Influence of genetic group and feeding on performance of lambs in confinement

Authors

  • Nelson Nogueira Barros
  • Vânia Rodrigues de Vasconcelos
  • Marcelo Renato Alves de Araújo
  • Espedito Cezário Martins

DOI:

https://doi.org/10.1590/S1678-3921.pab2003.v38.6679

Keywords:

Leucaena leucocephala, hay, feed intake, feed conversion efficiency, weight gain, sheep

Abstract

The objective of this work was to establish the influence of breeding ram and feeding on performance of lambs in confinement. The experimental design was completely randomized, in a 2x4 factorial arrangement. The treatments were two genetic groups (Santa Inês x not defined breed (NDB) and Somalis x NDB) and concentrate (corn, soybean meal plus mineral salt) at 15%, 30%, 45% and 60%. Thirty two animals were confined in individual stalls and each was one repetition. The diets were composed by concentrate and roughage, leucaena hay (Leucaena leucocephala), as a complete ration. The slaughter weight increased and the feed efficiency improved (P < 0.05) as concentrate in diet was increased. A quadratic effect on dry matter intake and organic matter intake with maximum values of 35.29% and 35.36%, respectively, was observed. All estimated gross margin were positive. There was no difference (P > 0.05) among concentrates; however, the genetic group Somalis x NDB was superior (P < 0.05) to Santa Inês x NDB.

Published

2003-09-01

How to Cite

Barros, N. N., Vasconcelos, V. R. de, Araújo, M. R. A. de, & Martins, E. C. (2003). Influence of genetic group and feeding on performance of lambs in confinement. Pesquisa Agropecuaria Brasileira, 38(9), 1111–1116. https://doi.org/10.1590/S1678-3921.pab2003.v38.6679

Issue

Section

ANIMAL SCIENCE