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Nutrient Density and Mycotoxin Contamination in Corn Screenings of Different Bushel Weights

Poultry Science Department, Auburn University, AL 36849

P. L. Mask

Agronomy and Soils Department, Auburn University, AL 36849

R. A. Shelby

USDA, ARS, Aquatic Animal Health Research Lab, Auburn, AL 36831

A. F. Giesen

Novus International, St. Louis, MO 63141

N. M. Dale

Department of Poultry Science, University of Georgia, Athens, GA 30602

Correspondence: J. B. Hess

This study examined nutrient levels and mycotoxins in corn screening (CS) samples of three bushel weight (BWT) ranges. Cs samples were grouped into BWT categories defined as light (35-40 lb/bu), medium (40-45 lb/bu), or heavy (45+ lb/bu). Proximate analyses were determined for each 23 samples as were levels of aflatoxins, T-2 toxin, fumonisin, and zearalenone measured by ELISA analysis. TME analyses were completed on three samples from each of the light and heavy BWT groups. There were differences between BWT groups in protein, fat, fiber, and ash (P<. 10), although nutrient changes did not follow a clear linear trend. Ash content appeared to increase with BWT. TME levels were 96 kcal/kg lower in light BWT (3240 kcal/kg) than heavy BWT (3366 kcal/kg) CS samples. No differences in mycotoxin levels were seen betwee4n BWT groups. Fumonisin was detected in 74% of samples at levels from 1 to 3 ppm. CS TME and ash content were related to BWT, whereas relationships to other nutrients were less clear.

Key Words: Bushel weight • corn screenings • mycotoxins • nutrient levels • TME