EVALUATION OF DIFFERENT FORMS OF ORGANIC FERTILIZERS ON THE PRODUCTIVITY OF VEGETATIVE GROWTH, OIL YIELD AND THE ACTIVE INGREDIENTS OF MARJORAM PLANT (Origanum majorana, L.)

The present investigation was carried out at El-Kasasin Research Station belong to Ismailia Governorate, Agriculture Research Center in the Department Medicinal and Aromatic plants, Egypt during the two successive seasons of during 2019 and 2020 on Origanum majorana, L. plants. The objectives of this work aimed to study the responses of Origanum majorana, L. to different levels of compost and different adding ways of compost tea and their interaction between them on the productivity of vegetative growth, oil yield and oil chemical components . A spite plot design with three replicates was followed in this study, levels of compost treatments; 0, 15 and 30 m/fed. were the main plots, while compost tea; control, spraying, soil drench and spraying + soil drench were accepted the sub plots. Results showed that, the increase in levels of compost led to a direct increase in all growth characters. adding 30 m/fed compost log highest values in all characters of vegetative growth (plant height (cm), number of branches per plant, dry weight of leaves per plant (g) and per feddan (Kg). ) and oil yield (essential oil percentage, essential oil per plant (ml), per feddan (L) of marjoram plant. On the other hand, adding compost tea through spray + soil drench together for the best results in all characters of vegetative growth and oil yield together. The best treatment resulting from the interaction between the levels of compost and methods of adding compost tea 30 m/fed. compost with spraying + soil drench for compost tea together. Which recorded the best values in all characters under study. In another way, the interaction treatment affected active ingredients of marjoram oil, where the results were clarified that, terpinen-4-ol compound recorded the highest percentage in the active ingredients of marjoram oil, where the increase reached 65.061% compared to control 31.057 % and other treatments, during the application of 30 m/fed. compost + spraying with soil drench for compost tea together.