Desempenho e qualidade dos ovos de poedeiras comerciais alimentadas com rações contendo diferentes níveis de metionina e lisina

Silva, Mayra Fernanda Rizzo; Faria, Douglas Emygdio de; Rizzoli, Paula Wick; Santos, A. L. F. dos; Sakamoto, Márcia Izumi; Souza, Henrique Rosa Baltazar de

doi:10.1590/s1516-35982010001000021

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Increasing dietary digestible lysine levels have been previously studied (Silva et al, 2010;Jardim Filho et al, 2010) and the results indicated that higher lysine levels resulted in heavier eggs, higher albumen percentage (Jardim Filho et al, 2008;Schmidt et al, 2008;Silva et al, 2010;Jardim Filho et al, 2010), and higher yolk percentage (Schmidt et al, 2008;Rocha et al, 2009;Jardim Filho et al, 2010;Silva et al, 2010). Other authors found increased egg weight with 770 Methionine + cystine (g/kg) 6.9…”

Section: Resultsmentioning

confidence: 99%

“…Other experiments showed that increasing the levels of digestible lysine of layer diets did not affect Haugh units (Jardim Filho et al, 2008;Schmidt et al, 2008;Matos et al, 2009;Rocha et al, 2009;Jardim Filho et al, 2010;Silva et al, 2010;), yolk index (Jardim Filho et al, 2008;Schmidt et al, 2008;Rocha et al, 2009;Jardim Filho et al, 2010), or total egg solids (Jardim Filho et al, 2008;Matos et al, 2009;Jardim Filho et al, 2010).…”

Section: Egg Quality Of Hens Fed Different Digestible Lysine and Argimentioning

confidence: 96%

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Egg quality of hens fed different digestible lysine and arginine levels

Carvalho¹,

Stringhini²,

Matos³

et al. 2015

Rev. Bras. Cienc. Avic.

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This experiment aimed at evaluating the influence of the supplementation of digestible lysine and digestible arginine at different ratios in the diet fed to layers between 24 to 44 weeks of age on egg quality. In total,320 Lohmann LSL laying hens were allotted according to a completely randomized design in a 2 x 4factorial arrangement, consisting of two digestible lysine levels (700 or 900 mg/kg of diet) and four digestible arginine levels (700, 800, 900,or 1000 mg/kg of diet). Diets contained, therefore, digestible Lys:Arg ratios of 100, 114, 128, and 142 when the diet contained 700 mg digestible lysine per kg of diet, and 78, 89, 100, and 111 when 900 mg digestible lysine per kg was supplemented. The data obtained with digestible arginine levels were fitted to polynomial regression equations, and with digestible lysine, the F test (5% probability) was used to compare the means. The following variables were evaluated: egg weight; internal egg quality (yolk percentage and index, albumen percentage, Haugh units), eggshell quality (specific gravity andeggshell percentage); and whole egg, albumen, and yolk solids content. Digestible lysine and arginine interaction did not affect egg quality. Increasing levels of digestible lysine and arginine reduced eggshell quality and albumen solids, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Egg Quality Of Hens Fed Different Digestible Lysine and Argimentioning

confidence: 96%

Egg quality of hens fed different digestible lysine and arginine levels

Carvalho¹,

Stringhini²,

Matos³

et al. 2015

Rev. Bras. Cienc. Avic.

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“…one of the main roles of choline is to donate methyl radicals, as well as methionine (Silva et al, 2010). These features may explain the inferior live performance when both synthetic methionine and choline were replaced in the diet (VMAC)compared with broilers consuming the diet where choline chloride 60% (AC) was replaced.…”

Section: Dietary Supplementation Of Alternative Methionine and Cholinmentioning

confidence: 99%

Dietary Supplementation of Alternative Methionine and Choline Sources in the Organic Broiler Production in Brazil

Filho¹,

de²,

Possamai³

2015

Rev. Bras. Cienc. Avic.

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The objective of this study was to evaluate the use of natural and alternative sources of methionine and choline which can be allowed to use in organic livestock systems to feed broilers produced in Brazil. Seven hundred and twenty one-d-old male Cobb broilers were randomly allocated to four treatments with six replicates of 24 birds each. The treatments consisted in substituting the commonly used DL-methionine 99% by a vegetable source of methionine and cholinechloride 60% by alternative source of choline in the form of phosphatidylcholine. The following treatments were evaluated: I) feed with DL-methionine 99% and choline chloride 60%, II) feed with an vegetable methionine source and choline chloride 60%, III) feed with DL-methionine 99% and choline as phosphatidylcholine, and IV) feed with vegetable methionine source and choline as phosphatidylcholine. Daily weight gain, body weight, feed intake, feed conversion ratio, and mortality were evaluated for the periods of 1 to 21 and 1 to 42 days of age. During both periods, broilers fed the vegetable methionine source presented lower daily gain and lower body weight. When only choline chloride was substituted by the alternative choline source, broiler performance was not different compared with that of the control group. The group fed the diet with substitution of both DL-methionine 99% and choline chloride 60% by natural sources presented lower daily weight gain, final body weight, and feed intake. Further research on alternative nutrient sources are required for the development of the organic production chain.

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“…For many years, the formulation of chicken feedwas based on the concept of crude protein, resulting in amino acid content above that required by animals (SILVA et al, 2010). As the production of synthetic amino acids has increased in the world, diets have started to be formulated with lower protein levels and increased amino acid levels according to broilers requirements.…”

Section: Introductionmentioning

confidence: 99%

Digestible tryptophan levels for male broilers in pre-starter and starter diets

Borges

Nunes

Strighini

et al. 2016

SCA

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The objective was to determine the digestible tryptophan requirements for male broilers in pre-starter and starter phases. Two experiments using 400 Cobb broilers were performed 200 males in the first experiment for the pre-starter phase (one to seven days old), and 200 males in the second experiment for the starter phase (eight to 21 days old). Chicks were housed in batter boxes made of galvanized steel as an experimental shed. The experiments were performed in a completely randomized design, with four treatments and five replicates, with ten birds each. In both experiments, the tryptophan requirement was determined using diets with different levels of digestible tryptophan. A tryptophan-deficient diet was formulated, as a basal diet, which was supplemented with increased levels of L-tryptophan in order to achieve the desirable digestible tryptophan levels. Treatments consisted of 0.209% (basal diet); 0.223%; 0.235% and 0.248% digestible tryptophan for the pre-starter phase (experiment 1) and 0.187% (basal diet); 0.200%, 0.211% and 0.223% digestible tryptophan for the starter phase (experiment 2). We evaluated feed intake, weight gain and feed conversion, as well as the metabolizability of feed nutrients. The performance and metabolic data were subjected to analysis of variance, and estimates of digestible tryptophan levels were made through polynomial regression models at 5% probability. There was no significant difference between the digestible tryptophan levels in the diet over performance and digestibility in both treatments. It is possible to conclude that the basal diet with 0.209% digestible tryptophan for the pre-starter phase and 0.187% for the starter phase, at a tryptophan: lysine ratio of 16%, as sufficient to meet the broilers requirements. Key words: Animal nutrition. Chickens. Digestible amino acid. Digestibility. Performance. ResumoObjetivou-se determinar as exigências de triptofano digestível para frangos de corte machos nas fases pré-inicial e inicial. Foram realizados dois experimentos utilizando 400 frangos de corte da linhagem Cobb, sendo o experimento 1 com 200 machos para a fase pré-inicial (um a sete dias de idade), e o 1 M.e em Ciência Animal, Escola de Medicina Veterinária e Zootecnia, EVZ, Universidade Federal de Goiás, UFG, Goiânia, GO,Brasil. E-mail: brunozootecnia22@hotmail.com 2 Profs., Pós-Graduação em Zootecnia, EVZ/UFG, Goiânia, GO, Brasil. E-mail: romaocnunes@hotmail.com; jhstring@uol.com. br; alegimenez09@hotmail.com; heloisamello@gmail.com 3 Discentes do Curso de Doutorado em Zootecnia, EVZ/UFG, Goiânia, GO, Brasil. E-mail: julyanamachado_zoo@hotmail.com; raianazoo@hotmail.com; mary_zoo@hotmail.com * Author for correspondence experimento 2 com 200 machos para a fase inicial (oito a 21 dias de idade), alojados em baterias, contendo gaiolas de arame galvanizado, em um galpão experimental. Os experimentos foram realizados em delineamento inteiramente casualizado, divididos em quatro tratamentos, com cinco repetições e dez aves por repetição, sendo que cada repetição com...

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Desempenho e qualidade dos ovos de poedeiras comerciais alimentadas com rações contendo diferentes níveis de metionina e lisina

Cited by 4 publications

References 10 publications

Egg quality of hens fed different digestible lysine and arginine levels

Egg quality of hens fed different digestible lysine and arginine levels

Dietary Supplementation of Alternative Methionine and Choline Sources in the Organic Broiler Production in Brazil

Digestible tryptophan levels for male broilers in pre-starter and starter diets

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