A Study on the Appropriated Level of Protein on the Performance of Indigeneous Chickens in Various Period of Ages

Abstract

An experiment was conducted in order to investigate the effects of protein levels on native chickens performance during 0-6, 7-12 and 13-18 weeks of age. One hundred and nighty two birds of each age were subjected to 4 dietary treatments. The experimental diets had 4 levels of protein as 20, 18, 16 and 14 percent (0-6 weeks) and 17, 15, 13 and 11 percent (7-12 weeks) and 14, 12, 10 and 8 percent (13-18 weeks). All experimental diets had isocaloric (2,700 MEkcal/kg). Feed and water had ad libitum. The results demonstrated that the native chickens 0-6 weeks of age had significantly differences in feed intake, daily weight gain and feed efficiency. The birds which fed 20 and 16 percentage of protein in the diets had better in feed efficiency than the others, (P>0.05). The indigeneous chickens 7-12 weeks of age had not significantly diffrences in feed consumption and daily weight gain but feed : gain ratio had significantly differences. Futher more, the feed efficiency of birds, which had fed 13, 15, and 17 percentage of protein in the diets were not significantly differences. However, the native chickens 13-18 weeks of age show that feed consumption and daily weight gain were not different (P>0.05), but feed efficiency had significantly differences. Therefore, the birds had fed 14, 12 and 10 percentage of protein in the diets were not significantly differeces on feed efficiency.