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Copyright of European Poultry Science / Archiv für Geflügelkunde is the property of Verlag Eugen Ulmer and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Three types of feed phosphates: monocalcium (MCP), dicalcium (DCP), and calcium-sodium (CSP), were used in Lohmann Brown laying hens feeding. The content of macro- (Ca, P, Mg, Na) and microelements (Cu, Fe, Zn) in blood serum of birds was determined at a peak and in final phase of laying period. Dicalcium phosphates (DCP) significantly increased mean content of phosphorus when compared to CSP, calcium in relation to MCP, and iron when compared to both phosphates (MCP and CSP). Monocalcium phosphates (MCP) in turn, significantly increased concentration of copper when compared to DCP. Generally, more macroelements (except sodium) and microelements were observed in blood hens in the final phase of laying period, when compared to the first phase of laying period (peak). [ABSTRACT FROM AUTHOR]