J. Anim Sci.
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J. Anim Sci. 1983. 56:96-100.
© 1983 American Society of Animal Science
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Nitrogen Metabolism of Gravid and Nongravid Female Swine Fed Every Third Day1

Jose A. Cuaron2, Richard P. Chappie and Robert A. Easter3

University of Illinois at Urbana-Champaign, Urbana 61801

3 Reprint requests should be addressed to this author at Dept. of Anim. Sci., 1301 W. Gregory Drive, Urbana, IL 61801.

Abstract

Crossbred gilts were adapted for 40 d to a 12% crude protein corn-soybean meal gestation diet fed either as a single 1.9-kg meal every day (ED) or as an accumulated 5.7 kg meal every third day (E3D). In the first experiment the effect of meal frequency on N balance was evaluated using eight gravid gilts in a 12-d balance trial. Average N retention was greater (P<.08) for gilts fed ED (15.32 g/d) than for those fed E3D (12.64 g/d). Daily urinary N excretion showed a quadratic effect (P<.01) with the greatest N output occurring during the second 24-h period after the meal for gilts fed E3D. The effect of physiological state on the N metabolism response to E3D feeding was measured in a second experiment using four nongravid and four gravid gilts in a 12-d N balance experiment. Average daily N retention was greater (P<.04) for gravid gilts fed E3D (15.04 g) than for nongravid gilts fed E3D (11.82 g). Digestibility of N and energy was not affected (P>.10) by feeding regimen.

Footnotes

1 The assistance of Scott Williamson, Howard Cook, Steve Heffernan and Dale Alexander with diet preparation and animal care is gratefully acknowledged.

2 Supported by a Fellowship from Consejo Nacional de Ciencia y Tecnologia, Mexico, D.F.






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Copyright © 1983 by the American Society of Animal Science.