| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
20/06/1995 |
|
Data da última atualização: |
20/06/1995 |
|
Autoria: |
DUNN, T. G.; INGALLS, J. E.; ZIMMERMAN, D. R.; WILTBANK, J. N. |
|
Título: |
Reproductive performance of 2-year-old Hereford and Angus heifers as influenced by pre- and post-calving energy intake. |
|
Ano de publicação: |
1969 |
|
Fonte/Imprenta: |
Journal of Animal Science, v.29, p.719-726, 1969. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The influence of pre- and post-calving energy intake was studied in 203 2-yr.-old heifers (101 Hereford and 102 Angus) nursing their first calves. Two levels of calculated digestible energy (low - 8.7 megcal. and high - 17.3 megcal.) were fed daily before calving. At calving time, the low group was divided into two groups: a low-moderate (L-M) fed 27.3 megcal, and a low-high (L-H) group fed 48.2 negcal, of digestible energy daily. The high precalving group was divided into three groups at calving time and fed three levels of energy daily: high-low (H-L) 14.2 megcal.; high-moderate (H-M) 27.3 megcal. and high-high (H-H) 48.2 megcal. The heifers were assigned to treatment 135 to 142 days prior to calving and remained onn treatment until 120 days after calving. The 60-day breeding season starded 60 days after calving. Results show that level of energy intake can markedly alter reproductive performance in 2-yr.-old heifers nursing their first calves. Pregnancy rate 120 days after calving was directly related to the post-calving energy level. Eighty-seven percent of the cows fed the high energy level after calving were pregnant compared with 72% of those fed the moderate level and 64% of those fed the low energy level (0.01% < P < 0.05). The onset of estrus was delayed in cows receiving the low level of energy before calving. The low pregnancy rate in the cows fed the low energy level after calving occurred because 30% of the Hereford cows and 9% of the Angus cows failed to show estrus (0.01 < P < 0.05). MenosThe influence of pre- and post-calving energy intake was studied in 203 2-yr.-old heifers (101 Hereford and 102 Angus) nursing their first calves. Two levels of calculated digestible energy (low - 8.7 megcal. and high - 17.3 megcal.) were fed daily before calving. At calving time, the low group was divided into two groups: a low-moderate (L-M) fed 27.3 megcal, and a low-high (L-H) group fed 48.2 negcal, of digestible energy daily. The high precalving group was divided into three groups at calving time and fed three levels of energy daily: high-low (H-L) 14.2 megcal.; high-moderate (H-M) 27.3 megcal. and high-high (H-H) 48.2 megcal. The heifers were assigned to treatment 135 to 142 days prior to calving and remained onn treatment until 120 days after calving. The 60-day breeding season starded 60 days after calving. Results show that level of energy intake can markedly alter reproductive performance in 2-yr.-old heifers nursing their first calves. Pregnancy rate 120 days after calving was directly related to the post-calving energy level. Eighty-seven percent of the cows fed the high energy level after calving were pregnant compared with 72% of those fed the moderate level and 64% of those fed the low energy level (0.01% < P < 0.05). The onset of estrus was delayed in cows receiving the low level of energy before calving. The low pregnancy rate in the cows fed the low energy level after calving occurred because 30% of the Hereford cows and 9% of the Angus cows failed to show ... Mostrar Tudo |
|
Palavras-Chave: |
Bovine; l Hereford. |
|
Thesagro: |
Bovino; Reprodução. |
|
Thesaurus Nal: |
Angus; reproduction. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02171naa a2200229 a 4500
001 1784624
005 1995-06-20
008 1969 bl --- 0-- u #d
100 1 $aDUNN, T. G.
245 $aReproductive performance of 2-year-old Hereford and Angus heifers as influenced by pre- and post-calving energy intake.
260 $c1969
520 $aThe influence of pre- and post-calving energy intake was studied in 203 2-yr.-old heifers (101 Hereford and 102 Angus) nursing their first calves. Two levels of calculated digestible energy (low - 8.7 megcal. and high - 17.3 megcal.) were fed daily before calving. At calving time, the low group was divided into two groups: a low-moderate (L-M) fed 27.3 megcal, and a low-high (L-H) group fed 48.2 negcal, of digestible energy daily. The high precalving group was divided into three groups at calving time and fed three levels of energy daily: high-low (H-L) 14.2 megcal.; high-moderate (H-M) 27.3 megcal. and high-high (H-H) 48.2 megcal. The heifers were assigned to treatment 135 to 142 days prior to calving and remained onn treatment until 120 days after calving. The 60-day breeding season starded 60 days after calving. Results show that level of energy intake can markedly alter reproductive performance in 2-yr.-old heifers nursing their first calves. Pregnancy rate 120 days after calving was directly related to the post-calving energy level. Eighty-seven percent of the cows fed the high energy level after calving were pregnant compared with 72% of those fed the moderate level and 64% of those fed the low energy level (0.01% < P < 0.05). The onset of estrus was delayed in cows receiving the low level of energy before calving. The low pregnancy rate in the cows fed the low energy level after calving occurred because 30% of the Hereford cows and 9% of the Angus cows failed to show estrus (0.01 < P < 0.05).
650 $aAngus
650 $areproduction
650 $aBovino
650 $aReprodução
653 $aBovine
653 $al Hereford
700 1 $aINGALLS, J. E.
700 1 $aZIMMERMAN, D. R.
700 1 $aWILTBANK, J. N.
773 $tJournal of Animal Science$gv.29, p.719-726, 1969.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 7 | |
| 1. |  | ROSSI, C. N.; TEIXEIRA, K. R. dos S. Avaliação de ácidos glicônicos totais em cultivo de bactéria fixadora de nitrogênio Gluconacetobacter diazotrophicus In: CONGRESSO LATINOAMERICANO DE MICROBIOLOGIA, ALAM, 32.; CONGRESSO BOLIVIANO DE MICROBIOLOGIA, CCM, 4.; 2014, Cartagena, CO: clínica, bioanálisis industrial, ambiental. Cartagena: Universidad de Antioquia; Associação Colombiana de Microbiologia, 2014. p. 62 Publicado em: Hechos Microbiológicos, v. 5. n.2, suplemento 2, p. 62, noviembre, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrobiologia. |
|   |
| 5. | | SILVA, A. L.; RIBEIRO, H. A. A. da S.; ROSSI, C. N.; TEIXEIRA, K. R. dos S.; JANTALIA, C. P. Desenvolvimento de técnica de coleta a campo de amostras gasosas provenientes da redução de acetileno a etileno realizadas em cultivos celulares explantes de plantas noduladas. In: CONGRESSO LATINOAMERICANO DE MICROBIOLOGIA, ALAM, 32.; CONGRESSO BOLIVIANO DE MICROBIOLOGIA, CCM, 4.; 2014, Cartagena, CO: clínica, bioanálisis industrial, ambiental. Cartagena: Universidad de Antioquia; Associação Colombiana de Microbiologia, 2014. p. 99 Publicado em: Hechos Microbiológicos, v. 5. n.2, suplemento 2, p. 99, noviembre, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrobiologia. |
| |
| 7. | | ROSSI, C. N.; FALCÃO, V. C. A.; LIMA, C. C. S.; SOSA-GÓMEZ, D. R.; ONO, M. A.; HIROOKA, E, Y.; ONO, E. Y. S. Produção e caracterização de exoantígenos de diferentes isolados de Nomuraea rileyi. In: CONGRESO LATINOAMERICANO DE MICOLOGIA, 6., 2008, Mar del Plata. Libro de resúmenes. Buenos Aires: Asociación Latinoamericana de Micologia, 2008. p. 262.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
| |
| Registros recuperados : 7 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
