Effects of dietary protein level on compensatory growth, carcass characteristics and some blood parameters of broiler chicks
2005
Ebrahim, Kamal-El-Din A. | Authman, Muhammad M.
Effects of dietary protein level on compensatory growth, carcass characteristics and some blood parameters of broiler chicks were studied by experimenting five crude protein (CP) phase feeding programs. Two hundred one-day old unsexed Ross broiler chicks were divided into five groups of which the first was fed the NRC (1994) system that was considered as control. The NRC levels of protein in the three age phases starting (0-3 wks), growing (3-6 wks), and finishing (6-7 wks)were 23, 20 and 18% respectively. While, the second group received diet containing 23, 18, and 20%CP, the third group received diet containing 20, 23, and 18%CP, the fourth group received diet containing 18, 23, and 20% CP and the fifth group received diet containing 20% allover the three periods. The results obtained can be summarized as follows. No significant difference was observed in body weight gain in different groups during 0-3 wks of age as compared to the contro l group. While, there was a significant increase in body weight gain in group which received program (18, 23, 20% CP) during the period 6-7 wks of age as compared to control and the other groups. During 3-6 wks of age, as well as the whole experimental period (0-7 wks) there was significant increase in body weight gain in groups which received feeding programs (20, 23, 18%CP) and (18, 23, 20%CP) as compared to the control and the other groups
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