Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency

Detalhes bibliográficos
Autor(a) principal: Paz, Manuel Enrique Ruiz
Data de Publicação: 2014
Outros Autores: Thiago, Luiz Roberto Lopes de São
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/13965
Resumo: Two experiments were conducted to compare different feeding frequencies with regard to dry matter (DM) intake, rumen contents, apparent ruminal retention time of the neutral detergent fiber (rNDF) and 48-h in situ DM digestibility (ISDMD). In experiment 1 three rumen-fistulated steers were fed a ration of brachiaria (Brachiaria decumbens) hay, freshly cut pigeon pea (Cajanus cajan) forage and ground sorghum; six treatments were applied in an unbalanced design: a) Hourly feeding, b) Feeding every 3 h, c) Feeding every 6 h, d) Feeding every 12 h, e) Feeding every 3 h from 6:00 AM to 9:00 PM at which time the rest of the daily ration was given, and f) Feeding every 3 h from 6:00 AM to 6:00 PM when the rest of the daily ration was offered. In experiment 2, six animals were used to compare hourly feeding vs. feeding every 6 h in a switchback design. The ration consisted of sugarcane tops, pigeon pea forage and ground corn ears. Means for net DM intake (kg/100 kg LW/ day), rumen contents (kg DM/100 kg LW), rNDF (h), brachiaria ISDMD (%) and pigeon pea forage ISDMD (%) for experiment 1 were: 1.93, 1.76, 23.8, 66.0 and 63.1, respectively, with no significant differences. In experiment 2, the means for DM intake, rumen contents, rNDF and pigeon pea ISDMD were: 1.76, 1.79, 37.6 and 53.4, respectively, again with no significant treatment differences. It was concluded that feeding frequency is not a factor of importance in the methodology for rumen digestion studies. 
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spelling Methodological aspects in ruminal digestion studies. I. Effect of feeding frequencyAspectos metodológicos em estudos de digestão ruminal. I. Efeito da frequência de alimentaçãosteers; feed intake; rumen contents; in situ digestibility; ruminal retention timenovilhos; consumo de alimento; conteúdo ruminal; digestibilidade in situ; tempo de retenção ruminalTwo experiments were conducted to compare different feeding frequencies with regard to dry matter (DM) intake, rumen contents, apparent ruminal retention time of the neutral detergent fiber (rNDF) and 48-h in situ DM digestibility (ISDMD). In experiment 1 three rumen-fistulated steers were fed a ration of brachiaria (Brachiaria decumbens) hay, freshly cut pigeon pea (Cajanus cajan) forage and ground sorghum; six treatments were applied in an unbalanced design: a) Hourly feeding, b) Feeding every 3 h, c) Feeding every 6 h, d) Feeding every 12 h, e) Feeding every 3 h from 6:00 AM to 9:00 PM at which time the rest of the daily ration was given, and f) Feeding every 3 h from 6:00 AM to 6:00 PM when the rest of the daily ration was offered. In experiment 2, six animals were used to compare hourly feeding vs. feeding every 6 h in a switchback design. The ration consisted of sugarcane tops, pigeon pea forage and ground corn ears. Means for net DM intake (kg/100 kg LW/ day), rumen contents (kg DM/100 kg LW), rNDF (h), brachiaria ISDMD (%) and pigeon pea forage ISDMD (%) for experiment 1 were: 1.93, 1.76, 23.8, 66.0 and 63.1, respectively, with no significant differences. In experiment 2, the means for DM intake, rumen contents, rNDF and pigeon pea ISDMD were: 1.76, 1.79, 37.6 and 53.4, respectively, again with no significant treatment differences. It was concluded that feeding frequency is not a factor of importance in the methodology for rumen digestion studies. Realizaram-se dois experimentos para verificar o efeito de várias frequências de alimentação no consumo de matéria seca (MS), conteúdo ruminal, tempo aparente de retenção ruminal da fibra detergente neutro (rFDN) e na digestibilidade in situ em 48 h da MS (DISMS). Experimento 1: 3 novilhos fistulados no rumen receberam uma ração de feno de braquiária (Brachiaria decumbens), guandu fresco (Cajanus cajan) e panícula de sorgo moído; foram testados 6 tratamentos em um delineamento não balanceado: a) Alimentação a cada hora, b) a cada 3 h, c) a cada 6 h, d) a cada 12 h, e) a cada 3 h, das 6:00 horas até as 21:00 horas, quando receberam o restante da ração, f) a cada 3 h, das 6:00 horas até as 18:00, quando receberam o restante da ração. Experimento 2: utilizaram-se 6 novilhos e 2 tratamentos: Alimentação a cada hora vs. alimentação a cada 6 h, num delineamento de reversão dupla. A ração consistiu de ponta de cana, guandu e milho com palha e sabugo. As médias para consumo de MS (kg/100 kg PV/dia), conteúdo ruminal (kg MS/100 kg PV), rFDN (h), DISMS do feno de braquiária (%) e DISMS do guandu (%) foram: 1,93; 1,76; 23,8; 66,0 e 63,1, respectivamente. No experimento 2, as médias para consumo de MS, conteúdo ruminal, rFDN e DISMS do guandu, foram: 1,76; 1,79; 37,6 e 53,4; respectivamente. Não se apresentaram diferenças significativas devidas aos tratamentos. Concluiu-se que a frequência de alimentação não é de importância para o estudo da digestão ruminal. Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPaz, Manuel Enrique RuizThiago, Luiz Roberto Lopes de São2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13965Pesquisa Agropecuaria Brasileira; v.23, n.7, jul. 1988; 797-804Pesquisa Agropecuária Brasileira; v.23, n.7, jul. 1988; 797-8041678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/13965/7935info:eu-repo/semantics/openAccess2014-09-15T19:51:59Zoai:ojs.seer.sct.embrapa.br:article/13965Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-15T19:51:59Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
Aspectos metodológicos em estudos de digestão ruminal. I. Efeito da frequência de alimentação
title Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
spellingShingle Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
Paz, Manuel Enrique Ruiz
steers; feed intake; rumen contents; in situ digestibility; ruminal retention time
novilhos; consumo de alimento; conteúdo ruminal; digestibilidade in situ; tempo de retenção ruminal
title_short Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
title_full Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
title_fullStr Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
title_full_unstemmed Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
title_sort Methodological aspects in ruminal digestion studies. I. Effect of feeding frequency
author Paz, Manuel Enrique Ruiz
author_facet Paz, Manuel Enrique Ruiz
Thiago, Luiz Roberto Lopes de São
author_role author
author2 Thiago, Luiz Roberto Lopes de São
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Paz, Manuel Enrique Ruiz
Thiago, Luiz Roberto Lopes de São
dc.subject.por.fl_str_mv steers; feed intake; rumen contents; in situ digestibility; ruminal retention time
novilhos; consumo de alimento; conteúdo ruminal; digestibilidade in situ; tempo de retenção ruminal
topic steers; feed intake; rumen contents; in situ digestibility; ruminal retention time
novilhos; consumo de alimento; conteúdo ruminal; digestibilidade in situ; tempo de retenção ruminal
description Two experiments were conducted to compare different feeding frequencies with regard to dry matter (DM) intake, rumen contents, apparent ruminal retention time of the neutral detergent fiber (rNDF) and 48-h in situ DM digestibility (ISDMD). In experiment 1 three rumen-fistulated steers were fed a ration of brachiaria (Brachiaria decumbens) hay, freshly cut pigeon pea (Cajanus cajan) forage and ground sorghum; six treatments were applied in an unbalanced design: a) Hourly feeding, b) Feeding every 3 h, c) Feeding every 6 h, d) Feeding every 12 h, e) Feeding every 3 h from 6:00 AM to 9:00 PM at which time the rest of the daily ration was given, and f) Feeding every 3 h from 6:00 AM to 6:00 PM when the rest of the daily ration was offered. In experiment 2, six animals were used to compare hourly feeding vs. feeding every 6 h in a switchback design. The ration consisted of sugarcane tops, pigeon pea forage and ground corn ears. Means for net DM intake (kg/100 kg LW/ day), rumen contents (kg DM/100 kg LW), rNDF (h), brachiaria ISDMD (%) and pigeon pea forage ISDMD (%) for experiment 1 were: 1.93, 1.76, 23.8, 66.0 and 63.1, respectively, with no significant differences. In experiment 2, the means for DM intake, rumen contents, rNDF and pigeon pea ISDMD were: 1.76, 1.79, 37.6 and 53.4, respectively, again with no significant treatment differences. It was concluded that feeding frequency is not a factor of importance in the methodology for rumen digestion studies. 
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13965
url https://seer.sct.embrapa.br/index.php/pab/article/view/13965
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13965/7935
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.23, n.7, jul. 1988; 797-804
Pesquisa Agropecuária Brasileira; v.23, n.7, jul. 1988; 797-804
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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