Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)


Previous results obtained from a study of the ability of swine to grow and reproduce on a high acid ration are discussed in relation to the work of others. The significance of a similar test of the ability of swine to ingest and excrete large quantities of alkali during the growing period is stated, and the results are reported of an experiment in which sulfuric acid, sodium hydroxide, sodium carbonate and sodium sulfate were fed these materials were added to a basal ration of corn, tankage, and wheat middlings. The acid-fed lot remained in very thrifty condition and made economical gains until the daily intake was increased well above 500 cc. normal solution. Judging by their performance and appetite during Periods 5 and 7 the lot receiving sodium hydroxide was able to excrete up to about 750 cc. normal solution per animal per day taken with the feed without apparent ill effect, and the carbonate and sulfate were well tolerated up to a level of 1000 cc. per animal per day. There were no marked effects on the average rate of gain of any of the lots except when over 500 cc. were fed. There were no effects on the skeleton or other tissues of the acid-fed hog, which was slaughtered at the close of the experiment, which could with certainty be ascribed to the ration fed .



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