RESEARCH ON CHEMICAL COMPOSITION OF CHICKEN EGG FROM DIFFERENT SYSTEMS OF PRODUCTION (CONVENTIONAL AND ORGANIC)

Maria Bologa, I.M. Pop, Aida Albu

Abstract
The aim of this study was the comparative analysis of the chemical composition determined for 30 samples of eggs (white, yolk, mixture) from hens of Lohmann Brown Classic breed in their first production cycle. Research has been organized in two units in Romania with different systems of hen egg production (conventional and organic). Determination of gross chemical composition using specific methods in order to standards and regulations in force. Statistical analysis, revealed significant differences between the mean values calculated for white, yolk, mixture samples derived from conventional system compared with the ecological one for crude protein content, SEN, calcium, magnesium, sodium and zinc only in egg white samples and egg mixture; significant for dry matter in samples of egg white, zinc in yolk samples and phosphorous in egg mixture samples. Significant differences were recorded for crude ash content to white, yolk, mixture and crude fat content and phosphorous in samples of albumen.

Key words: chicken egg, chemical composition, organic egg, conventional egg