الفهرس 
Effect of some organic substances and mineral fertilization on productivity of monarda citriodora l. plant
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Abstract
This study was carried out during the two successive seasons of 2016/2017 and 2017/2018 at the Experimental Farm of Ornamental Horticulture Department, Faculty of Agriculture, Cairo University. The first experiment was carried out to investigate the effect of chemical fertilization (NPK) at levels 100%, 75% and 50%, natural extracts of moringa leaves extract (MLE) at doses 0:00, 1:40, 1:30 and 1:20 and algae extract (AE) at doses 0.0%, 1%, 2% and 3% as bio stimulants growth and interaction between NPK with each MLE and AE on vegetative growth, essential oil percentage and it compositions as well as chemical constituents of Monarda citriodora L. plant. In the second experiment the M. citriodora L. plant was subjected to some post-harvest factors (different harvesting stages of herb, drying methods of herb and the different storage conditions of essential oil). The results of first experiment indicate that NPK (100%) with MLE at dose (1:20) or AE at dose (3%) improved the growth characters in terms, plant height, fresh and dry weight of herb and the chemical contents of this plant in terms oftotal carbohydrate, total phenolic content, total flavonoids and antioxidant activity, In the both cut the percentage of the essential oil increased with MLE (1:20) plus NPK at 75% or AE 2% plus NPK at 100% this trend was in the two seasons. The maximum value of thymol compound obtained from foliar spraying of MLE at 1:20 or AE at 2% with NPK at 75% in the second cut. In the second experiment, the highest value of essential oil percentage was obtained at 80% of flowering harvest and air drying method of the herb. The maximum value of thymol compound was obtained in the essential oil for samples which collected at the start of the flowering stage (65.41%), and in sample of the dried herb by oven drying method at 45oC (65.58%) and in volatile oil stored in the refrigerator at 5oC for 6 months (76.10%), but these increments in thymol compound ratio was associated with a decrease in carvacrol and Þ-terpinene