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Evaluation of three feeding programs for broilers based on sorghum-soybean diets with different protein percentages

Published: November 23, 2017

Summary

Introduction Current broiler growth rate is partly the result of an intense genetic selection; 1 therefore, feeding is important to achieve the maximum productive expression. Success attained until now in this practice has been due to better knowledge of the functions that different nutriments carry out, which in turn allows higher precision when establishing nutrimental needs. 2 To be able ...

Related topics:

#Feed formulation

#Enzymes in poultry nutrition

Authors:

Carlos Lopez Coello

UNAM - Universidad Nacional Autónoma de México

Ernesto Avila Gonzalez

UNAM - Universidad Nacional Autónoma de México

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Comment

Juarez Donzele

Universidade Federal de Viçosa - UFV

14 de diciembre de 2019

Interesting work, Dr. Carlos. However, I have some doubts:

- First, it seems to me that the objective of the work would be to evaluate the effect of the reduction of the crude protein of the diets on the yield and the characteristics of the carcass of the chickens subjected to different feeding programs from 1 to 49 days. If this was really the goal, there is no justification for changes in the ingredients used in food preparation. Even in this study, there seems to be no need for these changes, which even makes the comparison between feeding programs unfeasible, since the composition of diets also varies.

- Second: What would be the justification for using higher levels of lysine in the last two phases evaluated when using the four-phase program compared to the other two programs?

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