Nebras Kadhim Abbas ⁽¹⁾ and Nihad Abdul-Lateef Ali^*(1)

(1).  Department of Animal Production, College of Agriculture University of Al-Qasim, Green, Iraq.

(*Corresponding author: Dr. Nihad Ali. E-Mail: dr.nihad@agre.uoqasim.edu.iq).

Received:12/06/2023          Accepted: 25/07/2023

Abstract: 

  This experiment was conducted from 19/3/2022 to 2/7/2022 in the poultry farm of the Department of Animal Production affiliated to the College of Agriculture / Al-Qasim Green University for a period of 16 weeks. In the experiment, 105 laying hens of the Lohmann brown type were used, at the age of 50 weeks, divided into four stages. Each stage of 4 weeks was randomly distributed to 5 experimental treatments for each treatment of 21 birds, and each treatment included three replicates per 7 birds, the groups were added to a basic diet in the following quantities (0-100-200-300-400) mg Proanthocyanidin / kg feed. The main results of the study are as follows: The third, fourth and fifth treatments recorded a significant decrease (P≤ 0.05) in the concentration of the enzyme Aspartate transaminase (AST) in the blood serum. As for the enzyme (ALT) Alanine Aminotransferase, the second, third, fourth and fifth treatments recorded a significant decrease (P≤ 0.05) compared to the first treatment. (The control. There was a significant improvement (p≤0.05) in the concentration of estrogen hormone (pg/ml) in blood serum in the third, fourth and fifth treatments at the fourth productive period, compared to the first treatment (control). The second, third, fourth and fifth treatments showed a significant decrease (p≤0.05) in the concentration of cholesterol, triglycerides and low-density lipoproteins in the egg yolk when stored for different periods compared to the first treatment, with a significant improvement (p≤0.05) in the level of high-density lipoproteins. Proanthocyanidin treatments recorded a significant (P≤ 0.05) improvement over the first treatment (control) in the concentration of glutathione (µmol/mol) and the concentration of catalase and superoxide dismutase (µmol/mol) in egg yolk when stored for three periods (0, 30, and 60) day, while a significant decrease (P≤ 0.05) was recorded in the concentration of Malondialdehyde in the egg yolk (µmol/mol) compared to the first treatment (control).                                                                

Keywords: Proanthocyanidin, physiological characteristics, oxidation indices of eggs.

Full paper in Arabic: pdf