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Studies With Corn-Soya Laying Diets

1960; Elsevier BV; Volume: 39; Issue: 6 Linguagem: Inglês

10.3382/ps.0391346

1525-3171

D.J. Bray, J.D. Garlich,

Animal Nutrition and Physiology

IN MANY areas, economics dictate that corn and soybean oil meal serve as the major sources of amino acids in laying rations. Corn-soya diets calculated to contain 11 percent protein have been shown by Thornton et al. (1957) to sustain satisfactory egg production despite the relatively high energy content of such diets. This protein level is considerably below that recommended by the National Research Council (1954). To date, no experiment has been conducted with corn-soya laying diets in which the level of protein was low enough to measure sizeable responses from supplemental amino acids. In the studies to be reported, the performance of laying pullets fed a ration containing 9 percent protein, in which corn and soybean oil meal were the only sources of protein, was compared with the performance of pullets receiving the same diet supplemented with the amino acids needed to meet the minimal levels suggested by Johnson …