AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência animal brasileira (Online) |
Texto Completo: | https://revistas.ufg.br/vet/article/view/9698 |
Resumo: | The objective of this study was to compare the standard methodology with an alternative method to determine feed sorting in dairy cows during the transition period. Twenty-six Holstein multiparous cows were paired by expected calving date and fed diets containing either glycerol or high moisture corn from -28 through +56 days relative to calving (DRTC). Feed sorting was determined on -16, -9, +9, +15 and +51 DRTC in two different ways. Firstly, it was determined as the actual intake of each screen of the Penn State Particle Separator (PSPS) consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding, and expressed as a percentage of the predicted intake of that correspondent screen. Secondly, by measuring the particle size distribution of feed consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding. The total mixed ration (TMR) at feeding and at each time post feeding was separated by size using the 3-screen (19, 8, and 1.18 mm) Penn State Particle Separator (PSPS) to yield long (>19 mm), medium (<19, >8 mm), short (<8, >1.18 mm), and fine particles (<1.18 mm), respectively. Adding glycerol to the prepartum diet increased (P<0.05) the proportion of DM% retained as long particles (>19 mm) and reduced (P<0.05) the proportion of DM% retained as short (<8, >1.18 mm) and fine particles (<1.18 mm), but it did not alter (P>0.05) the proportion of DM% retained as medium particles (<19, >8 mm). Cows fed prepartum glycerol increased (P<0.05) the preference for long particles (>19 mm) according to the standard methodology (77.2 vs. 101.5%, control vs. glycerol) and also in the alternative methodology (9.2 vs. 17.8%, control vs. glycerol). Cows fed prepartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) in the standard methodology (102.6 vs. 94.2%, control vs. glycerol) as well as in the alternative methodology (42 vs. 37.3%, control vs. glycerol). There was no response (P>0.05) of diet on feed sorting of fine particles (<1.18 mm) according to standard methodology during the prepartum interval, but cows fed prepartum glycerol decreased (P<0.05) the preference for fine particles (<1.18 mm) in the alternative methodology (17.9 vs. 13.6%, control vs. glycerol). Cows fed postpartum glycerol increased (P<0.05) the preference for medium particles (<19, >8 mm) according to the standard methodology (108.6 vs. 116.5%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Cows fed postpartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) according to the standard methodology (100.6 vs. 96.6%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Feeding prepartum glycerol to transition dairy cows increases the preference for the long-stem forage particles of the diet. The alternative methodology proposed in this study is more reliable than the standard methodology to determine feed sorting. KEYWORDS: Biodiesel, byproduct, particle size, preference. |
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AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROLMETODOLOGIA ALTERNATIVA NA DETERMINAÇÃO DO CONSUMO SELETIVO EM VACAS LEITEIRAS NO PERÍODO DE TRANSIÇÃO ALIMENTADAS COM GLICEROLAnimal NutritionNutrição de RuminantesThe objective of this study was to compare the standard methodology with an alternative method to determine feed sorting in dairy cows during the transition period. Twenty-six Holstein multiparous cows were paired by expected calving date and fed diets containing either glycerol or high moisture corn from -28 through +56 days relative to calving (DRTC). Feed sorting was determined on -16, -9, +9, +15 and +51 DRTC in two different ways. Firstly, it was determined as the actual intake of each screen of the Penn State Particle Separator (PSPS) consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding, and expressed as a percentage of the predicted intake of that correspondent screen. Secondly, by measuring the particle size distribution of feed consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding. The total mixed ration (TMR) at feeding and at each time post feeding was separated by size using the 3-screen (19, 8, and 1.18 mm) Penn State Particle Separator (PSPS) to yield long (>19 mm), medium (<19, >8 mm), short (<8, >1.18 mm), and fine particles (<1.18 mm), respectively. Adding glycerol to the prepartum diet increased (P<0.05) the proportion of DM% retained as long particles (>19 mm) and reduced (P<0.05) the proportion of DM% retained as short (<8, >1.18 mm) and fine particles (<1.18 mm), but it did not alter (P>0.05) the proportion of DM% retained as medium particles (<19, >8 mm). Cows fed prepartum glycerol increased (P<0.05) the preference for long particles (>19 mm) according to the standard methodology (77.2 vs. 101.5%, control vs. glycerol) and also in the alternative methodology (9.2 vs. 17.8%, control vs. glycerol). Cows fed prepartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) in the standard methodology (102.6 vs. 94.2%, control vs. glycerol) as well as in the alternative methodology (42 vs. 37.3%, control vs. glycerol). There was no response (P>0.05) of diet on feed sorting of fine particles (<1.18 mm) according to standard methodology during the prepartum interval, but cows fed prepartum glycerol decreased (P<0.05) the preference for fine particles (<1.18 mm) in the alternative methodology (17.9 vs. 13.6%, control vs. glycerol). Cows fed postpartum glycerol increased (P<0.05) the preference for medium particles (<19, >8 mm) according to the standard methodology (108.6 vs. 116.5%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Cows fed postpartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) according to the standard methodology (100.6 vs. 96.6%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Feeding prepartum glycerol to transition dairy cows increases the preference for the long-stem forage particles of the diet. The alternative methodology proposed in this study is more reliable than the standard methodology to determine feed sorting. KEYWORDS: Biodiesel, byproduct, particle size, preference.Objetivou-se, nesta pesquisa, comparar a metodologia-padrão com um novo método alternativo na determinação do consumo seletivo em vacas leiteiras durante o período de transição. Vinte e seis vacas multíparas da raça Holandesa foram pareadas de acordo com a data prevista de parição e alimentadas com dietas contendo glicerol ou milho grão de alta umidade desde os -28 até +56 dias relativos à data de parição (DRDP). Determinou-se o consumo seletivo aos -16, -9, +9, +15 e +51 DRDP por duas maneiras. Na primeira, com o consumo real de cada peneira do Penn State Particle Separator (PSPS) entre 0-4, 4-8, 8-12 e 12-24 horas pós-alimentação, e expresso como a porcentagem do consumo predito da peneira correspondente. Na segunda maneira, por meio da mensuração da distribuição do tamanho de partículas do alimento consumido entre 0-4, 4-8, 8-12 e 12-24 horas pós-alimentação. Tanto no momento da alimentação quanto em cada tempo pós-alimentação, a ração foi separada por tamanho utilizando-se um conjunto com três peneiras (19, 8 e 1,18 mm) denominado Penn State Particle Separator (PSPS), gerando partículas longas (>19 mm), médias (<19, >8 mm), curtas (<8, >1,18 mm) e muito curtas (<1,18 mm), respectivamente. A adição de glicerol na dieta pré-parto aumentou (P<0,05) a proporção da %MS retida das partículas longas (> 19 mm) e reduziu (P<0,05) a proporção da %MS retida das partículas curtas (<8, >1,18 mm) e muito curtas (<1,18 mm), mas não alterou (P>0,05) a proporção da %MS retida das partículas médias (<19, >8 mm). Nas vacas alimentadas com glicerol no pré-parto, houve aumento (P<0,05) da preferência pelas partículas longas (>19 mm) na metodologia-padrão (77,2 vs 101,5%, controle vs. glicerol) e também na metodologia alternativa (9,2 vs 17,8%, controle vs. glicerol). As vacas alimentadas com glicerol no pré-parto discriminaram (P<0,05) as partículas curtas (<8, >1,18 mm) na metodologia-padrão (102,6 vs 94,2%, controle vs. glicerol) assim como na metodologia alternativa (42 vs. 37,3%, controle vs. glicerol). Não houve efeito (P>0,05) de tratamento sobre o consumo seletivo de partículas muito curtas (<1,18 mm) de acordo com a metodologia-padrão na fase pré-parto, mas nas vacas alimentadas com glicerol nessa fase houve diminuição (P<0,05) da preferência pelas partículas muito curtas (<1,18 mm) na metodologia alternativa (17,9 vs. 13,6%, controle vs. glicerol). Nas vacas alimentadas com glicerol na fase pós-parto, houve aumento (P<0,05) da preferência por partículas médias (<19, >8 mm) de acordo com a metodologia-padrão (108,6 vs. 116,5%, controle vs. glicerol), porém não houve efeito (P>0,05) de tratamento sobre o consumo seletivo de partículas médias (<19, >8 mm) na metodologia alternativa. As vacas alimentadas com glicerol no pós-parto discriminaram (P<0,05) as partículas curtas (<8, >1,18 mm) de acordo com a metodologia-padrão (100,6 vs. 96,6%, controle vs. glicerol), mas não houve resposta da dieta (P>0,05) sobre o consumo seletivo de partículas curtas (<8, >1,18 mm) na metodologia alternativa. A alimentação com glicerol para vacas leiteiras no período de transição aumenta a preferência por partículas longas (> 19 mm) da dieta durante o pré-parto. A metodologia alternativa proposta neste estudo é mais confiável do que a metodologia-padrão na determinação do consumo seletivo. PALAVRAS-CHAVES: Biodiesel, preferência, subproduto, tamanho de partícula.Universidade Federal de Goiás2010-12-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionResearchAvaliado por paresPesquisa Científicaapplication/pdftext/htmlhttps://revistas.ufg.br/vet/article/view/969810.5216/cab.v11i4.9698Brazilian Animal Science/ Ciência Animal Brasileira; Vol. 11 No. 4 (2010); 825 - 834Ciência Animal Brasileira / Brazilian Animal Science; v. 11 n. 4 (2010); 825 - 8341809-68911518-2797reponame:Ciência animal brasileira (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/vet/article/view/9698/8356https://revistas.ufg.br/vet/article/view/9698/8723Carvalho, Eduardo Rodrigues deLima, Milton Luiz MoreiraFrança, Aldi Fernandes de SouzaFernandes, Juliano José de ResendeWhite, Heather MuseDonkin, Shawn Scottinfo:eu-repo/semantics/openAccess2010-12-21T13:36:26Zoai:ojs.revistas.ufg.br:article/9698Revistahttps://revistas.ufg.br/vetPUBhttps://revistas.ufg.br/vet/oai||revistacab@gmail.com1809-68911518-2797opendoar:2024-05-21T19:55:43.618711Ciência animal brasileira (Online) - Universidade Federal de Goiás (UFG)true |
dc.title.none.fl_str_mv |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL METODOLOGIA ALTERNATIVA NA DETERMINAÇÃO DO CONSUMO SELETIVO EM VACAS LEITEIRAS NO PERÍODO DE TRANSIÇÃO ALIMENTADAS COM GLICEROL |
title |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
spellingShingle |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL Carvalho, Eduardo Rodrigues de Animal Nutrition Nutrição de Ruminantes |
title_short |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
title_full |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
title_fullStr |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
title_full_unstemmed |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
title_sort |
AN ALTERNATIVE METHODOLOGY OF DETERMINING FEED SORTING IN TRANSITION DAIRY COWS FED GLYCEROL |
author |
Carvalho, Eduardo Rodrigues de |
author_facet |
Carvalho, Eduardo Rodrigues de Lima, Milton Luiz Moreira França, Aldi Fernandes de Souza Fernandes, Juliano José de Resende White, Heather Muse Donkin, Shawn Scott |
author_role |
author |
author2 |
Lima, Milton Luiz Moreira França, Aldi Fernandes de Souza Fernandes, Juliano José de Resende White, Heather Muse Donkin, Shawn Scott |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Carvalho, Eduardo Rodrigues de Lima, Milton Luiz Moreira França, Aldi Fernandes de Souza Fernandes, Juliano José de Resende White, Heather Muse Donkin, Shawn Scott |
dc.subject.por.fl_str_mv |
Animal Nutrition Nutrição de Ruminantes |
topic |
Animal Nutrition Nutrição de Ruminantes |
description |
The objective of this study was to compare the standard methodology with an alternative method to determine feed sorting in dairy cows during the transition period. Twenty-six Holstein multiparous cows were paired by expected calving date and fed diets containing either glycerol or high moisture corn from -28 through +56 days relative to calving (DRTC). Feed sorting was determined on -16, -9, +9, +15 and +51 DRTC in two different ways. Firstly, it was determined as the actual intake of each screen of the Penn State Particle Separator (PSPS) consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding, and expressed as a percentage of the predicted intake of that correspondent screen. Secondly, by measuring the particle size distribution of feed consumed between 0-4, 4-8, 8-12 and 12-24 hours post feeding. The total mixed ration (TMR) at feeding and at each time post feeding was separated by size using the 3-screen (19, 8, and 1.18 mm) Penn State Particle Separator (PSPS) to yield long (>19 mm), medium (<19, >8 mm), short (<8, >1.18 mm), and fine particles (<1.18 mm), respectively. Adding glycerol to the prepartum diet increased (P<0.05) the proportion of DM% retained as long particles (>19 mm) and reduced (P<0.05) the proportion of DM% retained as short (<8, >1.18 mm) and fine particles (<1.18 mm), but it did not alter (P>0.05) the proportion of DM% retained as medium particles (<19, >8 mm). Cows fed prepartum glycerol increased (P<0.05) the preference for long particles (>19 mm) according to the standard methodology (77.2 vs. 101.5%, control vs. glycerol) and also in the alternative methodology (9.2 vs. 17.8%, control vs. glycerol). Cows fed prepartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) in the standard methodology (102.6 vs. 94.2%, control vs. glycerol) as well as in the alternative methodology (42 vs. 37.3%, control vs. glycerol). There was no response (P>0.05) of diet on feed sorting of fine particles (<1.18 mm) according to standard methodology during the prepartum interval, but cows fed prepartum glycerol decreased (P<0.05) the preference for fine particles (<1.18 mm) in the alternative methodology (17.9 vs. 13.6%, control vs. glycerol). Cows fed postpartum glycerol increased (P<0.05) the preference for medium particles (<19, >8 mm) according to the standard methodology (108.6 vs. 116.5%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Cows fed postpartum glycerol discriminated against (P<0.05) short particles (<8, >1.18 mm) according to the standard methodology (100.6 vs. 96.6%, control vs. glycerol), but did not (P>0.05) according to the alternative methodology. Feeding prepartum glycerol to transition dairy cows increases the preference for the long-stem forage particles of the diet. The alternative methodology proposed in this study is more reliable than the standard methodology to determine feed sorting. KEYWORDS: Biodiesel, byproduct, particle size, preference. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-12-21 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Research Avaliado por pares Pesquisa Científica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufg.br/vet/article/view/9698 10.5216/cab.v11i4.9698 |
url |
https://revistas.ufg.br/vet/article/view/9698 |
identifier_str_mv |
10.5216/cab.v11i4.9698 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufg.br/vet/article/view/9698/8356 https://revistas.ufg.br/vet/article/view/9698/8723 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
Brazilian Animal Science/ Ciência Animal Brasileira; Vol. 11 No. 4 (2010); 825 - 834 Ciência Animal Brasileira / Brazilian Animal Science; v. 11 n. 4 (2010); 825 - 834 1809-6891 1518-2797 reponame:Ciência animal brasileira (Online) instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Ciência animal brasileira (Online) |
collection |
Ciência animal brasileira (Online) |
repository.name.fl_str_mv |
Ciência animal brasileira (Online) - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
||revistacab@gmail.com |
_version_ |
1799874786996781056 |