Low-Protein Supplemented Diets in Ideal Protein Concept for Broiler Starter Birds

Authors

  • A. O. Fasuyi Ekiti State University, P.M.B. 5363, Ado- Ekiti, Ekiti State, Nigeria

Keywords:

Ideal protein concept, essential amino acids, essential amino acid, protein requirement

Abstract

Ideal protein concept was evaluated using growth performance and nitrogen utilization of broiler birds (0-28 days). Limiting essential amino acids (EAAs), L-Lysine, DL-Methionine, L-Tryptophan and L-Threonine were used in supplementing broiler diets in which crude protein levels were reduced across the diets. Crude protein levels were varied from 23.0% to 11.0%. Growth parameters and nitrogen retention were investigated and data obtained were analyzed statistically using Minitab (Version 16). Feed intake reduced significantly (p<0.05) across the diets with the highest value of 58.68±0.03g/b/d for birds on the control diet of 23.0% CP and the lowest FI value for birds on 11.0% CP diet with EAAs supplementation.Ditto for the average weight gain (WG).The feed conversion ratio (FCR) had the best and lowest value of 1.75±0.01 for birds on the control diet and the lowest for birds on the 11.0% CP at 3.31±0.20. The protein efficiency ratio (PER) had the highest value of 3.23±0.06 for birds on the 14.0% low crude protein diet. The average nitrogen retention (NR) had the highest significant value of 0.78±0.02gN for birds on the 11.0% CP diet. The lowest significantly different (p<0.05) apparent nitrogen digestibility value of 45.65±0.79% was obtained for birds on 11.0% low CP diet supplemented with EAAs. Crude protein can be reduced by 3 percentage points from the conventional 23.0% (NRC 1994 recommendation) to 20.0% CP without any detrimental effects on the growth performance indices of broiler starter birds (1-28 days).Protein efficiency ratios were better for growing birds on EAAs supplementation.

Author Biography

A. O. Fasuyi, Ekiti State University, P.M.B. 5363, Ado- Ekiti, Ekiti State, Nigeria

Department of Animal Production & Health Sciences, Faculty of Agricultural Sciences 

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Published

2024-07-09

How to Cite

Fasuyi, A. O. (2024). Low-Protein Supplemented Diets in Ideal Protein Concept for Broiler Starter Birds. Nigerian Journal of Animal Production, 525–528. Retrieved from https://njap.org.ng/index.php/njap/article/view/5466

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