![كتاب Influence of Variations in Dietary Calcium Phosphorus Ratio on Performance and Blood Constituents of Calves](https://www.pdf-books.org/kutubpdfcafe/cover/imagenotfound.webp)
الكاتب: Multiple References
An interrelationship in the metabolism of calcium and phosphorus has long been recognized and the proper ratios of the two have been established for many spe cies of simple-stomach animals. For these species it is generally agreed that the op timal ratio of Ca:P lies between 1:1 and 2:1. Although levels of the two elements in volved influence the optimal ratio, research with rats has indicated that ratios ranging from 1:1 to 2:1 are desirable (Bethke et al., '32; Cox and Imboden, '36; Boutwell et al., '46). In growing chicks it appears that Ca:P ratios from 1:1 up to 2.5:1 may be used with satisfactory results (Bethke et al., '29; Wügus,'31). Growing swine exhibit optimal performance when fed diets containing ratios from 1:1 to 2:1 (Bethke, '33) with the optimum being about 1.4:1 for the 100-pound pig (Chap man et al., '55).
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