J. Anim Sci.
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J. Anim Sci. 1974. 38:417-423.
© 1974 American Society of Animal Science
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Artificially Altered Corn Grain Harvested at Three Moisture Levels. I. Dry Matter and Nitrogen Losses and Changes in the Carbohydrate Fractions1

Michael M. Danley and R. L. Vetter2

Iowa State University, Ames 50010

Abstract

Changes in the carbohydrate fractions of artificially altered corn grain were determined on field corn harvested at 22, 18 and 16% moisture and altered by the following methods: untreated-ensiled, dried reconstituted-ensiled, formic acid reconstituted-ensiled, dried, microwaved and steamed.

Compared with ensiled corn, heat-treated corn had significantly (P<.05) higher dry matter (DM) and total nitrogen (TN) losses. With adequate moisture, fermentation losses were lowest for formic acid reconstituted corn, followed by reconstituted and untreated-ensiled corn grain, respectively. Losses in DM and TN for heat-altered corn decreased with decreasing moisture content at harvest and were lowest for dried corn, followed by steamed and microwaved corn grain, respectively.

Alteration of corn grain had no significant (P <.05) effect on total carbohydrates; however, differences in water soluble carbohydrates (SCHO) and insoluble carbohydrates (ISCHO) due to alteration were significant (P <.05). Compared with ensiling, heat-treated corn had significantly (P <.05) lower SCHO and significantly (P <.05) higher ISCHO. Values for SCHO were significantly (P <.05) lower for reconstituted than for formic acid reconstituted corn and for microwaved compared with steamed corn.

Footnotes

1 Part of a dissertation submitted by the senior author to Iowa State University in partial fulfillment of the requirements for a Ph.D. degree in Animal Science and Agronomy. Journal Paper No. J-7467 of the Iowa Agriculture and Home Economics Experiment Station, Ames. Project No. 1559.

2 Department of Animal Science.






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Copyright © 1974 by the American Society of Animal Science.