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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
07/10/1996 |
Data da última atualização: |
03/04/2017 |
Autoria: |
RAKESTRAW, J.; LUSBY, K. S.; WETTEMANN, R. P.; WAGNER, J. J. |
Título: |
Postpartum weight and body condition loss and performance of fall-calving cows. |
Ano de publicação: |
1986 |
Fonte/Imprenta: |
Theriogenology, v.26, n.4, p.461-473, Oct. 1986. |
Idioma: |
Inglês |
Conteúdo: |
A total of 166 mature fall-calving Hereford cows were used to study the effects of weight and body condition losses on the reproduction of cows and on the performance of their calves. This study was conducted before and during the breeding season over a 3-yr period. The cows calved in a good body condition and were assigned to one of the following treatment groups: the MM group to maintain weight from calving (September - October) throught breeding (December - January), the LM group to lose up to 10% of the postpartum weight from calving to the beginning of breeding and to maintain the weight during breeding, and the ML group to maintain weight from calving to the beginning of breeding and to, lose 10 - 15% of the postpartum weight during breeding. Weight losses were ajhusted by altering daily amounts of protein supplement and forage. Cows in the LM treatment group lost 3, 17 and 6% of their postpartum weight before breeding in yr 1, 2, and 3, respectively, and they had a 10-d longer (P<0.05) interval from calving to first estrus than MM or ML group cows. The percentage of cows with ovarian activity at the begginning of breeding was reduced (37 vs 64% P<0.01) for LM compared with MM cows. Treatment-by-year interactions were significant for pregnancy rate and ovarian activity at the end of breeding. In Year 1, ML cows lost 14% of portpartum weight during breeding and had reduced (P<0.01) pregnancy rates compared with MM or LM cows (50 vs 79 and 88%). Only 41% of ML cows in Year 1 had luteal activity after estrus compared to 93% for MM and 79% for LM cows. During Year 2, LM cows lost 17% of postpartum weight before breeding, while ML cows lost 6% of their postpartum weight before breedings and 11% during bredings. Preganancy rates tended to be reduced for both LM and ML cows cpmpared to MM cows (53 and 65 vs 87% P>0.10). The percentage of cows with ovarian activity and the end of breeding was reduced (P<0.05) for the LM treatment group and tended (P>0.10) to be lower for LM than for MM cows. In Year 3, pregnancy rates were greater (89, 84 and 85% for MM, LM and MM, respectively) for all groups. However, the percentage of cows with luteal activity after estrus was greater (P<0.05 for MM (94%) than for LM and ML (64 and 67%). Calf weaning weights (205 d in April) were not significantly influenced by treatment. We conclude that even if cows have adequate energy reserves at calving (good body) condition), optimal reproductive efficiency of fall-calving range cows cannot be ensured. MenosA total of 166 mature fall-calving Hereford cows were used to study the effects of weight and body condition losses on the reproduction of cows and on the performance of their calves. This study was conducted before and during the breeding season over a 3-yr period. The cows calved in a good body condition and were assigned to one of the following treatment groups: the MM group to maintain weight from calving (September - October) throught breeding (December - January), the LM group to lose up to 10% of the postpartum weight from calving to the beginning of breeding and to maintain the weight during breeding, and the ML group to maintain weight from calving to the beginning of breeding and to, lose 10 - 15% of the postpartum weight during breeding. Weight losses were ajhusted by altering daily amounts of protein supplement and forage. Cows in the LM treatment group lost 3, 17 and 6% of their postpartum weight before breeding in yr 1, 2, and 3, respectively, and they had a 10-d longer (P<0.05) interval from calving to first estrus than MM or ML group cows. The percentage of cows with ovarian activity at the begginning of breeding was reduced (37 vs 64% P<0.01) for LM compared with MM cows. Treatment-by-year interactions were significant for pregnancy rate and ovarian activity at the end of breeding. In Year 1, ML cows lost 14% of portpartum weight during breeding and had reduced (P<0.01) pregnancy rates compared with MM or LM cows (50 vs 79 and 88%). Only 41% of ML cows in Ye... Mostrar Tudo |
Palavras-Chave: |
Fall calving. |
Thesagro: |
Gado de Corte; Reprodução. |
Thesaurus Nal: |
beef cattle; body condition; reproduction; weight loss. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03181naa a2200241 a 4500 001 1789806 005 2017-04-03 008 1986 bl --- 0-- u #d 100 1 $aRAKESTRAW, J. 245 $aPostpartum weight and body condition loss and performance of fall-calving cows. 260 $c1986 520 $aA total of 166 mature fall-calving Hereford cows were used to study the effects of weight and body condition losses on the reproduction of cows and on the performance of their calves. This study was conducted before and during the breeding season over a 3-yr period. The cows calved in a good body condition and were assigned to one of the following treatment groups: the MM group to maintain weight from calving (September - October) throught breeding (December - January), the LM group to lose up to 10% of the postpartum weight from calving to the beginning of breeding and to maintain the weight during breeding, and the ML group to maintain weight from calving to the beginning of breeding and to, lose 10 - 15% of the postpartum weight during breeding. Weight losses were ajhusted by altering daily amounts of protein supplement and forage. Cows in the LM treatment group lost 3, 17 and 6% of their postpartum weight before breeding in yr 1, 2, and 3, respectively, and they had a 10-d longer (P<0.05) interval from calving to first estrus than MM or ML group cows. The percentage of cows with ovarian activity at the begginning of breeding was reduced (37 vs 64% P<0.01) for LM compared with MM cows. Treatment-by-year interactions were significant for pregnancy rate and ovarian activity at the end of breeding. In Year 1, ML cows lost 14% of portpartum weight during breeding and had reduced (P<0.01) pregnancy rates compared with MM or LM cows (50 vs 79 and 88%). Only 41% of ML cows in Year 1 had luteal activity after estrus compared to 93% for MM and 79% for LM cows. During Year 2, LM cows lost 17% of postpartum weight before breeding, while ML cows lost 6% of their postpartum weight before breedings and 11% during bredings. Preganancy rates tended to be reduced for both LM and ML cows cpmpared to MM cows (53 and 65 vs 87% P>0.10). The percentage of cows with ovarian activity and the end of breeding was reduced (P<0.05) for the LM treatment group and tended (P>0.10) to be lower for LM than for MM cows. In Year 3, pregnancy rates were greater (89, 84 and 85% for MM, LM and MM, respectively) for all groups. However, the percentage of cows with luteal activity after estrus was greater (P<0.05 for MM (94%) than for LM and ML (64 and 67%). Calf weaning weights (205 d in April) were not significantly influenced by treatment. We conclude that even if cows have adequate energy reserves at calving (good body) condition), optimal reproductive efficiency of fall-calving range cows cannot be ensured. 650 $abeef cattle 650 $abody condition 650 $areproduction 650 $aweight loss 650 $aGado de Corte 650 $aReprodução 653 $aFall calving 700 1 $aLUSBY, K. S. 700 1 $aWETTEMANN, R. P. 700 1 $aWAGNER, J. J. 773 $tTheriogenology$gv.26, n.4, p.461-473, Oct. 1986.
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Embrapa Pantanal (CPAP) |
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Registros recuperados : 24 | |
2. | | RIBEIRO, S. A. M. Secagem e beneficiamento. In: MILHO: informações técnicas.Dourados: EMBRAPA-UEPAE Dourados, 1991. p. 192-199 (Embrapa UEPAE-Dourados. Circular técnica, 20).Biblioteca(s): Embrapa Agropecuária Oeste. |
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6. | | SILVA, L. C. da; LEMOS, W. de P.; RIBEIRO, S. A.; ARAÚJO, M. R. de. Efeito da pluviometria na diversidade e abundância de formigas predadoras em açaizeiros (Euterpe oleraceae Mart) no município de Marapanim, Pará. In: SIMPÓSIO DE CONTROLE BIOLÓGICO, 13., 2013, Bonito, MS. Faça bonito: use controle biológico: anais. Brasília, DF: Embrapa, 2013. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
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8. | | RIBEIRO, S. A.; YOKOYAMA, L. P.; IGREJA, A. C. M.; ROCHA, M. B. Diagnóstico do perfil do produtor de arroz do Estado de Mato Grosso do Sul. In: CONFERÊNCIA INTERNACIONAL DE ARROZ PARA A AMÉRICA LATINA E O CARIBE, 9.; REUNIÃO NACIONAL DE PESQUISA DE ARROZ, 5., 1994, Goiânia. Arroz na América Latina: perspectivas para o incremento da produção e do potencial produtivo: pôsteres e grupos de trabalho. Goiânia: Embrapa-CNPAF, 1996. v.2. p. 218. (Embrapa-CNPAF. Documentos, 62).Tipo: Resumo em Anais de Congresso |
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13. | | SILVA, L. C. da; LEMOS, W. de P.; RIBEIRO, S. A.; ARAÚJO, M. R. de; OLIVEIRA, T. A. de. Diversidade de aranhas predadoras em cultivo de açaizeiro (Euterpe Oleraceae Mart.) no município de Marapanim, Pará. In: SIMPÓSIO DE CONTROLE BIOLÓGICO, 13., 2013, Bonito, MS. Faça bonito: use controle biológico: anais. Brasília, DF: Embrapa, 2013. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
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14. | | GOMES, E. O. G.; GOMES, N. S. B.; RIBEIRO, S. A. L.; MOREIRA, A. F.; AUER, C. G. Diversidade de fungos na madeira de cinco espécies florestais no Município de Rio Branco, Acre, Brasil. Tropical Plant Pathology, Brasília, DF, v. 37, 2012. 1 CD-ROM. Suplemento. Edição do 45º Congresso Brasileiro de Fitopatologia, 2012, Manaus. Micologia. Resumo 211.Tipo: Resumo em Anais de Congresso |
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18. | | MEDEIROS, L. R. A.; RIBEIRO, S. A.; SANTANA, B. dos S.; RISSO, I. A. M.; AMÂNCIO, R.; AMANCIO, C. O. da G. Análise econômica-ecológica de agroecossitemas como ferramenta para a compreensão da dinâmica da transição agroecológica para fins de gestão Ecological economical analysis of agroecosystems as a tool for understanding the dynamics of the agroecological transition to management. Cadernos de Agroecologia, v. 13, n. 1, p. 1-7, Jul. 2018. ANAIS CONGRESSO LATINO-AMERICANO DE AGROECOLOGIA, 6.; CONGRESSO BRASILEIRO DE AGROECOLOGIA, 10.; SEMINÁRIO DE AGROECOLOGIA DO DISTRITO FEDERAL E ENTORNO, 5., 2017, Brasília, DF. Agroecologia na transformação dos sistemas agroalimentares...Tipo: Artigo em Anais de Congresso |
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19. | | MEDEIROS, L. R. A.; RIBEIRO, S. A.; SANTANA, B. D.; RISSO, I. A. M.; AMANCIO, R.; AMANCIO, C. O. da G. A análise econômico-ecológica de um agroecossistema no município de Paraty-RJ como ferramenta de planejamento e apoio à transição agroecológica para fins de gestão. Cadernos de Agroecologia v. 13, n. 1, p. 1-7, Jul. 2018. Edição dos Anais do VI Congresso Latino-americano de Agroecologia; X Congresso Brasileiro de Agroecologia; V Seminário de Agroecologia do Distrito Federal e Entorno, Brasília, DF, set. 2017.Tipo: Artigo em Anais de Congresso |
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