Anti-rachitic Effects of Soybean Preparations for Turkey Poults

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Abstract
Broad Breasted Bronze turkey poults fed to 4 weeks of age a glucose-isolated soybean protein diet, supposedly adequate in all known nutrients, developed severe rickets and grew poorly. Heated soybean meal, raw soybean meal, or water extracts of raw or heated soybean meal partially prevented the rickets and markedly improved growth. A several-fold increase in vitamin D supplementation effected similar, but submaximal responses. Raw or heated soybean meal also appeared to contain a factor(s) required for maximal growth and bone calcification of turkey poults, even when the level of vitamin D3 was greatly increased.