Animal Science Department


First Advisor

James MacDonald

Second Advisor

Galen Erickson

Third Advisor

Mary Drewnoski

Date of this Version



Brinton, M. M. 2019. Evaluation of Alpha Amylase Containing Corn on Beef Cattle Performance and Digestibility and Double-Cropped Annual Forages Following Corn Harvest. M.S. Thesis. Univ. of Nebraska, Lincoln.


A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Animal Science, Under the Supervision of Professor James C. MacDonald. Lincoln, Nebraska: August, 2019

Copyright 2019 McKenna M. Brinton


One digestion and three feedlot trials evaluated the effect of a new corn hybrid containing an α-amylase enzyme trait, Syngenta Enogen Feed Corn (SYT-EFC) on site and extent of digestion, ruminal fermentation parameters, and feedlot performance. Experiments utilized corn containing the enzymatic gene (SYT-EFC) compared to commercially available corn (CON), processed as corn silage (CS) kernel processed or not (KP), dry-rolled corn (DRC), high-moisture corn (HMC), or a blend of DRC and HMC. Growing calves fed high inclusions of CS, displayed increased G:F when CS was KP, resulting in a 6.5% improvement in G:F. Hybrid and kernel processing did not impact digestibility of the corn silages. Finishing cattle fed SYT-EFC as DRC, HMC, or a blend saw no significant improvement in performance or carcass characteristics when compared to CON treatments. Cattle fed DRC based finishing diets with wet distillers grains plus solubles (WDGS) increasing at 0%, 15%, 30%, or 45% had increased G:F when fed SYT-EFC. Inclusion of SYT-EFC and 0% WDGS resulted in a 4.3% increase in G:F compared to the CON treatment. Overall, feeding SYT-EFC corn hybrids would suggest limited improvements in feed efficiency in specific diets.

Advisor: James C. MacDonald