Níveis de lisina digestível em rações para poedeiras no período de 24 a 40 semanas de idade

Rocha, Tatiana Cristina da; Gomes, Paulo Cézar; Donzele, Juarez Lopes; Barreto, Sergio Luiz de Toledo; Mello, Heloisa Helena de Carvalho; Brumano, Gladstone

doi:10.1590/s1516-35982009000900012

Cited by 23 publications

(31 citation statements)

References 7 publications

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“…These results are contrary to those results found by Cupertino et al (2009) and Rocha et al (2009) who verified an increase of the feed intake with an increased lysine level in the diet.…”

Section: Resultscontrasting

confidence: 99%

“…These results are similar to those obtained by Rocha et al (2009), who reported no effects of lysine levels in these measurements of egg components. Likewise, Gomes and Angeles (2009) verified no effects of the same measurements with increased digestible threonine levels in the diet.…”

Section: Resultssupporting

confidence: 92%

“…The summarized performance measurement results showed that the data of this study are similar to those found by Rocha et al (2009) and Silva et al, (2010), for lysine requirements that indicated 0.770 and 0.780% of digestible lysine to maximize performance requirements for white-laying hens.…”

Section: Resultssupporting

confidence: 88%

“…Recent studies, under these conditions, have shown that the lysine requirement for actual laying hens is between 760 and 790mg per day; from 0.76 to 0.79% in diet, based on a 100 gram per bird intake (Cupertino et al, 2009;Rocha et al, 2009;Silva et al, 2010).…”

mentioning

confidence: 99%

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Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Figueiredo¹,

Bertechini

Fassani

et al. 2012

Arq. Bras. Med. Vet. Zootec.

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The present study was developed using 864 Hy-Line W36 laying hens (42 to 58 weeks of age) with a randomized experimental design in a 4x3 factorial arrangement, with five replicates and 12 birds per experimental unit and 4 evaluation periods of 28 days each. The digestible lysine levels studied were 0.675%, 0.743%, 0.811% and 0.879%, and the digestible threonine levels were 0.542%, 0.596% and 0.650%. The performance and egg quality was evaluated. There were no significant effects on the egg production, specific gravity, albumen and yolk percentage and total solids in albumen and yolk for birds submitted to the different dietary digestible lysine and threonine levels. There was significant interaction between these amino acids on the egg shell percentage and Haugh unit in fresh eggs. There was a decreasing linear effect on the feed intake with increase of digestible lysine level. Egg weight, egg mass and feed conversion demonstrated a quadratic effect with the increase of the digestible lysine level with the best results in the diets with 0.754, 0.772 and 0.795% of digestible lysine, respectively. 0,754; 0,772 e 0,795%, poedeiras, proteína bruta, unidade Haugh

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“…These results are contrary to those results found by Cupertino et al (2009) and Rocha et al (2009) who verified an increase of the feed intake with an increased lysine level in the diet.…”

Section: Resultscontrasting

confidence: 99%

Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 88%

mentioning

confidence: 99%

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Performance and egg quality of laying hens fed with dietary levels of digestible lysine and threonine

Figueiredo¹,

Bertechini

Fassani

et al. 2012

Arq. Bras. Med. Vet. Zootec.

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“…Amino acid requirements of commercial layers have been extensively researched, because currently it is a common practice to calculate diets based on amino acid recommendations, ideal protein standard, amino acid digestibility and costs of feeding (Rocha et al, 2009). Incorrect diet formulations may cause deficiencies and/or excess depending on the variability of amino acid digestibility.…”

Section: Introductionmentioning

confidence: 99%

<b>Glutamic acid supplementation on low protein diets for laying hens

Bezerra

Costa

Givisiez

et al. 2015

Acta Sci. Anim. Sci.

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ABSTRACT. With the objective of evaluating the effect of reducing crude protein (CP) and L-glutamic acid supplementation, Dekalb Brown laying hens with 34 weeks of age. The birds were distributed in six treatments in a completely randomized design, eight replications of eight birds. The control diet contained 17% CP. The second and third treatments had CP reduced by 1.5 and 3.0 percentage points (pp) of CP in relation to the control diet, respectively. In the fourth treatment, was added the same amount of glutamate of the control diet (2.982%), and the last two treatments was added 1 and 2 pp of glutamate in relation to control diet (3.982 and 4.98%), respectively. The treatment with 15.17% CP + 0.341% L-glutamic acid (T4) promoted higher egg production, and the control diet showed greater egg weight than others treatments. There was no significant effect on the variables on quality of eggs. The T4 presented values of excreted nitrogen similar to the others treatments, with lower concentration of uric acid than the control diet and lower cost in the production. In conclusion, it is recommended the treatment with 15.17% CP + 0.341% L-glutamic acid for Brown laying hens with 34 weeks of age.Keywords: egg production, nitrogen, performance, uric acid.Ácido glutâmico suplementado em dietas de baixa proteína para poedeiras semipesadas RESUMO. Com o objetivo de avaliar o efeito da redução da proteína bruta (PB) e suplementação de L-glutamato em poedeiras da linhagem Dekalb Brown com 34 semanas de idade, as aves foram distribuídas em seis tratamentos em um delineamento experimental inteiramente casualizado com oito repetições. A dieta controle continha 17% PB. Os segundo e terceiro tratamentos tinham redução de 1,5 e 3,0 pontos percentuais (pp) de PB em relação à dieta controle, respectivamente. No quarto tratamento, foi adicionada a mesma quantidade de glutamato da dieta controle (2,982%), e nos dois últimos tratamentos foram adicionados 1 e 2 pp de glutamato em relação à dieta controle (3,982 e 4,98%), respectivamente. O tratamento com 15,17% CP + 0,341% L-glutâmico (T4) promoveu maior produção de ovos, e a ração controle apresentou maior peso de ovos do que os outros tratamentos. Não houve efeito significativo sobre as variáveis relativas à qualidade dos ovos. O T4 apresentou valores de nitrogênio excretado semelhante aos demais tratamentos, com menor concentração de ácido úrico que a dieta controle e menor custo na produção. Em conclusão, recomenda-se o tratamento com 15,17% PB + 0,341% de ácido L-glutâmico para poedeiras semipesadas com 34 semanas de idade.Palavras-chave: produção de ovos, nitrogênio, desempenho, ácido úrico.

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