The Effect of Different Levels of Dietary Crud Protein During Different Age Stages on the Productive Performance of ROSS 308

Abstract

An experiment at the poultry Field-Department of Animal Production/College of Agriculture / University of Anbar, to know the effect of dietary protein levels during different age periods on productive performance of broiler chicks. The experimental treatments included: T1: The control treatment with standard protein levels (22, 20 and 18%) for the starter, grower and finisher respectively, T2: raising the crude protein level to 24% for the first week of the starter stage to continue after that with a standard protein level until the fifth week to reduce then to 16% protein in the last week of the finishing stage, T3: The crude protein level was raised to 26% for the first week of the starter stage, to continue after that at with a standard protein level until the fifth week, to then be reduced to 14% protein in the last week of the finishing stage,T4: It started with a controlled level of crude protein, and in the first week of the growing stage, the protein level was raised to 24%, to continue after that at a standard protein level, and in the last week of the finishing site, the crude protein was reduced to 16% and T5: It began with a control level for crude protein and in the first week of the stage growing The protein level was raised to 26%, to continue after that at a record protein level, and in the last week of the finishing site, the crude protein was reduced to 14%. The results showed that the T1 and T2 treatments were significantly superior (p ≤ 0.05) and achieved the highest results of body weight in the first and second weeks.