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Journal of Animal Science, Vol 70, Issue 2 478-483, Copyright © 1992 by American Society of Animal Science

JOURNAL ARTICLE

Influence of carbadox on fasting oxygen consumption by portal vein-drained organs and by the whole animal in growing pigs

J. T. Yen and J. A. Nienaber
ARS, Roman L. Hruska U.S. Meat Animal Research Center, U.S. Department of Agriculture, Clay Center, NE 68933.

Fasting O2 consumption by the whole animal (W) and by portal vein-drained organs (PVDO) during the 24- to 30-h postprandial period were measured in seven growing pigs (36.1 +/- 2.3 kg) with catheters chronically placed in the hepatic portal vein, ileal vein, and carotid artery trained to consume 1.2 kg of a 16% CP corn soybean meal basal diet (B) once daily. The pigs were placed individually into an open-circuit, indirect calorimeter and connected to an arteriovenous (A-V) O2 difference analyzer for hourly simultaneous measurements of O2 consumption by W and PVDO. The PVDO O2 consumption was calculated by multiplying the A-V O2 difference by the portal vein blood flow rate derived from constant infusion of a p-aminohippuric acid solution into the ileal vein. After the initial series of hourly measurements, four pigs remained on the B diet and three pigs were fed a B + 55 ppm carbadox diet. Seven days later, the second series of measurements was made. In pigs fed the diet with carbadox added, the hourly W O2 consumptions were not different (P greater than .05) between the initial and second series and averaged 7.5 mL.min-1.kg of BW-1. However, the A-V O2 differences (mL/dL) were reduced (P less than .05) from 4.6 to 4.0 at 24 h, 4.8 to 4.0 at 25 h, and 4.6 to 4.0 at 29 h postprandial and the fractions of W O2 consumption used by PVDO (percentage) were reduced (P less than .05) from 28.6 to 21.6 at 26 h and 25.2 to 18.2 at 27 h postprandial.(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 © 1992 by the American Society of Animal Science.