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Response of Early-Weaned Pigs to Variations in Dietary Calcium Level with and without Lactose¹

Cornell University⁴, Ithaca, New York

Abstract

Two trials were conducted with 76 baby pigs to observe the response to graded levels of calcium and to study the effect of lactose on this response. Using a semi-purified diet, phosphorus level was maintained at 0.45% or 0.7% and calcium level varied from 0.11 to 0.7%. A dietary level of 0.45% Ca and 0.45% P appeared inadequate based on average daily gain, feed efficiency and bone ash determinations. There was no significant effect of diet on serum inorganic phosphorus level or on P as a percent of femur ash. Under conditions of these experiments lactose, when compared to glucose, showed no beneficial effect on performance of pigs weaned at 2 to 3 weeks of age.

¹ The technical assistance of F. Lovelace, R. Whipple, C. Perez, G. Kroening and S. Spitz in conducting this study is gratefully acknowledged. We wish to thank Foremost Dairies, Inc., for the generous supply of lactose used in these studies.

² Present address: Department of Dairy Science, University of Wisconsin, Madison, Wisconsin.

³ Present address: Department of Animal Husbandry, University of Missouri, Columbia, Missouri.

⁴ Department of Animal Husbandry.