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The aim of the study was to determine the effect of free-range raising system on production results and carcass and meat quality of broiler chickens aged 42 days, using fast growing Ross 308 line. Day-old chicks were randomly assigned to two groups, 120 birds in each. Group I throughout rearing remained indoors on deep litter while Group II was kept at free range. Production results,carcass quality, physico-chemical traits of breast and leg muscles (pH15min and pH24h, L*a*b* colour space, water-holding capacity, drip loss, thermal loss, and shear force) were determined. Housing system affected the rearing performance of birds. Higher body weight and lower mortality were characteristic of Group I. Rearing system had no effect on dressing percentage, carcass colour and carcass quality. The majority of physico-chemical parameters of breast and leg muscles were similar in both groups.
The aim of the study was to determine the effect of slaughter age of broiler chickens on macromineral levels of breast and leg muscles and their association with meat quality. Used were fast-growing Hybro chickens kept on litter and fed the uniform diet. Ten chickens weighing 2 kg each were selected for slaughter at 35, 38 and 42 day of life. Breast and leg muscles were evaluated for pH,colour (CIELAB), water-holding capacity, drip loss, cooking loss, shear force, as well as for Na,Ca, K, P and Mg content. The birds’ age had an effect on the Na and K content of breast muscles and on the K, P and Mg content of leg muscles. No significant differences were found in most physicochemical characteristics of breast meat except pH which was the lowest in the oldest birds and cooking loss which was the highest in the youngest birds. No relationship between the level of individual minerals and meat quality traits was identified in breast muscles. In leg muscles Mg level correlated positively with pH15min and drip loss, P level with pH15min, and potassium level with waterholding capacity. Breast muscles turned out to be a richer source of K, Mg and P and leg muscles contained more Na.
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