NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES

The number of bags to be incubated per sample, and the number of fistulated cows needed to estimate in situ ruminal degradation of Kinggrass (Pennisetum purpureum) dry matter (DMD %) were determined. Three rumen-fistulated cows and 10 bags per incubation time (3, 6, 9, 12, 24, 48 and 72 h) were used...

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Detalhes bibliográficos
Autores: Epigmenio Castillo-Gallegos, Jesús Jarillo-Rodríguez, Ismael Cortes Salazar, Braulio Valles-de la Mora, Eliazar Ocaña-Zavaleta
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:México
Recursos:Universidad Nacional Autónoma de México
Repositorio:Redalyc-UNAM
OAI Identifier:oai:redalyc.org:93924626015
Acesso em linha:https://www.redalyc.org/articulo.oa?id=93924626015
Access Level:acceso abierto
Palavra-chave:Agrociencias
Kinggrass
dry matter
number of cows
number of bags
In situ degradation
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spelling NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVESEpigmenio Castillo-GallegosJesús Jarillo-RodríguezIsmael Cortes SalazarBraulio Valles-de la MoraEliazar Ocaña-ZavaletaAgrocienciasKinggrassdry matternumber of cowsnumber of bagsIn situ degradationThe number of bags to be incubated per sample, and the number of fistulated cows needed to estimate in situ ruminal degradation of Kinggrass (Pennisetum purpureum) dry matter (DMD %) were determined. Three rumen-fistulated cows and 10 bags per incubation time (3, 6, 9, 12, 24, 48 and 72 h) were used. Five grams of dried leaves were weighed per bag. Variance components for cows (Vc) and bags (Vb) per incubation time were estimated and used to calculate the standard error (SE) of mean DMD. The adequate number of bags to be used was the one that produced a value of 1 % (SE of the study). Precision increased as the number of cows increased, with mean SE of 1.66, 1.18 and 0.96 % for one, two and three cows, respectively. Precision remained more or less constant for incubation times of 3, 6, 9, 12 and 48 h, with respective values of 0.93, 0.81, 1.05, 0.92 and 1.08 %. The SE values doubled at 24 (2.15) and 72 (1.92) h. The EE diminished as the number of bags increased, being the values higher for one cow than for two or three cows, but these differences were slight when 10 bags were used. The use of two cows seems reasonable, since the increase in precision from one to two cows was greater than from two to three cows. Three bags were the minimum necessary to estimate the SE value of 1%.Universidad Autónoma de Yucatán2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf1870-0462https://www.redalyc.org/articulo.oa?id=93924626015Tropical and Subtropical Agroecosystems (México) Num.2 Vol.15reponame:Redalyc-UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenhttp://www.redalyc.org/revista.oa?id=939Tropical and Subtropical Agroecosystemsinfo:eu-repo/semantics/openAccessoai:redalyc.org:939246260152025-09-03T18:09:01Z
dc.title.none.fl_str_mv NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
title NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
spellingShingle NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
Epigmenio Castillo-Gallegos
Agrociencias
Kinggrass
dry matter
number of cows
number of bags
In situ degradation
title_short NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
title_full NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
title_fullStr NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
title_full_unstemmed NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
title_sort NUMBER OF COWS AND BAGS NEEDED TO ESTIMATE in situ DRY MATTER DEGRADATION OF KINGGRASS (Pennisetum purpureum) LEAVES
dc.creator.none.fl_str_mv Epigmenio Castillo-Gallegos
Jesús Jarillo-Rodríguez
Ismael Cortes Salazar
Braulio Valles-de la Mora
Eliazar Ocaña-Zavaleta
author Epigmenio Castillo-Gallegos
author_facet Epigmenio Castillo-Gallegos
Jesús Jarillo-Rodríguez
Ismael Cortes Salazar
Braulio Valles-de la Mora
Eliazar Ocaña-Zavaleta
author_role author
author2 Jesús Jarillo-Rodríguez
Ismael Cortes Salazar
Braulio Valles-de la Mora
Eliazar Ocaña-Zavaleta
author2_role author
author
author
author
dc.subject.none.fl_str_mv Agrociencias
Kinggrass
dry matter
number of cows
number of bags
In situ degradation
topic Agrociencias
Kinggrass
dry matter
number of cows
number of bags
In situ degradation
description The number of bags to be incubated per sample, and the number of fistulated cows needed to estimate in situ ruminal degradation of Kinggrass (Pennisetum purpureum) dry matter (DMD %) were determined. Three rumen-fistulated cows and 10 bags per incubation time (3, 6, 9, 12, 24, 48 and 72 h) were used. Five grams of dried leaves were weighed per bag. Variance components for cows (Vc) and bags (Vb) per incubation time were estimated and used to calculate the standard error (SE) of mean DMD. The adequate number of bags to be used was the one that produced a value of 1 % (SE of the study). Precision increased as the number of cows increased, with mean SE of 1.66, 1.18 and 0.96 % for one, two and three cows, respectively. Precision remained more or less constant for incubation times of 3, 6, 9, 12 and 48 h, with respective values of 0.93, 0.81, 1.05, 0.92 and 1.08 %. The SE values doubled at 24 (2.15) and 72 (1.92) h. The EE diminished as the number of bags increased, being the values higher for one cow than for two or three cows, but these differences were slight when 10 bags were used. The use of two cows seems reasonable, since the increase in precision from one to two cows was greater than from two to three cows. Three bags were the minimum necessary to estimate the SE value of 1%.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 1870-0462
https://www.redalyc.org/articulo.oa?id=93924626015
identifier_str_mv 1870-0462
url https://www.redalyc.org/articulo.oa?id=93924626015
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=939
dc.rights.none.fl_str_mv Tropical and Subtropical Agroecosystems
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Tropical and Subtropical Agroecosystems
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Autónoma de Yucatán
publisher.none.fl_str_mv Universidad Autónoma de Yucatán
dc.source.none.fl_str_mv Tropical and Subtropical Agroecosystems (México) Num.2 Vol.15
reponame:Redalyc-UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Redalyc-UNAM
collection Redalyc-UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 14,965156

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