EVALUATION OF PROTEIN REQUIREMENT PREDICTION EQUATIONS FOR PULLETS FEEDING.

N. K. SAKOMURA, M. R. B. BENATTI, R. BASAGLIA, J. B. K. FERNANDES, R. NEME, F. A. LONGO

Abstract


This experiment was conducted to evaluate the prediction equations for crude protein requirements. Such equations were previously determined at the College of Agronomical and Veterinarian Sciences ? Unesp ? Jaboticabal, Brazil. Sixhundred 3-to-8-week-old Lohmann LSL pullets were randomly distributed in 3 treatments, 6 replicates with 18 pullets each. We compared the performance of pullets fed according to strain recommendation, ad libitum feeding, and prediction equations. Between the 3rd and the 18th week, the pullets fed ad libitum had higher feed and nutrients intakes and therefore higher body weight comparing to pullets fed controlled feeding and according to prediction equations. At the 18th week, the pullets fed based on equations had body weight similar to the recommendations to Lohmann. However, such pullets had worst uniformity. The body weight of pullets fed controlled and ad libitum feeding was greater than those recommended to 8 Lohmann. A better uniformity was also seen. The treatments applied in the growing period did not affect the egg production during the production phase. In conclusion, the evaluated prediction equations for protein requirement could not be recommended to pullets feeding.
KEY-WORDS: Prediction equation. Protein requirements. Pullet?s performance.



DOI: http://dx.doi.org/10.15361/2175-0106.2005v21n1p07-14