Use of whole soy lecithin in diets with energy concentrate from starchy or lipid sources for steers

ABSTRACT Diets with high energy density and additives that enhance use are necessary for finishing feedlot cattle. The objective of the present study was to evaluate performance, ingestive behavior, apparent digestibility diet carcass traits steers fed concentrates from different sources, one derived starchy sources other, lipid combined or not whole soy lecithin, at a dose 40 g animal day-1. experimental design completely randomized blocks, in 2 x factorial arrangement. combination lecithin source concentrate increased dry matter yield animals (76.03% 57.20%, respectively). showed higher ether extract on it had (84.18% 56.85%, Whole promoted reduction fecal pH due greater fermentation carbohydrates fatty acids intestinal lumen. Using is recommended its improvements yield.