ISSN 2329-9797
International Journal of Agricultural Economics and Extension ISSN 2329-9797 Vol. 12 (6), pp. 001-007, June, 2024. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Evaluation of Protein Nutritional Value and True Metabolizable Energy Content in High Oil Poultry By-Product Meal
Kalvandi Omid1, Janmohammadi Hossein2* and Sadeghi Ghorbanali1
1Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Iran.
2Department of Animal Science, Faculty of Agriculture, University of Tabriz, Iran.
Accepted 22 March, 2024
The three high oil poultry by-product meal (PBPM) samples were obtained from three poultry slaughter-houses in East Azerbaijan Province, Iran. For evaluating of protein quality, 126 male broiler chicks in a completely randomized design as factorial arrangement was used and fed experimental diets from 8 to 17 days of age. The experimental diets consisted of a nitrogen-free basal diet based on corn starch and glucose and six semipurified diets. Semipurified diets were obtained by replacing each of the three PBPM samples with portion of cornstarch and glucose in the nitrogen-free basal diet to provide 6 and 10% crude protein (CP). Sixteen cecectomized roosters (4 roosters per PBPM sample and 4 roosters for determining endogenous energy loss) were used for determination of true metabolizable energy (TMEn) content of PBPM samples. TMEn content of PBPM samples was different significantly (p<0.05) and was 3696 kcal/Kg as average. PER and NPR values varied from 1.29 to 1.727 and 2.463 to 3.001 and showed significant differences among PBPM samples (p<0.05). The results showed that with increasing CP level, protein efficiency ratio (PER) values was increased (p<0.05). Net protein ratio (NPR) value was not affected by CP level. As the assay length increased from 6 to 10 days, PER and NPR values decreased (p<0.05). Protein quality ranking, with PER, among three PBPM samples is the same in two period assays.
Key words: High oil poultry by-product meal, protein quality, metabolizable energy, cecectomized rooster.