African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6638

Full Length Research Paper

Utilization of poultry by-product meal in diets for broiler chickens

Masoud Jafari1*, Yahya Ebrahimnezhad2, Hussein Janmohammadi3 and Hassan Ghahri4
1Department of Animal Science, Astara Branch, Islamic Azad University, Astara, Iran. 2Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran. 3Department of Animal Science, Faculty of Agriculture, Tabriz University, Tabriz, Iran. 4Department of Animal Science, Urmia Branch, Islamic Azad University, Urmia, Iran.
Email: [email protected]

  •  Accepted: 17 January 2012
  •  Published: 05 March 2012


This study evaluated diets containing poultry by-product meal (PBM) formulated on an equivalent digestible amino acid (AA) basis compared to a corn-soybean meal (SBM) diet. Three PBM (A, B, and C) produced in commercial rendering plants were evaluated. Mean true digestibility coefficients (percentages) for 15 AA in PBM A, B, and C were 81.75, 67.80 and 66.31, respectively. In a chick trial, 1-wk-old male chicks were fed from 8 to 21 and 21 to 42 days of age, a corn-SBM diet or diets containing 5 or 10% PBM formulated to be equal in digestible AA to the corn-SBM diet. From 8 to 21 d post hatch, feed efficiency of chicks fed 5 or 10% PBM A or 5% PBM C was equivalent to that of chicks fed the corn-SBM diet; however, dietary inclusion of 5 or 10% PBM B or 10% PBM C depressed feed efficiency even on a digestible AA basis. Chicks fed from 21 to 42 days of age, a diet containing 10% PBM B, had significantly lower weight gain and feed efficiency than chicks consuming the corn-SBM diet; however, diets containing 5 or 10% PBM A and C or 5% PBM B yielded weight gain and feed efficiency that was similar to the corn-SBM diet. The results of this study indicated that up 10% inclusion of two of the three PBM in chick diets had no detrimental effects on performance if the diets were formulated to contain adequate levels of digestible AA.


Key words: Broiler chicks, digestible amino acid, poultry by-product.