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| 15. |  | CONCENCO, G.; PARFITT, J. M. B.; DOWNING, K.; LARUE, J.; SILVA, J. T. da. Rice development and water demand under drought stress imposed at distinct growth stages. African Journal of Agricultural Research, v. 11, n. 41, p. 4147-4156, 13 October, 2016.| Biblioteca(s): Embrapa Clima Temperado. |
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Registro Completo
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
29/06/2023 |
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Data da última atualização: |
01/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
PFEIFER, L. F. M.; LIMA, R. A. de; NAKASHIMA, S. H.; SILVA, J. T. da; SCHMITT, E. |
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Afiliação: |
LUIZ FRANCISCO MACHADO PFEIFER, CPAF-RO; RHUAN AMORIM DE LIMA, CPAF-RO; SIDNEI HIROKI NAKASHIMA, DELAVAL BRASIL LTDA; JACKELINE THAÍS DA SILVA, DELAVAL BRASIL LTDA; EDUARDO SCHMITT, UNIVERSIDADE FEDERAL DE PELOTAS. |
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Título: |
Early versus late body condition score loss in dairy cows: reproductive performance. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Tropical Animal Health and Production, v. 55, article 149, Apr. 2023. |
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DOI: |
https://doi.org/10.1007/s11250-023-03559-7 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to compare milk production and reproductive performance in high yield Holstein cows that lose BCS early and late in the postpartum period. Lactating dairy cows (n = 76) were received frst timed AI at 60 to 75 DIM using the farm-managed estradiol-progesterone-GnRH?based timed AI protocol. The BCS of all cows was daily evaluated by automated BCS cameras. Aiming to evaluate the efect of the days in milk (DIM) in which a cow reached the nadir BCS on the reproductive parameters, cows were separated into two groups: early BCS loss (n = 42), cows that reached the nadir BCS ≤ 34 DIM, and late BCS loss (n = 34), cows that reached the nadir BCS > 34 DIM. The optimal cut-of point for determining the relationship between days to nadir BCS and pregnancy by 150 DIM (P150) was calculated using the receiver operating characteristic (ROC) curve. From the ROC analysis, the cut-of was 34 DIM (Se, 80.9%; Sp, 66.7%; AUC, 0.74; P < 0.01). No diferences (P>0.05) were detected between groups on the BCS and milk production. The average of milk production in both groups was 46.65 ± 6.15 Kg/day. Cows that reached the nadir BCS early postpartum presented lower (P < 0.01) calving interval and greater (P < 0.01) pregnancy at frst AI and P150. In summary, cows that lost BCS early had better reproductive performance and had similar milk yield compared with cows that lost BCS late in the postpartum period. |
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Palavras-Chave: |
Carambeí (PR); Fazenda leiteira; Paraná. |
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Thesagro: |
Condição Corporal; Inseminação Artificial; Ovulação; Pós-Parto; Prenhez; Produção Leiteira; Reprodução Animal; Vaca Leiteira. |
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Thesaurus NAL: |
Animal reproduction; Artificial insemination; Body condition; Dairy cows; Milk production; Ovulation; Postpartum period; Pregnancy. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154710/1/cpafro-18959.pdf
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|
Marc: |
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024 7 $ahttps://doi.org/10.1007/s11250-023-03559-7$2DOI
100 1 $aPFEIFER, L. F. M.
245 $aEarly versus late body condition score loss in dairy cows$breproductive performance.$h[electronic resource]
260 $c2023
520 $aThis study aimed to compare milk production and reproductive performance in high yield Holstein cows that lose BCS early and late in the postpartum period. Lactating dairy cows (n = 76) were received frst timed AI at 60 to 75 DIM using the farm-managed estradiol-progesterone-GnRH?based timed AI protocol. The BCS of all cows was daily evaluated by automated BCS cameras. Aiming to evaluate the efect of the days in milk (DIM) in which a cow reached the nadir BCS on the reproductive parameters, cows were separated into two groups: early BCS loss (n = 42), cows that reached the nadir BCS ≤ 34 DIM, and late BCS loss (n = 34), cows that reached the nadir BCS > 34 DIM. The optimal cut-of point for determining the relationship between days to nadir BCS and pregnancy by 150 DIM (P150) was calculated using the receiver operating characteristic (ROC) curve. From the ROC analysis, the cut-of was 34 DIM (Se, 80.9%; Sp, 66.7%; AUC, 0.74; P < 0.01). No diferences (P>0.05) were detected between groups on the BCS and milk production. The average of milk production in both groups was 46.65 ± 6.15 Kg/day. Cows that reached the nadir BCS early postpartum presented lower (P < 0.01) calving interval and greater (P < 0.01) pregnancy at frst AI and P150. In summary, cows that lost BCS early had better reproductive performance and had similar milk yield compared with cows that lost BCS late in the postpartum period.
650 $aAnimal reproduction
650 $aArtificial insemination
650 $aBody condition
650 $aDairy cows
650 $aMilk production
650 $aOvulation
650 $aPostpartum period
650 $aPregnancy
650 $aCondição Corporal
650 $aInseminação Artificial
650 $aOvulação
650 $aPós-Parto
650 $aPrenhez
650 $aProdução Leiteira
650 $aReprodução Animal
650 $aVaca Leiteira
653 $aCarambeí (PR)
653 $aFazenda leiteira
653 $aParaná
700 1 $aLIMA, R. A. de
700 1 $aNAKASHIMA, S. H.
700 1 $aSILVA, J. T. da
700 1 $aSCHMITT, E.
773 $tTropical Animal Health and Production$gv. 55, article 149, Apr. 2023.
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