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  • Title: Abomasal displacement in cattle: influence of concentrates in the ration on fatty acid concentrations in ruminal, abomasal, and duodenal contents.
    Author: Breukink HJ, de Ruyter T.
    Journal: Am J Vet Res; 1976 Oct; 37(10):1181-4. PubMed ID: 984544.
    Abstract:
    The primary causative factor in abomasal displacement appears to be atony or hypotony of the abomasum. Seemingly, high-concentrate feeding inhibits abomasal motility by increasing the amount of fatty acids which enter the abomasum. In the present study, cows with ruminal, abomasal, and duodenal fistulas were fed a hay ad libitum ration or a hay and concentration ration and were compared. It was shown that a considerable increase in ruminal volatile free fatty acid (VFFA) concentrations was not followed by a subsequent increase in abomasal VFFA concentrations. Differences in abomasal VFFA levels between the 2 rations could not be found. There was a slight, but insignificant, increase in duodenal VFFA concentrations after cows were fed the hay ration. One cow given the hay and concentrate diet had a small, but significant, increase in duodenal VFFA concentrations during the first 2 hours after feeding. The VFFA concentrations in duodenal fluid were too low to support the hypothesis that changes in duodenal VFFA concentrations could be responsible for abomasal hypotony.
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