Regulation of calcium metabolism in laying hens Maria Georgopoulou

Regulation of calcium metabolism in laying hens Maria GeorgopoulouIn laying hens, calcium (Ca) is of great importance in the eggshell, which requires for synthesis the deposition of about 2. 2 g of Ca in the form of Ca carbonate (CaCO3). As egg production will be repeated daily over a long period (50 to 80 weeks), the hen finally exports huge amounts of body Ca for this purpose. Moreover, as the eggshell synthesis occurs mainly during the dark period, when the digestive tract is empty, an additional Ca reserve is

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