níveis de lisina digestível e zinco quelato sobre os parâmetros produtivos de poedeiras marrons digestible lysine and zinc chelate levels on the production variables of brown laying hens

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2010
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Abstract
Objetivou-se avaliar a produção de ovos em galinhas Isa Brown alimentadas com dietas com diferentes níveis de lisina digestível e zinco quelato. Utilizaram-se 720 poedeiras marrons, em dois períodos de avaliação, de 24 a 36 e de 48 a 60 semanas de idade. As dietas foram avaliadas em delineamento inteiramente casualizado, em esquema fatorial 5 × 3, composto de 5 níveis de lisina digestível (0,482; 0,527; 0,582; 0,644 e 0,732%) e 3 de zinco quelato (20, 40 e 80 ppm), de modo que cada combinação foi testada em 6 repetições de 8 aves por unidade experimental. Na fase de 24 a 36 semanas de idade, houve influência da interação de lisina digestível e zinco no consumo médio diário de ração e na porcentagem de postura. Na fase de 48 a 60 semanas, a interação foi evidenciada somente no consumo médio diário de ração. O aumento da concentração de lisina digestível favoreceu o consumo de ração em todos os níveis de zinco. Em ambas as fases, a menor concentração de zinco atende às necessidades de produção das aves. O valor médio estimado de lisina digestível ideal foi de 0,732% para a fase de 24 a 36 semanas e de 0,578% para a fase de 48 a 60 semanas de idade.
This work aimed at evaluating egg production in Isa Brown hens fed diets with different levels of digestible lysine and chelate zinc. It was used 720 brown laying hens, in two evaluation periods, from 24 to 36 and from 48 to 60 weeks of age. The diets were evaluated in a completely randomized design in a 5 × 3 factorial scheme composed of five levels of digestible lysine (0.482; 0.527; 0.582; 0.644 and 0.732%) and three levels of chelate zinc (20, 40 and 80 ppm), so each combination was tested in 6 repetitions of 8 birds per experimental unit. In the phase from 24 to 36 weeks of age, there was an influence of digestible lysine and zinc on average feed intake of the ration and on laying percentage. During the phase from 48 to 60 weeks of age, the interaction was evidenced only on the average feed intake. The increase of digestible lysine concentration favored feed intake at all zinc levels. In both phases, the lowest zinc concentration meets poultry production needs. The estimated average value of ideal digestible lysine was 0.732% for the phase from 24 to 36 weeks of age and 0.578% for phase from 48 to 60 weeks of age.
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pacheco2010revistanveis Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Bruna Helena Carvalho Pacheco;Messias Alves da Trindade Neto;Ricardo de Albuquerque;Eliana Aparecida Schammass
Journal european journal of lipid science and technology
Year 2010
DOI
10.1590/S1516-35982010001100018
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100018
Keywords
performance mineral requirement

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