Chemical composition of muscles of hybrid broiler chickens during prolonged feeding
2002
Suchy, P. | Strakova, E. | Hucl, J. (Veterinarni a Farmaceuticka Univ., Brno (Czech Republic)) | Jelinek, P.
The objective of the present paper was to study changes in the chemical composition of breast and thigh muscles in three hybrid combinations of broiler chickens (Ross 308, Cobb and Hybro) during feeding extended till the 52nd day of age. On the 42nd and 52nd day the breast and thigh muscles of 120 individuals were analysed for the concentrations of dry matter, proteins, fat, ash, Ca, P and Mg. Breast and thigh muscles differed significantly in their chemical composition and consequently, in their nutritional value. Breast muscles were characterised by an increased concentration of proteins (22.5-22.7 %), ash (1.11-1.13 %) and phosphorus and by a reduced concentration of dry matter (25.8-26.0 %), fat (2.1-2.5 %) and calcium. On the other hand, the main features of thigh muscles were an increased concentration of dry matter (28.5-28.6 %), fat (8.9-9.3 %) and calcium and a decreased concentration of proteins (18.3-19.1 %), ash (0.97-0.98 %) and phosphorus. Magnesium concentrations in breast and thigh muscles were very similar.
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