Resumen

CARVALHO, S. et al. Ingestive behavior of lambs Texel and Ideal fed soybean hulls. Arch. zootec. [online]. 2014, vol.63, n.241, pp.55-64. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922014000100006.

This experiment was conducted in the laboratory of sheep-raising of the Federal University of Santa Maria aiming to evaluate the ingestive behavior of sheep breeds Texel and Ideal, finished in feedlot with diets containing different levels of soybean hulls in place of sorghum silage. Forty male uncastrated lambs were used, 20 from the Texel breed and 20 from Ideal breed, weaned approximately at 50 days and housed in individual pens were randomly divided into four groups according to the level of inclusion of soybean hulls in the diet: 0 %, 33.5 %, 66.5 % and 100 % of soybean hulls in replacement of sorghum silage. The time spent in feed activities, chewing time and the total time spent per meal decreased linearly, while the period of idleness and feeding efficiency of rumination increased linearly with increasing level of sorghum silage substitution by soybean hulls. Texel lambs remained more time on rumination activities and total chewing, spent more time per meal, spent less time in idleness and showed less rumination efficiency when compared with Ideal lambs when confined in the finishing phase.

Palabras clave : Feedlot; Feeding efficiency; Meal; Ruminating.

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