Studies on renal excretion of potassium in the dik-dik antelope

Rugangazi, B.M; Maloiy, G. M. O.

doi:10.1016/0300-9629(88)91016-x

Cited by 9 publications

(1 citation statement)

References 14 publications

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“…Suttle & Field (1967) have shown that fed sheep supplemented with 27 g K given as KCl or potassium acetate increased the urinary Na excretion. A similar increase in the urinary Na excretion due to intrarumen KC1 loading has been observed in fed dik-dik antelopes (Rhynchotragus kirkii) (Rugangazi & Maloiy, 1988). This could be explained by the fact that intrarumen K supplementation stimulates absorption of Na from the rumen (Scott, 1967;' Martens & Hammer, 1981), and the enhanced absorption in turn increases the renal Na excretion.…”

Section: Discussionmentioning

confidence: 56%

Plasma electrolyte concentration in food-deprived goats orally supplemented with potassium chloride

Holtenius

1990

Br J Nutr

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The aim of the present study was to investigate whether oral potassium supplementation during food deprivation could stimulate rumen electrolyte absorption and maintain plasma electrolyte concentration. Eight goats were subjected to food deprivation in combination with intrarumen loads of potassium chloride or, as a control, mannitol in a change-over design. In addition, four KCl-and four mannitoltreated goats were given an extra KCl load towards the end of the experiment. Food-deprived goats which were given KCI maintained their plasma concentration of Na and C1, while plasma K concentration increased from 3.6 mM to 4.4 mM. In control goats receiving mannitol during food deprivation, the plasma concentration (mM) decreased from 144 to 140 for Na, 105 to 100 for C1 and from 3.8 to 3.6 for K, but concentrations were restored when these goats were given a load of KCI. The plasma renin activity was suppressed in food-deprived goats receiving KCI, while those given mannitol showed increased activity. It is suggested that the hyponatraemia which occurs in food-deprived ruminants is mainly caused by diminished K intake.Electrolytes : Potassium chloride supplementation : Goat Ruminants normally ingest large quantities of potassium with the food, while the sodium intake is smaller. During feeding and rumination, large volumes of saliva containing substantial amounts of Na and K enter the rumen (McDougall, 1948). Re-absorption of Na is necessary in order to maintain the plasma Na concentration and Dobson (1959) estimated that about 50 % of the Na in saliva is re-absorbed from the rumen of sheep. It is a matter of controversy whether the rumen fluid concentration of K influences Na absorption. In vivo studies indicate that a high rumen concentration of K stimulates the absorption of Na from rumen to blood (

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Section: Discussionmentioning

confidence: 56%