Níveis de metionina + cistina para frangos de corte de 1 a 21 e 22 a 42 dias de idade

Albino, Luiz Fernando Teixeira; Silva, Shirley Helena Mendes da; Junior, José Geraldo de Vargas; Rostagno, Horácio Santiago; Silva, Martinho de Almeida e

doi:10.1590/s1516-35981999000300012

Cited by 24 publications

(31 citation statements)

References 12 publications

(8 reference statements)

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“…The lowest performance that was observed in the birds that were supplemented with PHI is likely related to the imbalance of amino acids in the diet (Albino et al, 1999). This imbalance was caused by a deficiency of methionine and indicates that the additional source (PHI) was not enough to meet the amino acid requirements.…”

Section: Resultsmentioning

confidence: 97%

Bioavailability of different methionine sources for broilers from 1 to 21 days old

et al. 2015

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. 2015. Bioavailability of different methionine sources for broilers from 1 to 21 days old. Cien. Inv. Agr. 42(1): 35-43. This trial aimed to evaluate the bioavailability of DL-2-hydroxy-4-(methyl) butanoic acid (DL-HMBA) and a poly-herbal ingredient (PHI) in relation to DL-methionine (DLM) on broilers. A sample of 1100 broiler chickens of the Cobb 500 strain, both male and female, were fed either a basal diet without industrial methionine supplementation or a basal diet that was supplemented with three DL-HMBA levels (0.170, 0.340, and 0.511%) or three DLM levels (0.111, 0.221, and 0.332%) in an amount equivalent to 65% of the respective DL-HMBA levels (on a product weight basis) and three levels of PHI (0.111, 0.221, and 0.332%) in amounts equivalent to the used DLM levels from 1 to 21 days of age. The simultaneous linear regression analysis (slope ratio) revealed a relative bioavailability of DL-HMBA of 39% compared to that of DLM for weight gain and 44% for feed conversion. However, the performance data from birds that were supplemented with PHI did not significantly adjust to simultaneous regression designs; therefore, it was not possible to determine the PHI bioavailability in relation to the DLM. Considering together all of the studied parameters, the relative bioavailability of DL-HMBA was 42% compared to the DLM on a product basis.

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Section: Resultsmentioning

confidence: 97%

Bioavailability of different methionine sources for broilers from 1 to 21 days old

et al. 2015

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“…Essa resposta corrobora os estudos de Albino et al (1999), que trabalharam com frangos de corte na mesma fase, alimentados com dietas contendo 21,0% de proteína bruta e 3.000 kcal de EM/kg e observaram desempenhos inferiores nas aves alimentadas com ração contendo níveis de metionina + cistina abaixo de 0,90%, provavelmente como conseqüência do desequilíbrio de aminoácidos. Quando os níveis de metionina + cistina ultrapassaram 0,96%, houve redução no ganho de peso, contrariando os relatos de Han & Baker (1993) de que o excesso de metionina + cistina na ração não influenciou negativamente os resultados de ganho de peso de frangos de corte no período de 1 a 21 dias de idade.…”

Section: Resultsunclassified

“…Não houve efeito significativo (P>0,05) dos níveis de metionina + cistina sobre o consumo de ração, o que está de acordo com os dados reportados por Albino et al (1999) e Silva (1996), que utilizaram diferentes níveis de metionina + cistina em rações com 19 e 20% de proteína bruta, respecTabela 3 -Desempenho produtivo de frangos de corte submetidos a diferentes níveis de met + cis (%) no período de 1 a 21 dias de idade Figura 2 -Efeito dos níveis de met + cis (%) sobre a conversão alimentar das aves no período de 1 a 21 dias de idade. …”

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“…A estimativa da exigência para ganho de peso ficou acima do nível de 0,80% encontrado por Albino et al (1999), ao estudarem o efeito de níveis de metionina + cistina, para frangos de corte fêmeas da marca comercial Ross no período de 22 a 42 dias de idade. Rodrigueiro et al (2000) observaram efeito linear para ganho de peso e sugeriram mínimo de 0,93% de metionina + cistina na ração.…”

Section: Níveis De Met + Cis (%)unclassified

“…Atencio et al (2004) afirmam que é recomendável manter uma relação entre os aminoácidos para se evitar a perda energética da dieta, como conseqüência do desbalanceamento entre os aminoácidos. Albino et al (1999) relataram que os aminoácidos da ração são utilizados pelas aves para inúmeras funções, como constituintes primários dos tecidos estruturais e de proteção, como pele, penas, matriz óssea, ligamentos, tecidos dos órgãos e músculos, além de serem precursores de inúmeros constituintes corporais não-protéicos.…”

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Exigências de metionina + cistina para frangos de corte fêmeas de 1 a 21 e de 22 a 42 dias de idade criados em região de clima tropical

et al. 2006

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RESUMO -Foram realizados dois experimentos para se estudar a exigência de metionina + cistina para frangos de corte fêmeas da marca comercial Ross, nas fases de 1 a 21 e de 22 a 42 dias de idade, criados em região de clima tropical. Os parâmetros avaliados foram o consumo de ração, o ganho de peso, a conversão alimentar, os pesos absolutos e os rendimentos de cortes nobres (peito, coxas e sobrecoxas) e de gordura abdominal. O delineamento experimental adotado foi o inteiramente casualizado, com seis níveis de metionina + cistina, quatro repetições e 12 animais por unidade experimental, totalizando 288 aves em cada experimento. As dietas foram calculadas para atender às exigências nutricionais das aves, exceto quanto aos níveis de metionina + cistina. As dietas foram suplementadas com DL-metionina nos níveis de 0; 0,08; 0,16; 0,24; 0,32 e 0,40%, resultando em rações com 0,69; 0,77; 0,85; 0,93; 1,01 e 1,09% de metionina + cistina, para o período de 1 a 21 dias, e 0,61; 0,69; 0,77; 0,85; 0,93 e 1,01% de metionina + cistina, para o período de 22 a 42 dias de idade. Os níveis de metionina + cistina influenciaram de forma quadrática o ganho de peso e a conversão alimentar (no período de 1 a 21 dias) e de forma linear o ganho de peso, a conversão alimentar, os pesos absolutos de gordura abdominal, carcaça, peito, coxas e sobrecoxas e os rendimentos de carcaça e gordura abdominal (período de 22 a 42 dias de idade). As exigências nutricionais de metionina + cistina para frangos de corte fêmeas da marca comercial Ross foram estimadas em 0,96% para os períodos de 1 a 21 e 22 a 42 dias de idade.Palavras-chave: exigência nutricional, frango de corte, metionina + cistina Requirements of methionine + cystine for female broilers chickens from 1 to 21 and 22 to 42 days old on tropical climate region ABSTRACT -Two trials were conducted to determine the requirement of methionine + cistyne for Ross female broilers from 1 to 21 and 22 to 42 days old on tropical climate region. The following parameters were evaluated: feed intake, weight gain, feed: gain ratio, absolute weights and yields of noble cuts (breast, thighs and drumsticks) and abdominal fat. The experiment was analyzed as a complete randomized design with six levels of methionine + cystineand four replicates of 12 birds per replicate, in a total of 288 birds for each experiment. The diets were formulated to meet the bird nutricional requirements, except for methionine + cystine levels. The diets were supplemented with DL-methionine at levels of 0, 0.08, 0.16, 0.24, 0.32, and 0.40% to contain 0.69, 0.77, 0.85, 0.93, 1.01, and 1.09% of methionine + cystine, for the period from 1 to 21 days and 0.61; 0.69; 0.77; 0.85; 0.93 and 1,01% of methionine + cystine, for the period from 22 to 42 days old. Quadractic effect of levels of methionine + cistyne on weight gain and feed: gain ratio, from 1 to 21 days old, and linear effect on weight gain, feed: gain ratio, absolute weights of abdominal fat, carcass, breast, thighs, and drumsticks and yields of carcass and abdominal fat, from ...

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Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers

Farkhoy

Modirsanei

Ghavidel

et al. 2012

Veterinary Medicine International

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Four experiments were conducted, in two stages, to evaluate protein and limiting amino acids' (lysine and methionine + cystine) levels in pre-starter diets on broilers' performance. In each experiment of Stage 1, 640 new-born male Ross 308 cockerels were randomly allocated to eight dietary treatments with a 2 × 4 factorial arrangement. In experiment 1-1, two levels of crude protein (CP: 21% and 23.2%) and four levels of Lys (1.2, 1.3, 1.4, and 1.5%) and in experiment 1-2, two levels of CP (21 and 23.2%) and four levels of Met + Cys (0.85, 0.90, 0.95, and 1.00%) were used. In Stage 2, the optimum levels of Lys and Met + Cys obtained from Stage 1 (1.3 and 1.5% Lys, 0.90 and 1.00% Met + Cys in experiment 1-1 and 1-2, resp.) with two levels of CP (21 and 23.2%) were used in two separate simultaneous experiments with a 2 × 2 factorial arrangement for male and female birds. The levels of CP significantly influenced BWG and FCR in experiment 1-1. Dietary levels of Lys affect BWG (experiment 1-1) and FI (experiments 1-1 and 2-1) significantly. In experiments 1-2 and 2-2, the different levels of Met + Cys did not affect BWG, FI, and FCR of male or female broilers. The results of these experiments indicated that the optimal level of dietary protein and Lys were 23.2% and 1.5%, respectively. Diets with 1% Met + Cys caused optimal performance.

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Níveis de metionina + cistina para frangos de corte de 1 a 21 e 22 a 42 dias de idade

Cited by 24 publications

References 12 publications

Bioavailability of different methionine sources for broilers from 1 to 21 days old

Bioavailability of different methionine sources for broilers from 1 to 21 days old

Exigências de metionina + cistina para frangos de corte fêmeas de 1 a 21 e de 22 a 42 dias de idade criados em região de clima tropical

Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers

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