J. Anim Sci.
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J. Anim Sci. 1972. 34:653-659.
© 1972 American Society of Animal Science
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Organic Acid, Hydrogen Ion Concentration and Buffering Capacity of Rumen Content from Bloated and Nonbloated Steers Given Different Medicants1

H. W. Essig, C. E. Rogillio2, Fay Hagan and W. J. Drapala

Mississippi State University, State College 39762

Abstract

VFA concentrations were determined for rumen samples taken before grazing and after grazing Ladino clover. Differences (change) in the before grazing and after grazing rumen content VFA concentration was determined. Using this method of VFA concentration change bloaters had significantly greater change (gain) in VFA concentrations above the nonfed sampling time than did the nonbloaters. Bloaters appear to have higher ruminal VFA levels than nonbloaters following the afternoon grazing period. Nonbloaters appear to have a higher concentration of VFA in the rumen than bloaters before the morning grazing period. Rumen pH and VFA concentration of animals before grazing could be indicative of bloat susceptibility. Administration of poloxalene and penicillin appeared to decrease ruminal VFA gains for bloaters and nonbloaters when compared to those of untreated animals. There was evidence that buffering capacity was not directly associated with pH, VFA concentration, or bloating classification. Both poloxalene and penicillin were effective in reducing incidence and severity of Ladino clover bloat.

Footnotes

1 Published with the approval of the Director of the Mississippi Agricultural and Forestry Experiment Station as Journal Paper No. 2175.

2 Present address: Scott County Grain Elevator, Sebastapol, Mississippi.




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J. T. Vasconcelos and M. L. Galyean
ASAS Centennial Paper: Contributions in the Journal of Animal Science to understanding cattle metabolic and digestive disorders
J Anim Sci, July 1, 2008; 86(7): 1711 - 1721.
[Abstract] [Full Text] [PDF]


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