The response of reproducing Japanese quail to dietary valine
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/00071668.2021.1905775 http://hdl.handle.net/11449/208595 |
Resumo: | 1. A feeding trial was conducted to measure the responses of Japanese quail to dietary valine. In total, 280 Japanese quail were randomly assigned to eight treatments giving seven replicates (cage–35 cm length, 35 cm width × 15 cm high). Experimental diets were formulated using a dilution technique to give a range dietary Val concentration (1.97 to 9.85 g/kg). 2. Feed intake was maximised at 6.66 g Val/kg and above, but declined linearly below this level. Body weight reached a maximum of 170 g on 6.66 g Val/kg. Egg output peaked at 9.5 ± 0.3 g/bird/d with an egg weight of 11 g for the 6.66 g Val/kg diet. Rate of laying for the group that received the feed with the lowest Val content was close to zero (1.40%), but egg weight on this treatment was 70% of the maximum egg weight. Valine required per gram of egg output was estimated as 10.6 mg/g, whereas the maintenance requirement was 159 mg/kg body weight. Val required for maximum egg output was estimated in 154 mg/d. 3. The marginal cost of Val in Brazil currently is negative below a level of 8.0 g/kg feed, which is above that required for maximum egg output. Consequently, Val cannot be regarded as a limiting amino acid currently, as the optimum economic intake exceeds the requirements of all the individuals in the population. The price of a quail egg weighing 11 g in Brazil at the time of the experiment was R$ 0.021. Even if the marginal revenue for these eggs was doubled to 0.4 c/g, there would be no reason to increase the intake of Val. |
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Repositório Institucional da UNESP |
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2946 |
spelling |
The response of reproducing Japanese quail to dietary valineAmino acidsdilution techniqueegg productionmarginal costmarginal revenue1. A feeding trial was conducted to measure the responses of Japanese quail to dietary valine. In total, 280 Japanese quail were randomly assigned to eight treatments giving seven replicates (cage–35 cm length, 35 cm width × 15 cm high). Experimental diets were formulated using a dilution technique to give a range dietary Val concentration (1.97 to 9.85 g/kg). 2. Feed intake was maximised at 6.66 g Val/kg and above, but declined linearly below this level. Body weight reached a maximum of 170 g on 6.66 g Val/kg. Egg output peaked at 9.5 ± 0.3 g/bird/d with an egg weight of 11 g for the 6.66 g Val/kg diet. Rate of laying for the group that received the feed with the lowest Val content was close to zero (1.40%), but egg weight on this treatment was 70% of the maximum egg weight. Valine required per gram of egg output was estimated as 10.6 mg/g, whereas the maintenance requirement was 159 mg/kg body weight. Val required for maximum egg output was estimated in 154 mg/d. 3. The marginal cost of Val in Brazil currently is negative below a level of 8.0 g/kg feed, which is above that required for maximum egg output. Consequently, Val cannot be regarded as a limiting amino acid currently, as the optimum economic intake exceeds the requirements of all the individuals in the population. The price of a quail egg weighing 11 g in Brazil at the time of the experiment was R$ 0.021. Even if the marginal revenue for these eggs was doubled to 0.4 c/g, there would be no reason to increase the intake of Val.Faculdade de Ciências Agrárias e Veterinárias (FCAV) Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP)Production Systems Natural Resources Institute FinlandSchool of Agricultural Earth and Environmental Sciences University of KwaZulu-NatalFaculdade de Ciências Agrárias e Veterinárias (FCAV) Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP)Universidade Estadual Paulista (Unesp)Natural Resources Institute FinlandUniversity of KwaZulu-NatalMartinez, K. N.M. [UNESP]Viana, G. da S.Silva, E. P. da [UNESP]Reis, M. P. [UNESP]Gous, R. M.Sakomura, N. K. [UNESP]2021-06-25T11:14:40Z2021-06-25T11:14:40Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1080/00071668.2021.1905775British Poultry Science.1466-17990007-1668http://hdl.handle.net/11449/20859510.1080/00071668.2021.19057752-s2.0-85104370419Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBritish Poultry Scienceinfo:eu-repo/semantics/openAccess2021-10-23T19:02:17Zoai:repositorio.unesp.br:11449/208595Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:02:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The response of reproducing Japanese quail to dietary valine |
title |
The response of reproducing Japanese quail to dietary valine |
spellingShingle |
The response of reproducing Japanese quail to dietary valine Martinez, K. N.M. [UNESP] Amino acids dilution technique egg production marginal cost marginal revenue |
title_short |
The response of reproducing Japanese quail to dietary valine |
title_full |
The response of reproducing Japanese quail to dietary valine |
title_fullStr |
The response of reproducing Japanese quail to dietary valine |
title_full_unstemmed |
The response of reproducing Japanese quail to dietary valine |
title_sort |
The response of reproducing Japanese quail to dietary valine |
author |
Martinez, K. N.M. [UNESP] |
author_facet |
Martinez, K. N.M. [UNESP] Viana, G. da S. Silva, E. P. da [UNESP] Reis, M. P. [UNESP] Gous, R. M. Sakomura, N. K. [UNESP] |
author_role |
author |
author2 |
Viana, G. da S. Silva, E. P. da [UNESP] Reis, M. P. [UNESP] Gous, R. M. Sakomura, N. K. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Natural Resources Institute Finland University of KwaZulu-Natal |
dc.contributor.author.fl_str_mv |
Martinez, K. N.M. [UNESP] Viana, G. da S. Silva, E. P. da [UNESP] Reis, M. P. [UNESP] Gous, R. M. Sakomura, N. K. [UNESP] |
dc.subject.por.fl_str_mv |
Amino acids dilution technique egg production marginal cost marginal revenue |
topic |
Amino acids dilution technique egg production marginal cost marginal revenue |
description |
1. A feeding trial was conducted to measure the responses of Japanese quail to dietary valine. In total, 280 Japanese quail were randomly assigned to eight treatments giving seven replicates (cage–35 cm length, 35 cm width × 15 cm high). Experimental diets were formulated using a dilution technique to give a range dietary Val concentration (1.97 to 9.85 g/kg). 2. Feed intake was maximised at 6.66 g Val/kg and above, but declined linearly below this level. Body weight reached a maximum of 170 g on 6.66 g Val/kg. Egg output peaked at 9.5 ± 0.3 g/bird/d with an egg weight of 11 g for the 6.66 g Val/kg diet. Rate of laying for the group that received the feed with the lowest Val content was close to zero (1.40%), but egg weight on this treatment was 70% of the maximum egg weight. Valine required per gram of egg output was estimated as 10.6 mg/g, whereas the maintenance requirement was 159 mg/kg body weight. Val required for maximum egg output was estimated in 154 mg/d. 3. The marginal cost of Val in Brazil currently is negative below a level of 8.0 g/kg feed, which is above that required for maximum egg output. Consequently, Val cannot be regarded as a limiting amino acid currently, as the optimum economic intake exceeds the requirements of all the individuals in the population. The price of a quail egg weighing 11 g in Brazil at the time of the experiment was R$ 0.021. Even if the marginal revenue for these eggs was doubled to 0.4 c/g, there would be no reason to increase the intake of Val. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T11:14:40Z 2021-06-25T11:14:40Z 2021-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1080/00071668.2021.1905775 British Poultry Science. 1466-1799 0007-1668 http://hdl.handle.net/11449/208595 10.1080/00071668.2021.1905775 2-s2.0-85104370419 |
url |
http://dx.doi.org/10.1080/00071668.2021.1905775 http://hdl.handle.net/11449/208595 |
identifier_str_mv |
British Poultry Science. 1466-1799 0007-1668 10.1080/00071668.2021.1905775 2-s2.0-85104370419 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
British Poultry Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965594717519872 |