Content of mineral elements in egg yolk of Japanese quail
1999
Baumgartner, J. | Polacikova, M. | Koncekova, Z. | Benkova, J. | Csuka, J. (Research Institute of Animal Production Nitra (Slovak Republic))
We evaluated the content of macro and micro elements in fresh yolk of 3 lines of Japanese quails selected for low and high content of yolk cholesterol, and the control population. We evaluated some weight and shape parameters of egg quality and the concentration of yolk cholesterol as well. The average egg weight was 10.2 g; of yolk 3.3 g; of egg white 5.9 g and of egg shell 1.1 g for all three studied lines. The egg shape index was 78.1%. Statistically significant differences between lines were at the weight of egg, egg-white and shell. The average content of yolk cholesterol was 1924 mg/100 g of fresh yolk for 3 studied lines. The proportion of yolk was 32.2%, of egg white 57.4%, and of shell 10.4% of egg weight. Statistically significant differences between lines were in the content of yolk cholesterol, proportion of egg white and proportion of shell. The content of mineral macro elements in 1 kg fresh yolk was as follows: phosphorus 5.3 g, calcium 1.6 g, sodium 0.7 g, magnesium 0.2 g and potassium 1.2 g. Statistical differences between lines were with calcium only. The content of micro elements in 1 kg fresh yolk in 3 studied lines was as follows: zinc 46 mg and iron 89.6 mg, statistical differences between lines were not significant. Other trace elements were evaluated only in the low cholesterol line. Their content in 1 kg fresh yolk was: 3.3 mg copper, 0.7 mg manganese, 0.026 mg cobalt and 0.2 mg chromium
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