Influence of level and method of supplementation on the utilization of supplemental fat by feedlot steers.

摘要: A growth performance trial was conducted to determine the influence of level and method of supplementation on the utilization of supplemental fat (tallow fatty acids) in high-energy diets for feedlot cattle. A total of 216 crossbred steer calves, weighing 276±6.8 kg, were used in this study. Three methods of fat supplementation (fat added directly to the grain, fat added directly to the hay, and fat added as the last step in the batch mixing) were compared at 3 levels of supplementation (3, 6 and 9% fat). Adding fat directly to the grain or as the last step in batch mixing had similar (P>0.10) effects on growth performance. The addition of fat directly to the hay decreased the dry matter intake (DMI) and average daily gain (ADG) at the 3 and 9% levels of fat supplementation (fat level by method of supplementation interaction, P<0.05). Method of fat supplementation did not affect (P>0.10) dietary NE. Increasing the level of fat …