e tíbia
Autor: Pelicia, K.
Mourão, José Luís
Garcia, E.A.
Pinheiro, Victor
Molino, A.B.
Berto, D.A.
Faitarone, A. B.
Vercese, F.
Silva, A.P.
Palavras-chave: Egg production
Mineral nutrition
Particle size
Data: 2011
Resumo: A total of 405 23-week-old ISA Brown layers were distributed in a completely randomized experimental design in a factorial arrangement with nine treatments consisting of three dietary calcium levels (3.5, 3.75, and 4.5%) and three limestone particle sizes (100% fine limestone (FL), 70% FL + 30% coarse limestone (CL) and 50% (FL) + 50% (CL)), with nine replicates of five birds per cage. The following parameters were evaluated: percentage of lay, defective eggs, egg weight, egg mass, feed intake, feed conversion ratio (per kg eggs and per dozen eggs), and mortality. Dietary Ca levels significantly affected lay, with birds fed diets containing 4.5% calcium producing less eggs compared to those fed 3.0 and 3.75% Ca. Egg production linearly decreased as dietary Ca levels increased, but blood Ca levels (mg/L) increased in 28-week-old birds. The interaction of dietary Ca levels and limestone particle sizes resulted in a reduction in tibial ash Ca content dietary Ca levels increased and as fine limestone was replaced by coarse limestone. It is concluded that a dietary Ca level of 3.75% and 100% fine particle limestone are required to maintain adequate egg production and available Ca blood level.
Revisão por Pares: yes
URI: http://hdl.handle.net/10348/2617
Tipo de Documento: Artigo
Aparece nas colecções:OLD - DZOO - Artigo em Revista Científica Internacional

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
25 - ARTIGO EM REVISTA CIENTÍFICA DO SCI.pdf
  Restricted Access
530,08 kBAdobe PDFVer/Abrir Request a copy


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex mendeley Endnote Logotipo do DeGóis Logotipo do Orcid 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.