The study investigated the effect of Grain Prep Processing Aid (GP) and hot ﬂake aging time on starch characteristics and ruminal DM and starch degradability of steam-ﬂaked corn grain. The moisture content of corn was automatically adjusted using the Grain Prep Auto Delivery System® to 19.8% (Experiment 1) and 18.5% (Experiment 2). Control corn was treated with water alone.
In Experiment 1, compared with the control, GP increased the soluble fraction and effective degradability (ED) of dry matter by 17.2% and 8.6%, respectively. In Experiment 2, the concentration of soluble DM and starch were increased by GP by 15% and 24% compared with the control.