Animal Husbandry Department
pigs, swine, trace mineralized salt, wahlstrom
The USE of trace-mineralized salt in animal feeding has increased during recent years. Experimental work at several experiment stations has shown that the addition of the trace minerals, manganese, cobalt, iron, copper and iodine, to a ration will often improve growth and feed efficiency in swine. In these experiments trace minerals have been added directly to the mixed ration and have not shown the value of a trace-mineralized salt when included in a mineral mixture fed free choice. Although trace minerals may not always be needed, the simplest manner of adding them to a ration is to self-feed a mineral supplement containing trace-mineralized salt, as was clone in the trials reported here. The mineral content of pastures and feed crops depends on the mineral content of the soil and may be influenced by the variety of the crop. The effects of continuous cropping, soil erosion, development of new crop varieties, increase in the use of fertilizers and newer knowledge of the interrelationships between nutrients will have an influence on the amount of mineral supplement need by farm animals. Therefore, it seemed wise to investigate the value of a trace-mineralized salt in a mineral supplement fed free choice to growing-fattening pigs.
South Dakota State State College of Agriculture and Mechanic Arts, Agricultural Experiment Station
Wahlstrom, R. C. and Wilson, R. F., "Feeding Pigs Trace Mineralized Salt" (1954). Agricultural Experiment Station Circulars. 105.