The best values of electrolytic balance (EB) in diets for blood levels of calcium, phosphorus and total protein for 42 days old broiler chickens was determined. 1728 Ross male chicks were used, which were fed with two basal diets with 20 or 23% of crude protein (CP) in the initial phase and one basal diet with 20% of CP during growing phase. They were combined with the following EB levels: 0; 50; 100; 150; 200; 250; 300 and 350mEq/kg. A completely randomized design with a factorial arrangement of treatments was used with six repetitions of 18 birds and 96 experimental units. One bird was chosen from each experimental unit for blood collection. The content of calcium, phosphorus and total protein in the blood of these birds at 42 days of age was evaluated. The best values of EB for the nutritional plans of 20-20% and for 23-20% were 101 and 131mEq/kg of crude protein, respectively. Significant differences were not found among the EB studied for the serum concentrations of calcium and phosphorus levels.
poultry industry; electrolytic equilibrium; homeostasis; minerals; plasma
