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The Methionine Requirement for the Growth of Swine

Departments of Animal Husbandry and Biochemistry and Nutrition, Cornell University, Ithaca, New York

Two experiments were conducted to study the methionine requirement of weanling pigs fed a ration containing 22% protein from isolated soybean protein and brewers' dried yeast. From the data obtained, the methionine plus cystine requirement for weanling pigs appears to be approximately 0.7% of the ration containing 22% protein. This corresponds to 3.2% of the protein. Cystine apparently can be used to replace methionine in the ration up to at least 1.7% of the protein.

Manuscript received 31 July 1952.

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