Effect of complex phytobiotics on morphochemical characteristics of cobb 500 cross mail broiler chicks

The dynamics of live weight, the morphological composition of Cobb 500 cross broiler chickens was studied at 1, 21, 28, 33, 38 and 42 days of age. It was determined that the gain in live weight and carcass weight of male broiler chickens increased progressively up to the 33 day of age, and then they started decreasing. The average daily live weight gain of the chickens in the experimental groups (over the entire brooding period) exceeded the similar parameters of the control groups by 5.58%. The broiler males in the experimental groups were bigger than the males in the control groups by 3.98% (P < 0.05) in the live weight and by 4.42% (P < 0.05) in carcass weight at the age of 33 days, by 5.12% and 5.51% (P < 0.05) at the age of 38 days and by 5.50% and 5.92% (P < 0.05) at the age of 42 days, and by 4.65%, 5.00% and 6.03% (P < 0.05) in muscle mass accordingly. The results of chemical studies proved that with age the muscles of male chickens became dehydrated. However, the water content in the muscles was 0.5-1% higher than in the muscles of the broilers of other crosses. © 2019, Agricultural Academy, Bulgaria. All right reserved.