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SULCEROVA, H., MIHOK, M., JŮZL, M., HASCIK, P.: Eff ect of addition of pollen and propolis to feeding mixtures during the production of broiler chickens ROSS 308 to the colour of thigh and breast muscle and pH determination. Acta univ. agric. et silvic. Mendel. Brun., 2011, LIX, No. 6, pp. 359–366 The aim of this study was to verify infl uence of pollen and propolis added to the feeding mixture in the diet of broiler chickens Ross 308 to colour breast and thigh muscles in relation to pH values. A total of 198 units 1 day-old Ross 308 hybrid combinations divided into 6 groups according to the feeding mixtures were investigated on meat quality characteristics changes. Muscle colour of breasts and thighs was measured and compared with pH in three times, pH 1 , pH 2 and pH ult . Feeding with various additions to feeding mixtures for chicken showed small impact of low content (200 or 300 mg.kg −1 ) propolis to meat quality characteristics. Higher eff ect on breast quality was found in group with 400 mg.kg −1 pollen addition to feed, there was faster and deeper postmortal process level found, although without negative impact on meat quality. Meat colour and muscle pH of chicken in this experiment was pale and had low ultimate pH. In these parameters were found correlation. Chicken meat of this experimental animals was paler and had the lowest ultimate pH, altough in group with higher addition it wasn’t confi rmed. Raw meat breast pH was signifi cantly lower than thigh muscles in all measurement time. Various feeding especially pollen had signifi cant impact on breast colour which was paler although without negative displays attended of pH decline. Signifi cant relationships are between breast and thigh L*a*b* values and pH 1 respectively.

acta universitatis agriculturae et silviculturae mendelianae brunensis

Effect of addition of pollen and propolis to feeding mixtures during the production of broiler chickens ROSS 308 to the colour of thigh and breast muscle and pH determination