J. Anim Sci.
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J. Anim Sci. 1979. 48:1394-1400.
© 1979 American Society of Animal Science
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Performance of Pigs on Diets Containing Heated or Unheated Corn with or without Aflatoxin

O. M. Hale1 and D. M. Wilson1 ,2,

University of Georgia College of Agriculture Coastal Plain Station, Tifton 31794

Abstract

Forty-eight pigs (average 18.3 kg live weight) were used in a replicated 2 x 2 factorial experiment to study effects of corn heated (160 to 180 C exit temperature) and unheated with aflatoxin (383 ppb) and without detectable amounts of aflatoxin on performance of growing-finishing pigs. Heating aflatoxin-contaminated corn reduced total aflatoxins from a mean of 383 ppb to a mean of 60 ppb and lysine and methioriine contents by 30 and 21%, respectively, while heating aflatoxin-free corn reduced lysine and methionine contents by 21 and 36%, respectively. Average daily gains of pigs fed diets containing aflatoxin-contaminated corn and those fed diets with aflatoxin-free corn were similar (P>.05). Pigs fed diets with aflatoxin-contaminated corn consumed more feed (P<.05) and required more feed (P<.05) per unit of weight gain. Twelve barrow pigs (average 12.9 kg live weight) were used in a digestion and nitrogen balance trial consisting of three 4 x 4 Latin squares so that each pig received each treatment during the trial. Pigs fed diets containing aflatoxin-free corn had higher digestion coefficients for dry matter, ether extract and nitrogen, consumed less nitrogen, excreted less nitrogen in feces and urine and had a higher nitrogen balance (P<.05) than did pigs fed diets with aflatoxin-contaminated corn. Pigs fed diets with unheated corn had higher digestion coefficients for crude fiber and nitrogen, consumed less nitrogen, excreted less nitrogen in feces and urine and had a higher nitrogen balance (P<.05) than pigs fed diets with heated corn.

Footnotes

1 Department of Animal Science and Plant Pathology, Respectively.

2 The authors thank Mr. Gayle Breymeyer for providing and operating the continuous gas fired roaster.






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Copyright © 1979 by the American Society of Animal Science.