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Studies with Swine on Low-Manganese Rations of Natural Foodstuffs¹

Arkansas Agricultural Experiment Station

Abstract

Pigs have been grown at satisfactory rates from weaning to butcher weights on rations of natural foodstuffs containing 7 to 10 parts per million of manganese. When the ash content of these rations was raised to over 10 per cent there appeared to be a slight beneficial effect from the addition of manganese, though the ratio of medium ash content, which was not supplemented with manganese, appeared to be the most satisfactory of those used.

Reproduction on a ration of corn and skimmilk, with vitamin D supplement, was satisfactory through two generations.

Manganese storage in the liver and body of animals on rations of natural foodstuffs of low manganese content is greater than that previously found for animals on a very low manganese ration of semi-implified type.

¹ Research paper No. 780, Journal Series, University of Arkansas. Published with the approval of the director of the director of the Arkansas Agricultural Experiment Station, Fayetteville, Arkansas.