The objective of this research was to evaluate the prediction equations of the protein requirements for broiler breeder pullets, that was previously determined at Faculdade de Ciências Agrárias e Veterinárias UNESP - Jaboticabal. The equations were compared with standard recommendation for the used strain. Two hundred and eighty eight broiler breeder pullets for Hubbard Hy-Yield strain at 5 weeks old were assigned to a randomized design with two treatments and six replication of 24 pullets until 14 weeks and 20 pullets from 14 to 20 weeks old. One treatment was represented by the protein standard recommendation for the strain (control) and another by the following prediction equations: from 5 to 8 weeks - CP (g/bird/day)= 2.02. W.75+ .350.G, from 9 to 14 weeks - CP = 2.02. W.75 + 0,406.G and from 15 to 20 weeks old - CP = 2.02. W.75+ 0.463.G, where P is body weight (kg) and G is daily weight gain (g). The prediction equations for protein, in spite not affect the body weight and uniformity, but they promoted smaller breast percentage, higher abdominal fat percentage and fat in carcass. This result is attributed to the low protein intake determined by the prediction equations, and consequently deficiency in some amino acids that were not possible to add to the diets.
broiler breeder pullets performance; factorial method
