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Effect of Protein Level, Amino Acid Supplementation and Duration of Feeding of A dry Early-Weaning Pig Ration

Macdonald College, (McGill University)^,2, Province of Quebec, Canada

Abstract

The correction of apparent essential amino acid imbalances in two early-weaning rations and in an 18% protein starter ration by the addition of appropriate amounts of methionine and isoleucine did not enhance the biological value of such rations for pigs.

A 20% protein early-weaning ration was not adequate for pigs weaned at 2 weeks of age.

The minimum nutritionally satisfactory age for changing pigs from an early-weaning ration to a conventional 18% protein starter ration was 6 weeks of age, and the recommended level of protein in the early-weaning ration was set at 24%.

¹ The authors are indebted to the Agricultural Research Council, Quebec Department of Agriculture for financial support in this study; and, to Merck and Company for the supply of amino acids and for part financial assistance.

² Department of Animal Science (Nutrition).

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