Quantidade de metionina+cistina digestível para poedeiras semipesadas de 75 a 91 semanas de idade

Polese, Clauber; Nunes, Ricardo Vianna; Vilela, Christiane Garcia; Murakami, A. E.; Agustini, Márcia Antonia Bartolomeu; Takahashi, Sabrina Endo; Vilela, Valter Oshiro; Souza, Cleison de; Schneider, S.E.

doi:10.1590/s0102-09352012000600038

Cited by 7 publications

(7 citation statements)

References 9 publications

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“…The lower yield of birds fed diets formulated as recommended by Rostagno et al (2011) The different bases for diet formulation (total amino acids vs digestible amino acids) and the methionine plus cystine levels (Rostagno et al, 2011) were not able to significantly affect the feed intake of animals. The lack of significant difference (P > 0.05) in feed intake in this study corroborates the results found in other studies that evaluated the levels of methionine plus cystine for laying hens (Sá et al, 2007;Cupertino et al, 2009;Varela, 2009;Polese et al, 2012).…”

Section: Resultssupporting

confidence: 92%

“…neither by the Dunnet test, nor by linear or quadratic regression analysis (Table 3). These data corroborate previous studies in which methionine plus cystine have also not affected egg quality (Jordão Filho et al, 2006;Sá et al, 2007;Varela, 2009;Polese et al, 2012). It is possible that the dietary levels of this study were not sufficient to cause significant changes in the quality of internal and external components of eggs.…”

Section: Resultssupporting

confidence: 91%

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Methionine plus Cystine Levels for Light Laying Hens on Production Phase

Santana

Costa

Guerra

et al. 2021

RSD

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The objective of this study was to evaluate the levels of sulfur amino acids in the diets of laying hens of 34-50 weeks of age. 336 Dekalb White birds were distributed in a completely randomized design with six treatments, 14 replicates of four birds each. The diets consisted in a control treatment, formulated to meet the nutritional requirements of sulfur amino acids according to the NRC (1994) and five diets varying in methionine plus cystine level (0.536, 0.603, 0.670, 0.737, 0.804%). Performance, egg quality and histological data were evaluated. There was a significant quadratic effect for production and egg mass and mass and dozen conversion per eggs, with methionine plus cystine estimations of 0.691%, 0.689%, 0.737% and 0.730%, respectively. Methionine plus cystine levels significantly affected the histology of tissues. The level of 0.737% of digestible methionine plus cystine, with 90% of methionine plus cystine: lysine ratio, and 756.53 mg/bird/day of consumption, is recommended to light laying hens in the production phase.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 91%

Methionine plus Cystine Levels for Light Laying Hens on Production Phase

Santana

Costa

Guerra

et al. 2021

RSD

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“…An estimated level of iMetCys of 1031 mg/hen•day (Figure 3) may be necessary to attain EP greater than 80% in H&N Brown SCLH between 8 and 20 weeks of production (99-111 weeks old). This iMetCys level is higher than that recommended by Schmidt et al (2009b), Polese et al (2012), Carvalho (2012, Hy-Line (2014), and Rostagno et al (2017) to maximize EP of SCLH, who reported 786 mg/hen•day for the Lohmann Brown (79-95 weeks old) and 655 mg/hen•day for Shaver Brown (75-91 weeks old), 835 mg/hen•day for Hy-Line W-36 (79-95 weeks old), 599 mg/hen•day for Hy-Line Brown, and 858 mg/hen•day for laying-hens brown eggs with medium-superior performance in the first production cycle, respectively. Methionine + Cysteine is essential for protein synthesis and plays several roles in the body metabolism as methyl group and sulfur donor, participating in protein deposition (Carvalho, 2017;Castro et al, 2020).…”

Section: Ann Model Of Egg Productionmentioning

confidence: 57%

“…A total of 2300 records (23 treatments × five replicates × 20 weeks) were added during the fieldwork. The EAA ranges in the experimental design were established to include the levels for second-cycle hens in commercial genetic lines available in the literature (Schmidt et al, 2009a(Schmidt et al, , 2009b(Schmidt et al, , 2010Schneider, 2011;Polese et al, 2012;Agustini et al, 2014;Hy-Line, 2014) and levels recommended by Rostagno et al (2011) and Rostagno et al (2017) for laying-hen brown eggs with medium-superior performance in the first production cycle.…”

Section: Experimental Designmentioning

confidence: 99%

Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Morales-Suárez¹,

Ospina-Rojas²,

Méndez-Arteaga³

et al. 2021

Revista Brasileira De Zootecnia

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Non-ruminantsFull-length research article Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens ABSTRACT -An experiment with 23 diets was performed to evaluate the effect of digestible lysine (Lys), digestible methionine + cysteine (Met+Cys), and digestible threonine (Thr) on egg production of H&N Brown second-cycle laying hens (SCLH) for 20 weeks (92-111 weeks of age) in cages under environmental conditions. Body weight (BW), feed intake (FI), feed conversion ratio (FCR), egg weight (EW), number of hen-housed eggs, and livability were also evaluated during the experiment. Diets were formulated from a central composite design that combined five levels of Lys, Met+Cys, and Thr ranging from 727 to 1159, 662 to 1055, and 552 to 882 mg/kg, respectively. Egg production (EP) data were evaluated through three different modeling strategies: egg production models, multivariate polynomial models, and artificial neural networks (ANN). A cascade-forward neural network with logsigmoid transfer function was selected as the best model according to goodness-offit statistics in both identification and validation data. One of the best scenarios for EP of H&N Brown SCLH under specific outdoor conditions was established at Lys, Met+Cys, and Thr levels of 1138, 1031, and 717 mg/hen• day, respectively. The ANN model may be an appropriate tool to study and predict EP of H&N Brown SCLH based on the combination of three different levels of essential digestible amino acids. The strategies included in this work may contribute to improving poultry performance based on modeling techniques to study other production parameters in terms of different nutritional requirements and productive conditions.

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“…Silva et al (14) também observaram efeito residual na produção de ovos quando se elevou o nível de lisina na fase de uma a seis semanas de idade. O efeito da suplementação de metionina sobre a produção de ovos de poedeiras comerciais em diversas fases de produção já foi relatado por diversos autores (15)(16)(17)(18) . Portanto, a suplementação de metionina é tão importante na fase de produção quanto na fase de cria, mantendo um efeito residual sobre a produção de ovos posteriormente na fase de produção.…”

Section: Resultsunclassified

Exigência De Metionina + Cistina Para Frangas De Reposição Na Fase Inicial (1 a 6 Semanas De Idade)

et al. 2017

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ResumoObjetivou-se determinar a exigência de metionina + cistina total para frangas na fase inicial e verificar seu efeito sobre a fase de postura. Na primeira fase experimental, 720 aves (50% Lohmann LSL e 50% Lohmann Brown) com uma semana de idade foram distribuídas em delineamento experimental inteiramente casualizado, em esquema fatorial 5 x 2 (níveis de met + cis e linhagens), com quatro repetições e 18 aves por repetição. Os níveis de met + cis total estudados foram 0,536; 0,616; 0,696; 0,776; e 0,856 %. Ao atingirem 22 semanas de idade, iniciou-se a segunda fase experimental, sendo utilizadas 240 aves (50% Lohmann LSL e 50% Lohmann Brown) provenientes da primeira fase experimental. A ração fornecida às aves nesta fase foi igual para todos os tratamentos. Na fase de produção avaliaram-se os efeitos residuais das dietas fornecidas no período inicial sobre os parâmetros produtivos. As exigências de metionina + cistina recomendadas para aves leves e semipesadas, no período de 1 a 6 semanas de idade, são de 0,778% de met + cis total (correspondendo a 0,700% de met + cis digestível) e 0,739% de met + cis total (correspondendo a 0,665% de met + cis digestível), respectivamente.Palavras-chave: aminoácidos; maturidade sexual; ovos; poedeiras; requerimentos. AbstractAn experiment was carried out to evaluate the requirement of methionine +cystine for growing pullets at starter phase (1 to 6 weeks old) and its effect on the laying phase. In the first experiment, 720 birds (50% Lohmann LSL and 50% Lohmann Brown) at one week of age were distributed on a completely randomized design, 5 x 2 factorial arrangement (levels of met + cys and strain), with four replications

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Quantidade de metionina+cistina digestível para poedeiras semipesadas de 75 a 91 semanas de idade

Abstract: 0.132, 0.173, 0.215, in order to provide 0.588, 0.628, 0.669, 0.709 and 0.750% methionine + cystine in the diet. The inclusion of methionine + cystine followed, respectively, the proportions of 67, 72, 77, 81 and 86% with

Cited by 7 publications

References 9 publications

Methionine plus Cystine Levels for Light Laying Hens on Production Phase

Methionine plus Cystine Levels for Light Laying Hens on Production Phase

Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Exigência De Metionina + Cistina Para Frangas De Reposição Na Fase Inicial (1 a 6 Semanas De Idade)

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