Growth and reproductive performance of 14- to 15-month-old Hereford heifers
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/185943 |
Resumo: | Aiming at breeding heifers with 14-15 months of age, 100 Hereford calves were subjected to different feeding systems. Heifers grazed on a natural pasture in early winter, fed or not a supplement (14% crude protein; 72% total digestible nutrients), were transferred to a ryegrass pasture for 73 days, and then returned to a natural pasture for 15 days until the beginning of the breeding season. During the last 15 days on ryegrass pasture and the 15 days of the return to the natural pasture, half of the heifers of the two previous systems were offered the supplement, thereby establishing four feeding treatments. Heifers supplemented during the second period, independently of supplementation during the first grazing period, presented higher average daily gain and greater backfat values than the non-supplemented heifers. The breeding season extended for 75 days. At the start of the breeding season (November 18), heifers supplemented during both periods presented higher body condition score and body weight. The highest percentage of puberty was determined in heifers supplemented in the early winter. Heifers supplemented during both periods presented the highest pregnancy rate. Pregnant heifers presented higher average daily gain when fed the supplement during the second period, as well as higher relative pelvic area, body weight, and body condition score at the start and end of the breeding season. To an expressive pregnancy in 14- to 15- month-old heifers, higher weaning weights and pasture allowance are required to get a better answer to supplements offered. |
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Landarin, Carolini MachadoLobato, Jose Fernando PivaTarouco, Adriana KroefTarouco, Jaime UrdapilletaEloy, Lidiane RaquelPotter, LucianaRosa, Antônio Augusto Galarza2018-12-05T02:44:22Z20161516-3598http://hdl.handle.net/10183/185943001079280Aiming at breeding heifers with 14-15 months of age, 100 Hereford calves were subjected to different feeding systems. Heifers grazed on a natural pasture in early winter, fed or not a supplement (14% crude protein; 72% total digestible nutrients), were transferred to a ryegrass pasture for 73 days, and then returned to a natural pasture for 15 days until the beginning of the breeding season. During the last 15 days on ryegrass pasture and the 15 days of the return to the natural pasture, half of the heifers of the two previous systems were offered the supplement, thereby establishing four feeding treatments. Heifers supplemented during the second period, independently of supplementation during the first grazing period, presented higher average daily gain and greater backfat values than the non-supplemented heifers. The breeding season extended for 75 days. At the start of the breeding season (November 18), heifers supplemented during both periods presented higher body condition score and body weight. The highest percentage of puberty was determined in heifers supplemented in the early winter. Heifers supplemented during both periods presented the highest pregnancy rate. Pregnant heifers presented higher average daily gain when fed the supplement during the second period, as well as higher relative pelvic area, body weight, and body condition score at the start and end of the breeding season. To an expressive pregnancy in 14- to 15- month-old heifers, higher weaning weights and pasture allowance are required to get a better answer to supplements offered.application/pdfengRevista brasileira de zootecnia. Viçosa, MG. Vol. 45, n. 11 (2016), p. 667-676PerformanceProdução animalBackfat thicknessNatural pasturePelvic areaReproductive tract scoreRib eye areaSupplementationGrowth and reproductive performance of 14- to 15-month-old Hereford heifersinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001079280.pdf.txt001079280.pdf.txtExtracted Texttext/plain46291http://www.lume.ufrgs.br/bitstream/10183/185943/2/001079280.pdf.txtb557d7daa79d40712746f91043dd8db8MD52ORIGINAL001079280.pdfTexto completo (inglês)application/pdf300149http://www.lume.ufrgs.br/bitstream/10183/185943/1/001079280.pdf2726e4a6c8f76e11105475848cb5276eMD5110183/1859432018-12-06 02:44:34.678133oai:www.lume.ufrgs.br:10183/185943Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-12-06T04:44:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
title |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
spellingShingle |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers Landarin, Carolini Machado Performance Produção animal Backfat thickness Natural pasture Pelvic area Reproductive tract score Rib eye area Supplementation |
title_short |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
title_full |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
title_fullStr |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
title_full_unstemmed |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
title_sort |
Growth and reproductive performance of 14- to 15-month-old Hereford heifers |
author |
Landarin, Carolini Machado |
author_facet |
Landarin, Carolini Machado Lobato, Jose Fernando Piva Tarouco, Adriana Kroef Tarouco, Jaime Urdapilleta Eloy, Lidiane Raquel Potter, Luciana Rosa, Antônio Augusto Galarza |
author_role |
author |
author2 |
Lobato, Jose Fernando Piva Tarouco, Adriana Kroef Tarouco, Jaime Urdapilleta Eloy, Lidiane Raquel Potter, Luciana Rosa, Antônio Augusto Galarza |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Landarin, Carolini Machado Lobato, Jose Fernando Piva Tarouco, Adriana Kroef Tarouco, Jaime Urdapilleta Eloy, Lidiane Raquel Potter, Luciana Rosa, Antônio Augusto Galarza |
dc.subject.por.fl_str_mv |
Performance Produção animal |
topic |
Performance Produção animal Backfat thickness Natural pasture Pelvic area Reproductive tract score Rib eye area Supplementation |
dc.subject.eng.fl_str_mv |
Backfat thickness Natural pasture Pelvic area Reproductive tract score Rib eye area Supplementation |
description |
Aiming at breeding heifers with 14-15 months of age, 100 Hereford calves were subjected to different feeding systems. Heifers grazed on a natural pasture in early winter, fed or not a supplement (14% crude protein; 72% total digestible nutrients), were transferred to a ryegrass pasture for 73 days, and then returned to a natural pasture for 15 days until the beginning of the breeding season. During the last 15 days on ryegrass pasture and the 15 days of the return to the natural pasture, half of the heifers of the two previous systems were offered the supplement, thereby establishing four feeding treatments. Heifers supplemented during the second period, independently of supplementation during the first grazing period, presented higher average daily gain and greater backfat values than the non-supplemented heifers. The breeding season extended for 75 days. At the start of the breeding season (November 18), heifers supplemented during both periods presented higher body condition score and body weight. The highest percentage of puberty was determined in heifers supplemented in the early winter. Heifers supplemented during both periods presented the highest pregnancy rate. Pregnant heifers presented higher average daily gain when fed the supplement during the second period, as well as higher relative pelvic area, body weight, and body condition score at the start and end of the breeding season. To an expressive pregnancy in 14- to 15- month-old heifers, higher weaning weights and pasture allowance are required to get a better answer to supplements offered. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2018-12-05T02:44:22Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/185943 |
dc.identifier.issn.pt_BR.fl_str_mv |
1516-3598 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001079280 |
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url |
http://hdl.handle.net/10183/185943 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia. Viçosa, MG. Vol. 45, n. 11 (2016), p. 667-676 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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