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Nutritional Deficiencies of a Concentrate Mixture Composed of Corn, Tankage, Soybean Oilmeal, and Alfalfa Meal for Growing Pigs¹

Pennsylvania Agricultural Experiment Station

Abstract

The addition of manganese to rations which were high in ash and low in manganese content was found to be of benefit in preventing stiffness with pigs of initial weights of 80 to 100 pounds which were gaining weight rapidly. No other deficiencies were evident with normal healthy pigs of these initial weights.

For young pigs with initial weights ranging between 20 and 35 pounds at the beginning of the experiment, rations comprised of yellow corn, tankage, alfalfa, and salt were deficient in growth factors. The factors lacking are apparently supplied by liver and a combination of soybean oilmeal, yeast, and carotene. These factors are not supplied by yeast alone or pure B vitamins.

Nutritional factors required to prevent a mild dermatitis and ataxia were not fully supplied by any of these supplements.

¹ Authorized for publication on November 25, 1941, as paper No. 1064 in the Journal Series of the Pennsylvania Agricultural Experiment Station, State College, Pennsylvania.