Effects of XXXX concentration in steam-flaked @entity4336 -based diets with supplemental yellow grease on performance and carcass characteristics of finishing beef steers.

@entity3918 @entity4336 @entity4022 @entity653
Forty-eight individually fed crossbred steers (initial BW = 381    7.61 kg) were used to determine the effects of @entity653 ( @entity4022 ) concentration in steam-flaked @entity4336 (SFC)-based diets with added yellow grease on animal performance and carcass characteristics. @entity653 was included at 0, 2.5, 5, and 10% dietary @entity3918 replacing SFC. A completely randomized design was used with steers as the experimental unit, and the model included the fixed effects of diet. Contrast statements were used to determine linear and quadratic effects of @entity4022 inclusion. Final BW and DMI were not affected ( > 0.27) by @entity4022 concentration. Average daily gain and G:F based on live BW did not differ as @entity4022 level increased in the diet from 0 to 10% of @entity3918 ( > 0.33). Carcass-adjusted final BW and carcass-adjusted G:F were also not affected by @entity4022 concentration ( > 0.22); however, carcass-adjusted ADG tended to respond quadratically by decreasing from 2.5 to 5% @entity4022 inclusion and increasing thereafter ( = 0.10). Calculated dietary NE and NE did not differ as @entity4022 increased in the diet ( > 0.37). Hot carcass weight tended to respond quadratically, decreasing from 2.5 to 5% @entity4022 and increasing thereafter ( = 0.10). Likewise, dressing percentage tended to respond quadratically by decreasing from 2.5 to 5% @entity4022 inclusion and increasing to 10% @entity4022 inclusion ( = 0.09). Fat thickness decreased linearly as @entity4022 inclusion increased in the diet ( < 0.01); however, no differences were detected in marbling score and LM area ( > 0.21). Calculated yield grade (YG) decreased linearly as @entity4022 increased in the diet from 0 to 10% of @entity3918 ( = 0.04). Based on our results, there was no animal performance benefit for replacing SFC with @entity4022 in diets containing yellow grease, and the only change in carcass merit was a slight improvement in YG.
