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Response of the Young Pig to Levels of Dietary Potassium

Illinois Agricultural Experiment Station, Urbana

Abstract

Two experiments involving 80 pigs were conducted to study the effect of levels of dietary potassium on pigs weaned directly to dry rations at 14 to 18 days of age. The control rations analyzed 0.027% and 0.004% potassium. Potassium was added as K₂CO₃ in increments of 0.1% and 0.05% in experiments 1 and 2, respectively.

Pigs on the control rations had poor appetite, became emaciated, had rough hair coats, became unsteady on their feet, with death occurring after 6 weeks. Electrocardiograms indicated marked cardiac impairment but autopsy revealed no pathological symptoms directly attributable to the potassium deficiency.

The optimum total level of potassium was estimated to be approximately 0.26%.

² The authors wish to acknowledge Corn Products Co., New York, New York; Merck & Co., Rahway, New Jersey; American Cyanamid Co., Pearl River, New York; Illinois Farm Supply Co., Bloomington, Illinois and Moorman Mfg. Co., Quincy, Illinois for funds and products which made this study possible.

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