EN
Single plant supplements were added to the ration fed to Ross 308 broiler cockerels. The chickens were held in four feeding groups until their 42 days of age. The birds of all the groups were fed on the same standard mixes. Group I represented the control group which received mixes without the supplement. The birds of group II received a feed supplement of 1% dried fine echinacea herb (Echinacea purpurea), group III received 0.3% of crushed raw garlic (Allium sativum). The chickens in group IV were twice a week provided with raw ginger (Zingiber officinale) water extract (5.5 g·cm-3) to drink. Chemical composition and physicochemical properties of breast muscle were analysed while fresh as well as on 4-month storage at –18°C