A Comparison of Opaque-2 and Normal Corn in a Free-Choice Feeding System for Swine

Several experiments conducted during the past few years have shown opaque-2 corn to be of higher protein quality than regular or normal corn. The improved quality can be attributed to the higher content of lysine and perhaps tryptophan. Two previous experiments have been conducted at this experiment station which have shown that growing pigs consume less protein supplement on a free-choice basis when opaque-2 corn is the grain rather than normal corn. The experiment reported herein was conducted to obtain further information on feed consumption and performance of growing-finishing pigs fed opaque-2 or normal corn free-choice with two different protein supplements