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Net Energy Evaluation of Cattle Finishing Rations Containing Varying Proportions of Corn Grain and Corn Silage¹

Ohio Agricultural Research and Development Center, Wooster, 44691

Abstract

Three experiments involving 280 steers are summarized where net energy (NE) values of the ration were determined. Varying proportions of corn grain and corn silage were fed in all three experiments; corn grain was fed as dry whole, dry rolled or high moisture (26% moisture) rolled grain. Significant linear decreases in the NE_m and NE_g value of the ration were observed when corn silage was substituted for corn grain; thus the final NE value of the ration was an additive function of the ingredients used. The NE_m and NE_g values for corn silage were determined to be 1.62 and 1.09 kcal/g DM, respectively. The NE value of the ration was not significantly affected by the form of corn grain, although high moisture corn grain resulted in somewhat higher NE_g values. There was a small but significant difference in the NE value of the rations between the three treatments, expecially in their NE_g value.

¹ Approved for publication as Journal Article No. 96–74 of the Ohio Agricultural Research and Development Center, Wooster.