Effects of anions on Ca absorption across the rumen

Feeding anions has a positive effect on Ca homeostasis in cows. Since some studies suggest a non-acid-base effect of anions, we studied their effects on the microclimate of the rumen surface and on ruminal Ca absorption. Ruminal surface pH was increased by sulphate, as previously shown for chloride. However, while chloride and short-chain fatty acids stimulate ruminal Ca absorption, sulphate had no consistent effect on Ca flux rates. These observations underline that anions also contribute to Ca homeostasis by different gastrointestinal effects.

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Transport of cations and anions across forestomach epithelia: conclusions from in vitro studies
S. Leonhard-Marek, F. Stumpff, H. Martens
animal

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1230-1388

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