INFLUENCE OF HIGH DRY MATTER INTAKE ON THE SUPEROVULATORY RESPONSE OF CROSSBRED COWS

Authors

  • Michele Ricieri Bastos FMVZ-Unesp, Botucatu
  • Alexandre Floriani Ramos Embrapa Recursos Genéticos e Biotecnologia
  • Katlen Driessen Embrapa Recursos Genéticos e Biotecnologia
  • Aline Carvalho Martins FMVZ-Unesp, Botucatu
  • Rodolfo Rumpf Embrapa Recursos Genéticos e Biotecnologia
  • Roberto Sartori Departamento de Zootecnia, ESALQ

DOI:

https://doi.org/10.5216/cab.v10i4.3878

Keywords:

Animal reproduction

Abstract

This study investigated the effect of high dry matter intake (Flushing) on the superovulatory response of crossbred Nelore x Simmental cows. Fourteen non-lactating cows, with a mean body condition score (BCS) of 4.0 (scale from 1 to 5) were randomly assigned into two groups (Maintenance=M or Flushing=F). Seven days prior to onset of superovulation (SOV) until the last day of treatment with FSH, group F cows were fed a diet to achieve 180% of maintenance. Group M cows were fed a maintenance diet. Seven days after AI, embryos were collected and evaluated. Forty days later, the treatment groups were inverted and another SOV was realized. Variables were compared by paired t test and data are presented as mean ± SEM. The number of recruited (19.6±1.8 and 16.4±2.0) and ovulated (15.0±1.6 and 13.0±1.6) follicles detected by ultrasonography did not differ between the M and F groups, respectively (P>0.10). However, the total number of embryos/ova (14.1±2.3 and 9.5±1.5) and the number of viable embryos (10.1±2.1 and 6.7±1.5) recovered were greater in group M (P<0.05). Under the conditions of this study, we conclude that nutritional flushing previously to SOV may compromise embryo production in cows with high BCS.
KEY WORDS: Bovine, embryo, nutrition, superovulation.

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Author Biography

Roberto Sartori, Departamento de Zootecnia, ESALQ

Embrapa Recursos Genéticos e Biotecnologia, 70770-900, Brasília-DF, Brasil.

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Published

2009-12-17

How to Cite

BASTOS, M. R.; RAMOS, A. F.; DRIESSEN, K.; MARTINS, A. C.; RUMPF, R.; SARTORI, R. INFLUENCE OF HIGH DRY MATTER INTAKE ON THE SUPEROVULATORY RESPONSE OF CROSSBRED COWS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 4, p. 1066–1073, 2009. DOI: 10.5216/cab.v10i4.3878. Disponível em: https://revistas.ufg.br/vet/article/view/3878. Acesso em: 13 nov. 2024.

Issue

Vol. 10 No. 4 (2009)

Section

Animal Production

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