A finishing phase study was conducted to measure the impact of the fat content of ethanol byproducts on the relative Net Energy values for these feedstuffs. The three feedstuffs with varying crude fat content used included a commercially available corn gluten feed corn distillers grains blend (CGD); a corn wet distillers grains without solubles (WDG); and corn wet distillers grains plus solubles (WDGS). Byproducts were incorporated as 40% of the finishing diets (DM basis) replacing corn and SBM components of the control (CO) diet. There were 6 pens of 7 or 8 yearling steers on each treatment during the 130 d experiment. The assayed average dietary fat content for the CO, CGD, WDG, and WDGS diets were 2.91%, 4.95%, 5.34% and 6.58%, respectively. Increasing fat content of diets (and byproducts) was associated with increased dietary NE content. Diet NEG values derived from steer performance were 60.6, 59.7, 62.0 and 64.6 Mcal/cwt for CO, CGD, WDG and WDGS, respectively. Assuming that the substituted grain had a NEG value of 68 Mcal/cwt, the derived NEG values for the three byproducts were 65.8, 71.5 and 78.1 Mcal/cwt for the CGD, WDG and WDGS diets, respectively. Regression of diet fat content against NEG content indicated that fat represented 2.02 times the NE content of non-fat diet components (P < .02; r2 = 0.26).
Number of Pages
South Dakota State University
Copyright © 2012 South Dakota State University.
Pritchard, R.; Loe, E.; and Milton, T., "Relationship Between Fat Content and NE values
for Some Ethanol Byproducts" (2012). South Dakota Beef Report, 2012. 6.