International Journal of Agricultural Sciences ISSN: 2167-0447 Vol. 12 (2), pp. 001-006, February, 2022. © International Scholars Journals

Full Length Research Paper

Evaluation of protein and energy quality of poultry by-product meal using poultry assays

Masoud Jafari1*, Yahya Ebrahimnezhad1, Hussein Janmohammadi2, Kambiz Nazeradl1 and Mahboob Nemati3

1Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran.

2Department of Animal Science, Faculty of Agriculture, Tabriz University, Tabriz, Iran.

3Faculty of pharmacy, Tabriz University of Medical Science, Tabriz, Iran.

Accepted 18 October, 2021


In the present study, two experiment were conducted to evaluate three poultry by-product meal (PBM; A, B and C), that is produced in commercial rendering plants. In first experiment, true amino acids (AA) digestibility and TMEn of the PBM were determined using the precision-fed cecectomized rooster. In second experiment, 1 week old male chicks were fed from 8 to 21 days of age with a corn-SBM diet or diets containing 5 or 10% PBM C formulated to be equal in total or digestible AA to the corn-SBM diet. TMEn and true amino acid digestibility varied among PBM (P < 0.05). Mean true digestibility coefficients (percentages) for AA in PBM A, B, and C were 81.75, 67.80 and 66.31, respectively. Feed efficiency of chick fed diet containing 5 or 10% PBM C on a digestible AA basis or 5% PBM C on a total AA basis was not significantly different (P > 0.05) than that of the chicks fed the corn- SBM diet. The results of this study indicated that PBM has substantial nutritional value for poultry and diets containing 10% PBM in chick diets had no detrimental effects on performance if the diets were formulated to contain adequate levels of digestible AA.

Key words: Energy, protein quality, poultry by-product meal.