Methionine plus Cystine Levels for Light Laying Hens on Growth Phase
<p>The aim of this study was to evaluate the methionine plus cystine levels in the diets of laying hens during the rearing period (13-18 weeks old). The diets included a control diet formulated according to NRC and five other diets with different levels of this digestible methionine plus cysti...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Instituto Federal de Educação, Ciência e Tecnologia da Paraíba
2021-02-01
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| Series: | Revista Principia |
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| Online Access: | https://periodicos.ifpb.edu.br/index.php/principia/article/view/4277 |
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| author | Marcelo Helder Medeiros Santana Fernando Guilherme Perazzo Costa Ricardo Romão Guerra Jalceyr Pessoa Figueiredo Júnior Matheus Ramalho de Lima Sarah Gomes Pinheiro |
| author_facet | Marcelo Helder Medeiros Santana Fernando Guilherme Perazzo Costa Ricardo Romão Guerra Jalceyr Pessoa Figueiredo Júnior Matheus Ramalho de Lima Sarah Gomes Pinheiro |
| author_sort | Marcelo Helder Medeiros Santana |
| collection | DOAJ |
| description | <p>The aim of this study was to evaluate the methionine plus cystine levels in the diets of laying hens during the rearing period (13-18 weeks old). The diets included a control diet formulated according to NRC and five other diets with different levels of this digestible methionine plus cystine (0.317, 0.356, 0.396, 0.436 and 0.475%) that have been based on the recommendations of the Brazilian poultry and swine tables. Performance, serological and histological variables were evaluated. There was a linear effect on final body weight, weight gain, methionine plus cystine intake and feed conversion, and quadratic effect on the serum albumin levels, serum protein levels and relative spleen weight. The estimated levels of digestible methionine plus cystine were 0.361%, 0.346% and 0.398%, for albumin activity, serum protein and relative weight of spleen, respectively. The different formulation bases significantly influenced the histology of the liver, small intestine and magnum. It is recommended the use of levels above 0.475% of digestible methionine plus cystine for light laying hens with 13-18 weeks old, which corresponded to a ratio of digestible methionine plus cystine: digestible lysine of more than 98%.</p> |
| first_indexed | 2024-04-12T14:13:42Z |
| format | Article |
| id | doaj.art-ef8ae5e9492c42468ed6502c10678f60 |
| institution | Directory Open Access Journal |
| issn | 1517-0306 2447-9187 |
| language | English |
| last_indexed | 2024-04-12T14:13:42Z |
| publishDate | 2021-02-01 |
| publisher | Instituto Federal de Educação, Ciência e Tecnologia da Paraíba |
| record_format | Article |
| series | Revista Principia |
| spelling | doaj.art-ef8ae5e9492c42468ed6502c10678f602022-12-22T03:29:49ZengInstituto Federal de Educação, Ciência e Tecnologia da ParaíbaRevista Principia1517-03062447-91872021-02-0115318018910.18265/1517-0306a2020v1n53p180-1891290Methionine plus Cystine Levels for Light Laying Hens on Growth PhaseMarcelo Helder Medeiros Santana0Fernando Guilherme Perazzo Costa1Ricardo Romão Guerra2Jalceyr Pessoa Figueiredo Júnior3Matheus Ramalho de Lima4Sarah Gomes Pinheiro5Instituto Federal de Educação, Ciência e Tecnologia da Paraíba (IFPB), Campus SousaUniversidade Federal da Paraíba (UFPB)Secretaria de Estado de Agropecuária (SEAP-AC)Secretaria de Estado de Agropecuária (SEAP-AC)Universidade Federal do Sul da Bahia (UFSB)Vita Vet – Nutrição e Saúde Animal<p>The aim of this study was to evaluate the methionine plus cystine levels in the diets of laying hens during the rearing period (13-18 weeks old). The diets included a control diet formulated according to NRC and five other diets with different levels of this digestible methionine plus cystine (0.317, 0.356, 0.396, 0.436 and 0.475%) that have been based on the recommendations of the Brazilian poultry and swine tables. Performance, serological and histological variables were evaluated. There was a linear effect on final body weight, weight gain, methionine plus cystine intake and feed conversion, and quadratic effect on the serum albumin levels, serum protein levels and relative spleen weight. The estimated levels of digestible methionine plus cystine were 0.361%, 0.346% and 0.398%, for albumin activity, serum protein and relative weight of spleen, respectively. The different formulation bases significantly influenced the histology of the liver, small intestine and magnum. It is recommended the use of levels above 0.475% of digestible methionine plus cystine for light laying hens with 13-18 weeks old, which corresponded to a ratio of digestible methionine plus cystine: digestible lysine of more than 98%.</p>https://periodicos.ifpb.edu.br/index.php/principia/article/view/4277nutritional requirementsproductive performancesulfur amino acids. |
| spellingShingle | Marcelo Helder Medeiros Santana Fernando Guilherme Perazzo Costa Ricardo Romão Guerra Jalceyr Pessoa Figueiredo Júnior Matheus Ramalho de Lima Sarah Gomes Pinheiro Methionine plus Cystine Levels for Light Laying Hens on Growth Phase Revista Principia nutritional requirements productive performance sulfur amino acids. |
| title | Methionine plus Cystine Levels for Light Laying Hens on Growth Phase |
| title_full | Methionine plus Cystine Levels for Light Laying Hens on Growth Phase |
| title_fullStr | Methionine plus Cystine Levels for Light Laying Hens on Growth Phase |
| title_full_unstemmed | Methionine plus Cystine Levels for Light Laying Hens on Growth Phase |
| title_short | Methionine plus Cystine Levels for Light Laying Hens on Growth Phase |
| title_sort | methionine plus cystine levels for light laying hens on growth phase |
| topic | nutritional requirements productive performance sulfur amino acids. |
| url | https://periodicos.ifpb.edu.br/index.php/principia/article/view/4277 |
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