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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
14/12/1998 |
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Data da última atualização: |
18/12/1998 |
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Autoria: |
MOORE, C. P.; ROCHA, C. M. C. da. |
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Título: |
Reproductive performance of Gyr cows: the effect of weaning age of calves and postpartum energy intake. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Journal of Animal Science, Champaign, v.57, n.4, p.807-814, 1983. |
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Idioma: |
Inglês |
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Conteúdo: |
Two nutritional levels following parturition and five weaning ages for the calf were evaluated to study their effect of reproduction in Gyr cows in the savannas of West Central Brazil (Campos Cerrados). Early weaning of calves reduced postpartum weight losses and shortened the postpartum interval to conception. Energy level did not affect cow weight at weaning or conception, the number of days from parturition to firs estrus or the number of matings/ conception; however, the postpartum period to conception was reduced (116 vs 160 d P<05) for cows on the higher energy diet. Weaning age significantly affected postpartum weight loss in cows. Six months after calving, cows that nursed calves for 1 mo were 89 kg heavier than those that nursed calves for 6 mo (384 vs 295 kg; P<05). Cows that were nursed for 1 moreturned to estrus at an average of 40 d postpartum, which 23 d earlier (P<05) than the average of the other groups nursed for longer periods of time. There was no significant difference in the postpartum period to conception among cows that had their calves weaned at 1 mo, 3 mo and cows which were nursed twice daily beginning 30 d after parturition (57, 94 and 97 d, respectively) but was less (P<.05) for cows nursed for 5 or 6 mo (212 and 231 d, for cows nursed for 5 or 6 mo (212 and 231 d, respctively). The results show that Gyr cattle are genetically capable of respondig reproductively to improve nutrition and reduced lactation stress achieved through early weanig or controlled nursing. (key words: Bovine, Gyr, Reproduction, Early Weaning, Energy, Controlled Nursing). MenosTwo nutritional levels following parturition and five weaning ages for the calf were evaluated to study their effect of reproduction in Gyr cows in the savannas of West Central Brazil (Campos Cerrados). Early weaning of calves reduced postpartum weight losses and shortened the postpartum interval to conception. Energy level did not affect cow weight at weaning or conception, the number of days from parturition to firs estrus or the number of matings/ conception; however, the postpartum period to conception was reduced (116 vs 160 d P<05) for cows on the higher energy diet. Weaning age significantly affected postpartum weight loss in cows. Six months after calving, cows that nursed calves for 1 mo were 89 kg heavier than those that nursed calves for 6 mo (384 vs 295 kg; P<05). Cows that were nursed for 1 moreturned to estrus at an average of 40 d postpartum, which 23 d earlier (P<05) than the average of the other groups nursed for longer periods of time. There was no significant difference in the postpartum period to conception among cows that had their calves weaned at 1 mo, 3 mo and cows which were nursed twice daily beginning 30 d after parturition (57, 94 and 97 d, respectively) but was less (P<.05) for cows nursed for 5 or 6 mo (212 and 231 d, for cows nursed for 5 or 6 mo (212 and 231 d, respctively). The results show that Gyr cattle are genetically capable of respondig reproductively to improve nutrition and reduced lactation stress achieved through early weanig or con... Mostrar Tudo |
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Palavras-Chave: |
Claves; Gado Gyr. |
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Thesagro: |
Cerrado; Desmama; Novilho; Parto; Reprodução Animal; Vaca. |
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Thesaurus Nal: |
animal reproduction; calves; cows; parturition; weaning. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02363naa a2200289 a 4500
001 1544242
005 1998-12-18
008 1983 bl --- 0-- u #d
100 1 $aMOORE, C. P.
245 $aReproductive performance of Gyr cows$bthe effect of weaning age of calves and postpartum energy intake.
260 $c1983
520 $aTwo nutritional levels following parturition and five weaning ages for the calf were evaluated to study their effect of reproduction in Gyr cows in the savannas of West Central Brazil (Campos Cerrados). Early weaning of calves reduced postpartum weight losses and shortened the postpartum interval to conception. Energy level did not affect cow weight at weaning or conception, the number of days from parturition to firs estrus or the number of matings/ conception; however, the postpartum period to conception was reduced (116 vs 160 d P<05) for cows on the higher energy diet. Weaning age significantly affected postpartum weight loss in cows. Six months after calving, cows that nursed calves for 1 mo were 89 kg heavier than those that nursed calves for 6 mo (384 vs 295 kg; P<05). Cows that were nursed for 1 moreturned to estrus at an average of 40 d postpartum, which 23 d earlier (P<05) than the average of the other groups nursed for longer periods of time. There was no significant difference in the postpartum period to conception among cows that had their calves weaned at 1 mo, 3 mo and cows which were nursed twice daily beginning 30 d after parturition (57, 94 and 97 d, respectively) but was less (P<.05) for cows nursed for 5 or 6 mo (212 and 231 d, for cows nursed for 5 or 6 mo (212 and 231 d, respctively). The results show that Gyr cattle are genetically capable of respondig reproductively to improve nutrition and reduced lactation stress achieved through early weanig or controlled nursing. (key words: Bovine, Gyr, Reproduction, Early Weaning, Energy, Controlled Nursing).
650 $aanimal reproduction
650 $acalves
650 $acows
650 $aparturition
650 $aweaning
650 $aCerrado
650 $aDesmama
650 $aNovilho
650 $aParto
650 $aReprodução Animal
650 $aVaca
653 $aClaves
653 $aGado Gyr
700 1 $aROCHA, C. M. C. da
773 $tJournal of Animal Science, Champaign$gv.57, n.4, p.807-814, 1983.
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Embrapa Cerrados (CPAC) |
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