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Journal of Animal Science, Vol 71, Issue 8 2157-2163, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

Effects of high-copper feeding on portal ammonia absorption and on oxygen consumption by portal vein-drained organs and by the whole animal in growing pigs

J. T. Yen and J. A. Nienaber
R. L. Hruska U.S. Meat Animal Research Center, USDA, Clay Center, NE 68933-0166.

Growing gilts that had catheters inserted into the portal vein, ileal vein, and carotid artery and that were trained to consume 1.2 kg of a 16% CP corn-soybean meal basal diet once daily were used. In Trial 1, hourly simultaneous measurements of the O2 consumption by portal vein-drained organs (PVDO) and by the whole animal during the 24- to 30-h postprandial period were conducted in eight pigs (33.8 +/- .6 kg). After initial measurements, four pigs continued to receive the basal diet and four pigs were fed a basal diet +250 ppm of Cu. Following a 7-d acclimation period, the second series of measurements were made. In pigs fed the diet supplemented with Cu, the PVDO and whole-animal O2 consumptions and the fraction of whole-animal O2 consumption used by PVDO were not different (P > .05) between the initial and second series. In Trial 2, seven gilts (38.5 +/- .9 kg) were used for measurements of net portal NH3 absorption and the O2 consumption by PVDO and by the whole animal during the 0- to 6-h postprandial period. The second series of measurements were made 7 d after four pigs were fed the diet supplemented with Cu. For pigs fed the diet supplemented with Cu, during the second series of measurements, the net portal NH3 absorption was lowered (P < .05). No differences (P > .05) in PVDO and whole-animal O2 consumptions and the fraction of whole-animal O2 consumption used by PVDO were found between the initial and second series.(ABSTRACT TRUNCATED AT 250 WORDS)


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J. T. Yen, V. H. Varel, and J. A. Nienaber
Metabolic and microbial responses in western crossbred and Meishan growing pigs fed a high-fiber diet
J Anim Sci, June 1, 2004; 82(6): 1740 - 1755.
[Abstract] [Full Text] [PDF]


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Copyright © 1993 by the American Society of Animal Science.