QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Schonewille, J. Th. Articles by Ram, L. Search for Related Content PubMed PubMed Citation Articles by Schonewille, J. Th. Articles by Ram, L.

---

Article

Dietary Potassium Bicarbonate and Potassium Citrate Have a Greater Inhibitory Effect than Does Potassium Chloride on Magnesium Absorption in Wethers

Department of Nutrition, Faculty of Veterinary Medicine, Utrecht University, 3508 TD Utrecht, The Netherlands

²To whom correspondence and reprint requests should be addressed.

We addressed the question whether the type of anion in potassium salts affects magnesium absorption and the transmural potential difference by using wethers (n = 8) fed a control diet and diets supplemented with equimolar amounts of KHCO₃, KCl or K-citrate according to a Latin-square design. The control diet contained 10.9 g K/kg dry matter and the high K diets contained 41.3 g K/kg dry matter. Compared with the control diet, KHCO₃ and K-citrate significantly reduced apparent Mg absorption by 9.5 and 6.5%, respectively. Supplemental KCl tended to reduce (P = 0.070) group mean magnesium absorption by 5.5%. Consumption of supplemental KHCO₃ and K-citrate produced a significant increase in the transmural potential difference (serosal side = positive) by 17.1 and 20.7 mV, respectively, whereas the addition of KCl to the diet did not. The individual values for the four diets tended to show a negative correlation (r = -0.336, n = 32, P = 0.060) between the transmural potential difference and apparent magnesium absorption. We conclude that different potassium salts have different effects on magnesium absorption in ruminants as caused by different effects on the transmural potential difference.

KEY WORDS: • magnesium absorption • wethers • potassium • potential difference

This article has been cited by other articles:

				D. A. van Doorn, H. Everts, H. Wouterse, and A. C. Beynen The apparent digestibility of phytate phosphorus and the influence of supplemental phytase in horses J Anim Sci, June 1, 2004; 82(6): 1756 - 1763. [Abstract] [Full Text] [PDF]

				S. Jittakhot, J. T. Schonewille, H. Wouterse, C. Yuangklang, and A. C. Beynen Apparent Magnesium Absorption in Dry Cows Fed at 3 Levels of Potassium and 2 Levels of Magnesium Intake J Dairy Sci, February 1, 2004; 87(2): 379 - 385. [Abstract] [Full Text] [PDF]

				M. Schweigel and H. Martens Anion-dependent Mg2+ influx and a role for a vacuolar H+-ATPase in sheep ruminal epithelial cells Am J Physiol Gastrointest Liver Physiol, June 9, 2003; 285(1): G45 - G53. [Abstract] [Full Text] [PDF]