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Energy value of de-oiled modified distillers grains plus solubles in beef feedlot diets

Tuesday, March 18, 2014: 10:30 AM
304-305 (Community Choice Credit Union Convention Center)
Meredith L Bremer , University of Nebraska-Lincoln, Lincoln, NE
Brandon L Nuttelman , University of Nebraska-Lincoln, Lincoln, NE
Curtis J. Bittner , University of Nebraska-Lincoln, Lincoln, NE
Dirk B Burken , University of Nebraska-Lincoln, Lincoln, NE
Galen E. Erickson , University of Nebraska-Lincoln, Lincoln, NE
Jim C. MacDonald , University of Nebraska-Lincoln, Lincoln, NE
Terry J. Klopfenstein , University of Nebraska-Lincoln, Lincoln, NE
Recorded Presentation (flv) Audio File
Abstract Text:

A 153-d finishing trial was conducted utilizing 378 calf-fed steers (initial BW = 363 ± 17 kg) to evaluate the effects of feeding modified distillers grains plus solubles (MDGS) at increasing levels in the diet on cattle performance and carcass characteristics.  De-oiled MDGS (7.2% fat) was included in the diet at 0, 15, 30, 45 or 60% on a DM basis.  In addition, 15 or 30% normal (12.0% fat) MDGS from the same plant was also fed and analyzed as a separate 2×2 factorial arrangement of treatments using 15 or 30% inclusion and MDGS being either de-oiled or normal.  The remainder of all diets consisted of 12% corn silage, 5% supplement, and a 1:1 blend of high moisture and dry rolled corn, with corn replaced by MDGS.  Cattle were limit fed for 5 days and weighed on two consecutive days.  Steers were blocked by BW into three blocks (heavy, medium and light) with 9 head per pen. Treatments were assigned randomly to pens and balanced within block.  Steers were implanted with Revalor-XS implants on d 1.  Final BW, DMI, and ADG did not differ significantly when de-oiled MDGS was increased in the diet (P > 0.19).  However, G:F increased linearly as inclusion of de-oiled MDGS increased (P < 0.01).  Hot carcass weight and LM area did not differ significantly between treatments, but 12th-rib fat thickness increased quadratically (P = 0.02) along with marbling (P < 0.01) as de-oiled MDGS was added to the diet. For the 2×2 factorial with 15 or 30% inclusion of each type of MDGS, no MDGS concentration by oil content interaction existed for gain (P = 0.28), but an interaction did exist  for G:F (P = 0.07).  Feeding 30% MDGS increased fat thickness (P < 0.01) when compared to cattle fed 15% MDGS in their diet.  Feeding de-oiled or normal MDGS did not affect G:F(P = 0.48), but at 30% inclusion, steers fed normal MDGS had improved performance compared to  those fed de-oiled MDGS (G:F, P = 0.07).  This study suggests that increasing de-oiled MDGS increases G:F similar to previous work on distillers grains.  The impact of oil removal from MDGS is impacted by dietary inclusion.  At 30% inclusion of MDGS, decreasing the fat content from 12.0% to 7.2% decreased steer performance by 3.4%. 

Keywords: distiller grains plus solubles, feedlot cattle, oil removed

See more of: Ruminant Nutrition:Coproducts
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