J. Anim Sci.
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J. Anim Sci. 1974. 38:424-429.
© 1974 American Society of Animal Science
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Artificially Altered Corn Grain Harvested at Three Mositure Levels. II. Changes in the Nitrogen Fractions1

Michael M. Danley and R. L. Vetter2

Iowa State University, Ames 50010

Abstract

Changes in nitrogen solubility 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.

Total nitrogen (TN) contents of artificially altered corn grain were not significantly (P <.05) affected by method of alteration or initial moisture content.

Water- (WSN), sodium chloride- (SCSN), ethanol- (ESN), sodium hydroxide- (SHSN) and total soluble nitrogen- (TSN) fractions of artificially altered corn grain were determined by successive extractions. Regardless of extraction, significant (P <.05) differences in nitrogen solubility occurred with decreasing moisture content at harvest. The WSN and SCSN fractions were affected to a greater extent by method of alteration. Values for TSN were lowest for microwaved corn, followed by dried, steamed, untreated, ensiled, reconstituted and formic acid reconstituted corn, respectively. Associated with increased TSN was a corresponding decrease in insoluble nitrogen. For the most part, significant (P <.05) differences in nitrogen solubility occurred between reconstituted and formic acid reconstituted corn and between microwaved and 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-7468 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 1559.

2 Department of Animal Science.






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Copyright © 1974 by the American Society of Animal Science.