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Eggshell quality in commercial laying hens is one of the most important problems of poultry industry. The number of eggs with damaged shell ranging from 8 to 10%, produces considerable economic losses every year. In this article the effects of nutritional factors - macroelements (calcium, phosphorus, magnesium, sodium, chloride), vitamins (D₃, C), microelements (manganese, zinc, copper), aluminosilicate...
Effect of antinutritive factors in the feed (phytic acid, nonstarch polysaccharides) and kind of trace element forms (inorganic vs organic) was presented on the basis of literature review. Phytic acid, through formation of indigestible complexes with microelements, significantly decreases its utilization by the organism. Also non-starch polysaccharides showed of ten similar influence. Organic forms...
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