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Evaluation of Corn Gluten Feed in High-Energy Diets for Sheep and Cattle^1,2,

University of Missouri, Columbia 65211

Abstract

Dry, wet and ensiled corn gluten feed (CGF) in high-energy diets for cattle and sheep were evaluated by an in vitro experiment and three digestion trials. After 6 h of incubation, NH₃-N released by microbial degradation was lowest (P < .01) for dry CGF, intermediate for wet CGF, and highest (P < .01) for soybean meal (SBM). Lambs fed corn+urea, corn+SBM, or up to 50% dry, wet or ensiled CGF in high-concentrate diets had similar (P > .10) DM digestibilities. The CGF diets were intermediate (P < .10) in their N digestibility to corn+urea (lowest) and corn+SBM (highest). Lambs (10 crossbred wethers, 18 kg) had more (P < .10) DM, ADF and protein-N flowing to the abomasum per day when fed CGF than when fed corn+urea and corn+SBM diets. When corn+urea, corn+SBM, dry, wet and ensiled CGF diets were fed to heifers (five calves, 225 kg), no differences (P > .10) were found in abomasal or ileal flow of DM, N, essential (EAA), nonessential (NEAA) or total amino acids, or in amino acid disappearance from the small intestine. The apparent digestibility in the small intestine of individual amino acids ranged from 44.9 to 70.8% for cystine and arginine, respectively. For all the diets, the most limiting amino acid appeared to be histidine; only 47.5% of the estimated requirement was absorbed from the small intestine. These data are interpreted to suggest that CGF either dry, wet or ensiled, can be substituted satisfactorily for up to 50% of the DM in high-concentrate diets for cattle and sheep and compare favorably with corn+urea and corn+SBM diets.

¹ Journal Paper No. 10332 of the Missouri Agric. Exp. Sta.

² Supported in part by the Missouri Res. Assistance Act, Archer Daniels Midland Co., Decatur, IL and Corn Refiners Assoc. Inc., Washington, DC.

³ Dept. of Anim. Sci.

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