The use of marjoram leaf powder and vitamin E in the productive traits and some biochemical blood characteristics of laying hens

• Sirwan Salih Mohammed 1*,Mohammed Abdulraheem Mohammed 2,Sarmad Talib Abdulazeez 3

  Author

The study was carried out at the College of Agriculture / University of Kirkuk/Department of animal production for the period from 16/11/2025 to 14/2/2026 in order to identify the impact of adding marjoram leaf powder and vitamin E on productive traits and some biochemical characteristics of blood for laying hens. One hundred and twenty Lohmann White laying hens were used in the study, and hen was 54 weeks old, were used for period of 12 weeks. The  first treatment received a basal feed (as control) without any nutritional supplements. The second treatment was assigned to a control diet with 250 mg of vitamin E/kg diet.  As the  third, fourth, fifth and sixth treatments received control diets with 0.5%, 1%, 1.5% , 2% of marjoram leaf powder/kg diet. The supplementation of leaf powder obtained from marjoram at the concentration of 1.5% led to a statistically significant difference  (p ≤ 0.05) in egg production  during the total period . In addition, a concentration of 1% resulted in  (p ≤ 0.05) an increase in egg mass and a reduction (improvement) in the feed conversion ratio (FCR). The study suggested the addition of medicinal herbs like marjoram leaf powder (Origanum majorana) at a dietary concentration of 1% kg can improve laying hens' productive performance

• pdf