VOLUNTARY INTAKE, APPARENT DIGESTIBILITY AND NITROGEN BALANCE IN EWES FED DIETS WITH DIFFERENT NEUTRAL DETERGENT FIBER LEVELS

Authors

  • Gilberto de L. Macedo Junior Universidade Federal do Tocantins
  • Luciano Fernandes de Sousa Universidade Federal do Tocantins
  • Fernanda Nascimento de Godoi Universidade federal de Minas Gerais
  • Juan R. Olalquiaga Perez Universidade Federal de Lavras
  • Patricia Maria de França Universidade Federal de Lavras
  • Thais Romano V. Almeida
  • Oiti José de Paula CEFET BAMBUÍ
  • Roberta de Moura Assis Universidade Federal de Goiás

DOI:

https://doi.org/10.5216/cab.v13i1.9481

Keywords:

Animal Nutrition

Abstract

This research was carried to investigate the effect of different levels of forage neutral detergent fiber (fNDF) in the diet offered to ewe on the intake and apparent digestibility of the diet and on nitrogen balance. Sixteen adult, non-pregnant and non-lactating Santa Ines ewes, weighting 45.01 ± 5.15 kg, were used. The experimental design used was a 4x4 latin square, with four treatments (8.67%; 17.34%; 26.01% and 34.69% of fNDF) four animals and four periods. The intake of dry matter (DM), organic matter (OM), gross energy (GE), digestible energy (DE), metabolizable energy (ME), crude protein (CP), digestible protein (DP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were influenced positively by the levels of fNDF of the treatments. The apparent digestibility of DM, OM, GE and ADF were influenced by treatments. Nitrogen balances were positive at all levels of forage NDF. This study made it clear that there is a physiological limit to the use of concentrate in diets offered to ewe, being necessary a minimum amount of forage NDF in the diet to reach the maximum efficiency of nutrients use; however, this limit seems to be inferior at the lowest level of fNDF of the current study.

KEYWORDS: animal nutrition; metabolism; ruminants.

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Author Biographies

Gilberto de L. Macedo Junior, Universidade Federal do Tocantins

Escola de Medicina veterinária e Zootecnia - EMVZ, Araguaína, TO.

Luciano Fernandes de Sousa, Universidade Federal do Tocantins

Escola de Medicina veterinária e Zootecnia - EMVZ, Araguaína, TO.

Fernanda Nascimento de Godoi, Universidade federal de Minas Gerais

Escola de veterinária, Belo Horizonte, MG

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Published

2012-03-29

How to Cite

MACEDO JUNIOR, G. de L.; DE SOUSA, L. F.; DE GODOI, F. N.; PEREZ, J. R. O.; DE FRANÇA, P. M.; ALMEIDA, T. R. V.; DE PAULA, O. J.; ASSIS, R. de M. VOLUNTARY INTAKE, APPARENT DIGESTIBILITY AND NITROGEN BALANCE IN EWES FED DIETS WITH DIFFERENT NEUTRAL DETERGENT FIBER LEVELS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 13, n. 1, p. 33–40, 2012. DOI: 10.5216/cab.v13i1.9481. Disponível em: https://revistas.ufg.br/vet/article/view/9481. Acesso em: 17 may. 2024.

Issue

Vol. 13 No. 1 (2012)

Section

Animal Production

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