Are the effects of dietary lipid content in grazing beef cattle independent of the amount of concentrate supplement?

This study aimed to evaluate the effects of levels concentrate supplement and dietary lipids on nutritional characteristics, metabolic parameters, performance Nellore bulls grazing tropical pasture. Twenty-seven were allotted 2 × completely randomized factorial design with two supplementation lipids. The was fed at 4 g kg-1 BW (low supplementation) 8 (high supplementation), whereas lipid content 28 ether extract (EE) g-1 a dry matter basis (DM) (low-lipid diet) 42 EE DM (high-lipid diet). There no interaction between level all studied variables. High led shorter time reduced forage intake (DMF). On other hand, increased increasing supplement, significant digestibility. did not affect intakes. However, digestibility neutral detergent fiber (NDF) lowest in high-lipid diets. Bulls receiving high had higher average daily gains than low-supplemented animals. Neither amount nor affected hot carcass yield weight. Carcass fat deposition greater diets animals low-lipid characteristics beef cattle are independent. Concentrate increases but decreases utilization. Diets containing reduces fractions, backfat thickness.