Fontes alternativas proteica e energética em dietas para ovinos e búfalos

Abstract

The objective of this work was to evaluate the ingestive behavior of lambs confined with diets with different sources of energy and protein. Thirty-two Santa Inês ½ Dorper male lambs, with initial live weight 18.52 ± 3.24 kg, distributed in a completely randomized design in a 2x2 factorial scheme, consisting of two energy sources (ground corn and crude glycerin) and two protein sources (soybean meal and cottonseed meal) in the concentrate used. There was no interaction effect of energy source and protein on the studied variables. The intake of DM and NDF min / day and g / feeding period had a significant effect for energy sources studied (P <0.05), with higher consumption observed when the animals were fed corn compared to glycerin. In contrast, feeding times (min / 100 g MS and min / 100 g FDN), rumination (min / day, min / 100 g MS and min / 100 g NDF), chewing (min / 100 g MS and min / 100 g NDF) and idleness (min / day) were higher in glycerin fed animals (P <0.05). In relation to feeding efficiency and rumination glycerinated diets reduced the efficiency (P <0.05). Regarding protein sources, only the time of chewing by ruminal cake showed significant difference (P <0.05) with more time spent when the animals were fed cotton cake. Substituting corn for glycerin reduces feed and rumination efficiency.