EFFECT OF DIFFERENT SOURCES AND CONCENTRATIONS OF ZINC IN THE MINERAL MIXTURE ON PERFORMANCE AND SEMINAL CHARACTERISTICS OF GRAZING YOUNG BULLS

Authors

  • Alexandra Rocha de Oliveira UFMS
  • Maria da Graça Morais UFMS
  • Sheila da Silva Moraes CNPGC/EMBRAPA
  • Carlos Eurico Fernandes UCDB
  • Luis Carlos Vinhas Ítavo UCDB
  • Urbano Gomes Pinto de Abreu EMBRAPA PANTANAL

DOI:

https://doi.org/10.5216/cab.v8i3.1687

Keywords:

Minerais, Semen de touros

Abstract

Sixteen young Nellore bulls with approximately 26 months of age  maintained o pasture were submitted to four different supplementations of zinc in the mineral mixture: Zn-0 (without zinc); Zn 30FO (30 mg of organic Zn/Kg); Zn 30FI (30 mg of inorganic Zn/Kg) and Zn 60FI (60 mg of inorganic Zn/Kg). Mineral mixture intake was measured and it was verified that the animals of Zn-0 had higher mi-neral mixture intake than the animals of other treatments, differing statistically (P <0,05) of Zn-30FO, Zn-30FI and Zn-60FI and that the animals of Zn-60FI had the lowest intake. Animals were weighted, blood and semen were collected and complete andrological analyses were done. No statistical differences were observed (P>0,05) among treatments for weight gain. Bulls of Zn-0 showed sperma-tozoids with less motility and vigor and higher chances of having spermatozoids with head, middle piece and proximal citoplasmatic drop defects. Animals supplemented with 60 mg of inorganic Zn/Kg showed higher chances of not having head, intermediate piece and proximal citoplasmatic drop defects on spermatozoids. Different sources and concentra-tions of zinc in the mineral mixture of young bulls didn’t affect the performance on experimental conditions, but did in the seminal characteristics.

KEY-WORDS: Growth, spermatozoids, inorganic zinc, organic zinc.

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Published

2007-09-12

How to Cite

OLIVEIRA, A. R. de; MORAIS, M. da G.; MORAES, S. da S.; FERNANDES, C. E.; ÍTAVO, L. C. V.; ABREU, U. G. P. de. EFFECT OF DIFFERENT SOURCES AND CONCENTRATIONS OF ZINC IN THE MINERAL MIXTURE ON PERFORMANCE AND SEMINAL CHARACTERISTICS OF GRAZING YOUNG BULLS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 8, n. 3, p. 465–478, 2007. DOI: 10.5216/cab.v8i3.1687. Disponível em: https://revistas.ufg.br/vet/article/view/1687. Acesso em: 26 jul. 2024.

Issue

Vol. 8 No. 3 (2007)

Section

Animal Production

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