The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/16521 |
Resumo: | The objective of this experiment was to evaluate the effect of three different weaning ages on the calving intervals (CI) of Nellore cows. It was carried out from July 1977 through July 1982 and envolved two groups of 51 cows, one in a Jaraguá pasture (Hyparrhenia rufa) and the other in a native pasture. The calves in each herd were weaned at three, five and seven months of age. The CI estimated overall mean was 422 ± 5 days. Year of parturition, pasture, parturition order, season of conception and weaning age had significant (P < 0.05) effects on Cl. The CI was higher in native (434 days) than in Jaraguá pasture (411 days). There were no differences among CI of cows from 2nd through 7th parturition order. The increased CI up to 7th parturition order was associated with poor body conditions of older cows. The effects of season of conception on calving intervals were discussed based on the related season of parturition. The shortest CI (393 days) was observed on cows calving from September through December. The CI of cows that weaned calves with seven months of age (448 days) was longer than those whose calves were weaned at five (414 days) and three months (406 days)- This result probably is associated with more favorable pre-partum weight gain variations. |
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The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pasturesEfeito da idade de desmama sobre o desempenho reprodutivo de vacas Nelore criadas em pastagens de campo nativo e jaraguáearly weaning; calf crop; calving Intervaldesmama precoce; criação de bezerros; intervalo entre partosThe objective of this experiment was to evaluate the effect of three different weaning ages on the calving intervals (CI) of Nellore cows. It was carried out from July 1977 through July 1982 and envolved two groups of 51 cows, one in a Jaraguá pasture (Hyparrhenia rufa) and the other in a native pasture. The calves in each herd were weaned at three, five and seven months of age. The CI estimated overall mean was 422 ± 5 days. Year of parturition, pasture, parturition order, season of conception and weaning age had significant (P < 0.05) effects on Cl. The CI was higher in native (434 days) than in Jaraguá pasture (411 days). There were no differences among CI of cows from 2nd through 7th parturition order. The increased CI up to 7th parturition order was associated with poor body conditions of older cows. The effects of season of conception on calving intervals were discussed based on the related season of parturition. The shortest CI (393 days) was observed on cows calving from September through December. The CI of cows that weaned calves with seven months of age (448 days) was longer than those whose calves were weaned at five (414 days) and three months (406 days)- This result probably is associated with more favorable pre-partum weight gain variations.O objetivo do presente trabalho foi o de testar três idades de desmama, em regime exclusivo de pasto, na tentativa de diminuir o intervalo entre partos (IEP') das matrizes. O experimento, conduzido no período de julho de 1977 a julho de 1982, envolveu dois grupos de 51 vacas Nelore: um, em pastagem de Jaraguá, e outro, em campo nativo; seus bezerros foram desmamados aos três, cinco e sete meses de idade. A média geral do IEP foi estimada em 422 ± 5 dias. A análise de variância evidenciou efeitos significativos (P < 0,05) do ano do parto, tipo de pasto, ordem de parição, época de fecundação e idade da desmama sobre os IEPs. O IEP observado no campo nativo (434 dias) foi mais elevado que no do Jaraguá (411 dias). Não se observaram diferenças de IEP de vacas da segunda até a sétima ordem de parição. O aumento do IEP a partir da sétima ordem deve estar associado à queda nas condições corporais das vacas, em decorrência da idade. As diferenças de IEP em função da época de fecundação são discutidas, levando-se em consideração as épocas de parição correspondentes. O IEP mais curto (393 dias) foi observado em vacas paridas entre setembro e dezembro. O IEP correspondente à desmama de sete meses (448 dias) foi mais elevado (P < 0,05) que os da desmama de cinco meses (414 dias) e de três meses de idade (406 dias). Vacas destes dois últimos grupos apresentaram, em relação às demais, oscilações mais favoráveis de peso pré-parto, o que propiciou menor período de serviço.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAroeira, José A. D. C.Rosa, Antonio do N.Verneque, Rui da S.2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16521Pesquisa Agropecuaria Brasileira; v.24, n.11, nov. 1989; 1343-1348Pesquisa Agropecuária Brasileira; v.24, n.11, nov. 1989; 1343-13481678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16521/10791info:eu-repo/semantics/openAccess2014-08-29T18:45:50Zoai:ojs.seer.sct.embrapa.br:article/16521Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-29T18:45:50Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures Efeito da idade de desmama sobre o desempenho reprodutivo de vacas Nelore criadas em pastagens de campo nativo e jaraguá |
title |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
spellingShingle |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures Aroeira, José A. D. C. early weaning; calf crop; calving Interval desmama precoce; criação de bezerros; intervalo entre partos |
title_short |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
title_full |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
title_fullStr |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
title_full_unstemmed |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
title_sort |
The effect of weaning age on the reproductive performance of Nellore cows raised in native and jaraguá pastures |
author |
Aroeira, José A. D. C. |
author_facet |
Aroeira, José A. D. C. Rosa, Antonio do N. Verneque, Rui da S. |
author_role |
author |
author2 |
Rosa, Antonio do N. Verneque, Rui da S. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Aroeira, José A. D. C. Rosa, Antonio do N. Verneque, Rui da S. |
dc.subject.por.fl_str_mv |
early weaning; calf crop; calving Interval desmama precoce; criação de bezerros; intervalo entre partos |
topic |
early weaning; calf crop; calving Interval desmama precoce; criação de bezerros; intervalo entre partos |
description |
The objective of this experiment was to evaluate the effect of three different weaning ages on the calving intervals (CI) of Nellore cows. It was carried out from July 1977 through July 1982 and envolved two groups of 51 cows, one in a Jaraguá pasture (Hyparrhenia rufa) and the other in a native pasture. The calves in each herd were weaned at three, five and seven months of age. The CI estimated overall mean was 422 ± 5 days. Year of parturition, pasture, parturition order, season of conception and weaning age had significant (P < 0.05) effects on Cl. The CI was higher in native (434 days) than in Jaraguá pasture (411 days). There were no differences among CI of cows from 2nd through 7th parturition order. The increased CI up to 7th parturition order was associated with poor body conditions of older cows. The effects of season of conception on calving intervals were discussed based on the related season of parturition. The shortest CI (393 days) was observed on cows calving from September through December. The CI of cows that weaned calves with seven months of age (448 days) was longer than those whose calves were weaned at five (414 days) and three months (406 days)- This result probably is associated with more favorable pre-partum weight gain variations. |
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/16521 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16521 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16521/10791 |
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.24, n.11, nov. 1989; 1343-1348 Pesquisa Agropecuária Brasileira; v.24, n.11, nov. 1989; 1343-1348 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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1793416663475945472 |