Calcium effect in bone and egg quality of the hens

Autor: K.F.G. Cardoso, Luiz Carlos Vulcano, I. C. L. Almeida Paz, Ariel Antonio Mendes, S. E. Takahashi, Edivaldo Antonio Garcia, I. C. L. Almeida, Claudia Marie Komiyama, Adriano Wagner Ballarin, Marleide da Costa Silva, Augusto Balog
Přispěvatelé: Universidade Estadual Paulista (Unesp)
Rok vydání: 2009
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Archivos de Zootecnia v.58 n.222 2009
SciELO España. Revistas Científicas Españolas de Ciencias de la Salud
instname
ISSN: 0004-0592
DOI: 10.4321/s0004-05922009000200002
Popis: EnglishThe experiment was carried out, with hens of the Shaver Brown strain in production, during 27 weeks. The objective was to evaluate the mobilization of bone calcium and phosphorus for the formation of the shell eggs, as well as to follow the variations in the bone quality along the production cycle. 64 birds had been used. The experimental desing was entirely randomized with two treatments (calcium percentage in the diet) and four repetitions of eight birds each. The used diets were isoproteic and isoenergetic adequate (3.8%) and low (1.8%) calcium levels. Analysis of bone (tibiae and femurs) mineral density (DMO) were done at 16, 22, 28, 34 and 40 weeks of age were developed. After each radiographic collection, 4 birds/treatment, were abated for the analysis of bone resistance (RO), Seedor index (IS), dry matter (MS), total mineral (MIN) and calcium and phosphorus (Ca and P). The values of egg production, production of egg mass and quality of the egg shell were also evaluated. It was possible to conclude that the birds mobilized bone minerals for the egg production, independently of the treatment and the birds receiving diets with low levels of calcium had the quality of the eggs shell damaged. portuguesUm experimento foi realizado com duracao de 27 semanas, com poedeiras da linhagem Shaver Brown em producao, seu objetivo foi avaliar a mobilizacao de calcio e fosforo osseos para a formacao da casca dos ovos, assim como, acompanhar as variacoes na qualidade ossea ao longo do ciclo de producao. Foram utilizadas 64 aves. O delineamento experimental foi o inteiramente casualizado com dois tratamentos (porcentagem de calcio na dieta) e quatro repeticoes de oito aves cada. As dietas utilizadas foram isoproteicas e isocaloricas, com niveis adequados (3,8%) e baixos (1,8%) de calcio. Realizaram-se analises densidade mineral ossea (DMO) das tibias e femures as 16, 22, 28, 34 e 40 semanas de idade. Apos cada coleta radiografica 4 aves por tratamento, foi abatida para realizacao de analise de resistencia ossea (RO), indice Seedor (IS), teor de materia seca (MS), teor de minerais totais (MIN) e os teores de calcio e fosforo (Ca e P). Os valores de producao de ovos, producao de massa de ovos e qualidade da casca tambem foram avaliados. Foi possivel concluir que as aves mobilizaram minerais osseos para a producao de ovos, independentemente do tratamento e que as aves que receberam dietas com niveis baixos de calcio tiveram a qualidade das cascas dos ovos prejudicadas.
Databáze: OpenAIRE
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