The Role of Manganese in Growth, Reproduction, and Lactation of Swine

Abstract

A ration of corn, soybean oil meal, gluten meal, and alfalfa, containing about 12 ppm of Mn, was improved for pigs confined on concrete by supplementing additional manganese. However, the performance was not improved when the total manganese content exceeded 55 ppm. Growing hogs did not tolerate a high level of manganese (500 ppm). The specific manganese requirement of growing pigs is still an unknown quantity. Costly synthetic diets will perhaps be necessary for such a determination. Copyright © . .