Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.uco.es/organiza/servicios/publica/az/php/img/web/16_14_49_16ComparacoesSoares.pdf http://hdl.handle.net/11449/70490 |
Resumo: | This work aimed to compare intake prediction equations with values obtained by direct methods using chopped elephant-grass offered to crossbreed lactating cows with rumen canulas. The experimental design was a 3 x 3 Latin square (three animals and three cutting ages: 30, 45 and 60 days). The equations used for intake prediction (y) were: (1) y= -1.19 + 0.035(a+b) + 28.5c; (2) y= [%NDF on DM]*[NDF intake]/[(1- a - b)/KP+b/(c+kp)]/24; (3) y= -0.822 + 0.0748(a+b) + 40.7c and (4) equation 2 with values of intake measured directly. The predictions of NDF intake by equations were not different among treatments, instead of the difference among values measured directly: the 30 day-old had lower intake (5.29 kg/day) in relation to 45 (6.57 kg/day) and 60 (7.31 kg/day) day-old grasses. In general, equations overestimated the DM intake in relation to direct measuring (9.0 kg/cow/day), with exception of equation 3 which underestimated the intake (7.7 kg/day). The means of DM intake found by equations 1 and 2 (13.7 and 13.4 kg/cow/day, respectively) were similar between themselves and superior in relation to those found by equation 4 (9.7 kg/cow/day). The intakes measured directly were similar to those found in equation 4 and higher than those found by equation 3. The mean of rumen fill of 7.5 kg was superior to those of 5.2 kg estimated by equation. The prediction equations based on in situ degradability parameters do not supply estimates of DM intake, NDF intake and rumen fill in agreement with values obtained by direct methods. |
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Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantesComparisons among equations for intake prediction of lactating cows fed chopped elephant-grassPassage rateRumen emptyingRumen fillAnimaliaPennisetum purpureumPoaceaeThis work aimed to compare intake prediction equations with values obtained by direct methods using chopped elephant-grass offered to crossbreed lactating cows with rumen canulas. The experimental design was a 3 x 3 Latin square (three animals and three cutting ages: 30, 45 and 60 days). The equations used for intake prediction (y) were: (1) y= -1.19 + 0.035(a+b) + 28.5c; (2) y= [%NDF on DM]*[NDF intake]/[(1- a - b)/KP+b/(c+kp)]/24; (3) y= -0.822 + 0.0748(a+b) + 40.7c and (4) equation 2 with values of intake measured directly. The predictions of NDF intake by equations were not different among treatments, instead of the difference among values measured directly: the 30 day-old had lower intake (5.29 kg/day) in relation to 45 (6.57 kg/day) and 60 (7.31 kg/day) day-old grasses. In general, equations overestimated the DM intake in relation to direct measuring (9.0 kg/cow/day), with exception of equation 3 which underestimated the intake (7.7 kg/day). The means of DM intake found by equations 1 and 2 (13.7 and 13.4 kg/cow/day, respectively) were similar between themselves and superior in relation to those found by equation 4 (9.7 kg/cow/day). The intakes measured directly were similar to those found in equation 4 and higher than those found by equation 3. The mean of rumen fill of 7.5 kg was superior to those of 5.2 kg estimated by equation. The prediction equations based on in situ degradability parameters do not supply estimates of DM intake, NDF intake and rumen fill in agreement with values obtained by direct methods.Embrapa Agrobiologia, BR 465. Km 7, Seropédica-RJ. CEP 78900-970Departamento de Zootecnia FCAV/UNESP, Jaboticabal/SPEmbrapa Rondônia, BR 364. Km 5,5, Porto Velho-RO. CEP 78900-970Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610, CEP 36038-330Instituto de Florestas Departamento de Engenharia Agrícola UFRRJ, BR 465. km 7, Seroédica- RJDepartamento de Zootecnia FCAV/UNESP, Jaboticabal/SPEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Universidade Estadual Paulista (Unesp)Universidade Federal Rural do Rio de Janeiro (UFRRJ)Soares, J. P GBerchielli, Telma Teresinha [UNESP]Salman, A. K DDeresz, F.Oliveira, A. D.Verneque, R. S.2014-05-27T11:23:36Z2014-05-27T11:23:36Z2008-07-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article235-246http://www.uco.es/organiza/servicios/publica/az/php/img/web/16_14_49_16ComparacoesSoares.pdfArchivos de Zootecnia, v. 57, n. 218, p. 235-246, 2008.0004-05921885-4494http://hdl.handle.net/11449/704902-s2.0-476490850195317385915649516Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporArchivos de Zootecnia0,202info:eu-repo/semantics/openAccess2021-10-22T20:03:55Zoai:repositorio.unesp.br:11449/70490Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T20:03:55Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes Comparisons among equations for intake prediction of lactating cows fed chopped elephant-grass |
title |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
spellingShingle |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes Soares, J. P G Passage rate Rumen emptying Rumen fill Animalia Pennisetum purpureum Poaceae |
title_short |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
title_full |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
title_fullStr |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
title_full_unstemmed |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
title_sort |
Comparações entre equações de predição de consumo de capim-elefante cortado para vacas lactantes |
author |
Soares, J. P G |
author_facet |
Soares, J. P G Berchielli, Telma Teresinha [UNESP] Salman, A. K D Deresz, F. Oliveira, A. D. Verneque, R. S. |
author_role |
author |
author2 |
Berchielli, Telma Teresinha [UNESP] Salman, A. K D Deresz, F. Oliveira, A. D. Verneque, R. S. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Universidade Estadual Paulista (Unesp) Universidade Federal Rural do Rio de Janeiro (UFRRJ) |
dc.contributor.author.fl_str_mv |
Soares, J. P G Berchielli, Telma Teresinha [UNESP] Salman, A. K D Deresz, F. Oliveira, A. D. Verneque, R. S. |
dc.subject.por.fl_str_mv |
Passage rate Rumen emptying Rumen fill Animalia Pennisetum purpureum Poaceae |
topic |
Passage rate Rumen emptying Rumen fill Animalia Pennisetum purpureum Poaceae |
description |
This work aimed to compare intake prediction equations with values obtained by direct methods using chopped elephant-grass offered to crossbreed lactating cows with rumen canulas. The experimental design was a 3 x 3 Latin square (three animals and three cutting ages: 30, 45 and 60 days). The equations used for intake prediction (y) were: (1) y= -1.19 + 0.035(a+b) + 28.5c; (2) y= [%NDF on DM]*[NDF intake]/[(1- a - b)/KP+b/(c+kp)]/24; (3) y= -0.822 + 0.0748(a+b) + 40.7c and (4) equation 2 with values of intake measured directly. The predictions of NDF intake by equations were not different among treatments, instead of the difference among values measured directly: the 30 day-old had lower intake (5.29 kg/day) in relation to 45 (6.57 kg/day) and 60 (7.31 kg/day) day-old grasses. In general, equations overestimated the DM intake in relation to direct measuring (9.0 kg/cow/day), with exception of equation 3 which underestimated the intake (7.7 kg/day). The means of DM intake found by equations 1 and 2 (13.7 and 13.4 kg/cow/day, respectively) were similar between themselves and superior in relation to those found by equation 4 (9.7 kg/cow/day). The intakes measured directly were similar to those found in equation 4 and higher than those found by equation 3. The mean of rumen fill of 7.5 kg was superior to those of 5.2 kg estimated by equation. The prediction equations based on in situ degradability parameters do not supply estimates of DM intake, NDF intake and rumen fill in agreement with values obtained by direct methods. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-07-25 2014-05-27T11:23:36Z 2014-05-27T11:23:36Z |
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://www.uco.es/organiza/servicios/publica/az/php/img/web/16_14_49_16ComparacoesSoares.pdf Archivos de Zootecnia, v. 57, n. 218, p. 235-246, 2008. 0004-0592 1885-4494 http://hdl.handle.net/11449/70490 2-s2.0-47649085019 5317385915649516 |
url |
http://www.uco.es/organiza/servicios/publica/az/php/img/web/16_14_49_16ComparacoesSoares.pdf http://hdl.handle.net/11449/70490 |
identifier_str_mv |
Archivos de Zootecnia, v. 57, n. 218, p. 235-246, 2008. 0004-0592 1885-4494 2-s2.0-47649085019 5317385915649516 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Archivos de Zootecnia 0,202 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
235-246 |
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 |
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1792961545697755136 |