Digestible lysine and organic zinc for male broiler from 1 to 11 days of age: performance and body composition

Revista Brasileira de Zootecnia

Messias Alves Da Trindade Neto²  Lilian Bernadete Namazu¹  Estela Kobashigawa²  Paula Takeara¹  Daniella Carolina Zanardo Donato¹  Ricardo De Albuquerque¹ 

[1] ,USP FMVZ Departamento de Nutrição e Produção Animal daPirassununga SP ,Brasil

关键词: amino acid;    nutrient deposition;    nutrition;    requirement;    zinc;    aminoácido;    deposição de nutrientes;    exigência;    nutrição;    zinco;   

DOI  :  10.1590/S1516-35982011000300019

来源: SciELO

【 摘 要 】

This study evaluated levels of digestible lysine and organic zinc for male Ross strain broilers from 1 to 11 days of age. It was used 1,050 chicks distributed in randomized block design, in 5 × 2 factorial scheme, with seven repetitions of 15 birds per experimental unit. The dietary concentrations of digestible lysine were 0.90; 1.00; 1.10; 1.20; and 1.40% combined with 43 and 253 ppm zinc chelate. The diets contained 2,965 ± 18 kcal/kg of apparent metabolizable energy (AME) and 21.48 ± 0.18% of CP. It was determined chemical composition, protein, lipid, mineral and water depositions on carcass and empty body. There was no interaction among the factors digestible lysine and organic zinc. Effect of zinc concentration increase was observed on greatest deposition of body fat, indicating that there is interference in lipid metabolism of the birds in the studied phase. The most pronounced effects resulted from the dietary inclusion of lysine. There was a linear effect on reconstituted body weight as a response to the increase of dietary lysine, which suggests equal or superior requirement to the greatest studied level. However, the deposition of water and protein on the carcass had a quadratic increase, characterizing higher muscle mass accumulation up to the levels 1.25 and 1.27 of this amino acid in the diet. Considering the studied strain, broiler chickens from the first to the 11th days of age require 1.28 ± 0.01% of digestible lysine, according to the deposition of muscle mass.

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