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| Pastore,Silvana Marques; Gomes,Paulo Cezar; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Calderano,Arele Arlindo; Vellasco,Cássia Rampini; Viana,Gabriel da Silva; Almeida,Rodrigo Lopes de. |
| The experiment was conducted to determine the nutritional requirement of calcium and the best calcium:available phosphorus ratio for commercial layers at the post-laying peak. A total of 324 Hy-Line W-36 laying hens were utilized in the period from 42 to 58 weeks of age, distributed in a completely randomized design in a 3 × 3 factorial arrangement, composed of three levels of calcium (39, 42 and 45 g/kg) and three calcium:phosphorus ratios (12.12:1; 10.53:1; and 9.30:1), totaling nine treatments with six replications and six birds per experimental unit. There was no significant effect from the calcium levels × calcium:phosphorus ratio interaction for any of the variables studied. The calcium levels and the calcium:phosphorus ratios did not affect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Mineral; Performance; Requirement. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200007 |
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| Mello,Heloisa Helena de Carvalho; Gomes,Paulo Cezar; Rocha,Tatiana Cristina da; Donzele,Juarez Lopes; Almeida,Rodrigo Lopes de; Troni,Allan Reis; Carvalho,Bruno Reis de; Viana,Gabriel da Silva. |
| Two hundred and fifty-two Hy-Line W36 laying hens were allotted in a completely randomized design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal ratio of isoleucine (Ile) in relation to lysine (Lys) to laying hens aged 42-58 weeks. Experimental diets contained digestible Ile at different levels, resulting in different Ile:Lys ratios (0.73:1; 0.78:1; 0.83:1; 0.88:1; 0.93:1 and 0.98:1). A basal diet was formulated to provide Isoleucine in levels below recommendations. This diet was supplemented with L-isoleucine to make up the 6 diets. Each diet was made isonitrogenous by varying the dietary contents of glutamic acid and isocaloric by adjusting the contents of cornstarch. All essential amino acids were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible amino acids; Egg quality; Ideal protein; White laying hens. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500032 |
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| Pastore,Silvana Marques; Albino,Luiz Fernando Teixeira; Gomes,Paulo Cezar; Oliveira,Will Pereira de; Viana,Gabriel da Silva; Silva,Eliane Aparecida da; Alves,Warley Junior. |
| ABSTRACT: This trial was performed to determine the dietary digestible threonine-to-lysine (dig. Thr-to-Lys) ideal ratio for laying hens fed with low-protein diets from 24 to 40 weeks of age. At 24 weeks of age, two hundred forty Hy Line W-36 laying hens were randomly assigned to five treatments, represented by five dig Thr-to-Lys ratios (60; 67; 74; 81 and 88%), with eight replicates each one with six hens per experimental unit. Digestible Thr-to-Lys did not affect laying hen performance and egg quality, except for digestible Threonine intake, which showed linear increase as dig. Thr-to-Lys ratios increased. Linear broken-line model was chosen to analyze data according to lack of fit. According to linear broken-linen estimates, digestible Threonine ideal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Performance; Egg quality; Ratios among amino acids. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202229 |
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| Pastore,Silvana Marques; Gomes,Paulo Cezar; Barreto,Sérgio Luiz Toledo; Viana,Gabriel da Silva; Silva,Eliane Aparecida da; Almeida,Rodrigo Lopes de; Barbosa,Leonardo Valentino Soares; Oliveira,Will Pereira de. |
| O objetivo com este trabalho foi determinar a exigência nutricional de lisina digestível para galinhas poedeiras leves em idade avançada. Foram utilizadas 288 galinhas poedeiras Hy Line W-36 com 60 semanas de idade, distribuídas em delineamento inteiramente casualizado, com seis níveis de lisina digestível (6,0; 6,6; 7,2; 7,8; 8,4 e 9,0g kg-1), oito repetições e seis aves por unidade experimental. Os níveis de lisina digestível na ração influenciaram de forma linear o consumo de lisina e a eficiência de utilização da lisina. Para a produção e massa de ovos, os platôs ocorreram a partir dos níveis de 6,57g kg-1 e de 7,10g kg-1 de lisina digestível, respectivamente. Houve efeito quadrático dos níveis de lisina sobre o peso de gema, com o nível estimado em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aminoácido; Aves; Desempenho; Proteína ideal; Qualidade dos ovos.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801496 |
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| Rocha,Tatiana Cristina da; Donzele,Juarez Lopes; Gomes,Paulo Cezar; Mello,Heloisa Helena de Carvalho; Troni,Allan Reis; Viana,Gabriel da Silva. |
| Two hundred fifty-two Hy-Line W36 laying hens were allotted in a randomized block design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal digestible isoleucine: digestible lysine (Ile:Lys) ratio for laying hens aged 24-40 weeks. Experimental diets contained 5.92, 6.33, 6.73, 7.14, 7.54 and 7.95 g/kg of digestible isoleucine, resulting in different Ile:Lys ratios (0.73:1, 0.78:1, 0.83:1, 0.88:1, 0.93:1 and 0.98:1). Experimental diets were isonitrogenous, with different dietary contents of glutamic acid, and made isocaloric by adjusting the levels of cornstarch. All essential amino acids were provided proportionally to digestible lysine. Feed intake, egg production, egg weight, egg mass, feed conversion ratio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible amino acid; Egg mass; Egg production; Protein. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100003 |
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| Muniz,Jorge Cunha Lima; Barreto,Sérgio Luiz de Toledo; Mencalha,Raquel; Viana,Gabriel da Silva; Reis,Renata de Souza; Ribeiro,Cleverson Luís Nascimento; Hannas,Melissa Izabel; Albino,Luiz Fernando Teixeira. |
| ABSTRACT: This trial was carried out to evaluate the effects of dietetic metabolizable energy levels on performance and carcass traits of meat quails from 15 to 35 days old. Five hundred sixty, 15-d old, meat quails were randomly assigned to five treatments (2.850; 2.950; 3.050; 3.150 e 3.250kcal of ME kg-1 of diet), with eight replicates and fourteen birds per experimental unit. Feed intake, protein and lysine intake and feed conversion decreased linearly as the metabolizable energy content of diets increased (P<0.01), whereas metabolizable energy intake, body weight, weight gain and viability were not affected (P>0.05) by the treatments. Diets did not influence (P>0.05) carcass traits as dry matter, moisture and protein content in carcass.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coturnix coturnix sp; Energy: protein ratio; Performance. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001852 |
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