NDSU Beef Feedlot - NDSU Agriculture - North Dakota State ...

Feed-grade glycerol added to totally-mixed ration in a
truck-mounted mixer wagon.
Materials and Methods
Animals were housed at the Carrington Research Extension Center. Individual animals were weighed,
blocked by weight and randomly allotted within block to one of four ration treatments. There were four
pens or replicates for each treatment utilizing 16 pens. The four treatments included glycerol in the
ration at 0, 6, 12, or 18 percent of the diet DM. The diets (Table 1) were fed as a totally-mixed ration
that included wheat middlings, distillers grains, field peas, and decreasing levels of corn (60, 40, 20,
and 0%, respectively). Animals were fed once daily to appetite based on morning bunk readings, with
feed recorded daily and summarized for each weigh period. The average daily DMI, gain, and feed
efficiency were calculated for each pen for each weigh period (~ 28 d). The glycerol for this study was
donated to the CREC by Westway Feeds Products, Inc. of New Orleans, LA, and FUMPA BioFuels of
Redwood Falls, MN.
Receiving Ration Finishing Ration
Item DM% Percent of diet DM basis Percent of diet DM basis
Glycerol, % 85.1 0 6 12 18 0 6 12 18
Corn, % 86.6 43 37 31 25 60 40 20 10
Field Peas, % 90.7 15 15 15 15 12 12 12 12
Wheat Midds, % 88.9 5 5 5 5 5 13 21 29
MDGS, % b
Table 1. Receiving and Finishing ration formulation with increasing levels of glycerol
57.5 20 20 20 20 12 18 24 30
Straw, % 85.2 15 15 15 15 8 8 8 8
Rumn & MGA, % 90.0 1 1 1 1 2 2 2 2
CaCO3, % 95.0 1 1 1 1 1 1 1 1
a .
a Rations formulated to meet or exceed NRC (1996) recommendations
b Modified distillers grains with solubles.
Page 25 2009 NDSU Beef Feedlot Research Report