Effect of Fertilization with High Nitrogen NPK Fertilizer and Spraying with Seaweed Extract on the Volatile Oils of Rosemary Rosmainus officinalis L.

Abstract

An experiment was carried out in the canopy of the Department of Horticulture and Landscaping / College of Agriculture / University of Karbala, Al-Hussainiya district, for the winter agricultural season 2022-2023, to study the effect of fertilization with high-nitrogen NPK fertilizer and spraying with seaweed extract and the interaction between them on volatile oils in rosemary plants. The experiment included a chemical fertilizer of the type (Solucat) by 4 concentrations (0,2,4,6) gm liter 1-added to the soil and symbolized by (N) and the second factor is spraying with seaweed extract (equilibrium type)) by 4 concentrations (0,1,2,3) ml liter 1-Rasha “on the shoot, symbolized by (T) and their overlap. The experiment was carried out within the randomized complete block design (RCBD) and with three replications. The experiment included 48 experimental units in 3 plants / replicate 144 plants (anvil) starting on 1/11/2022 until 1/5 / 2022. The results showed superiority The plants were significantly affected by the level of the compound fertilizer NPK (6) gm L-1 in the physical properties of the volatile oil and the active compounds (volatile oil density, percentage of oil (Linalool), Rosemari acid, Cineol) as it gave the highest rate of (0.8935 mg ml -1, (4.303) (760.4, 1126.1, 1310.9) mg gm-1, plant, compared to the control treatment if it gave the lowest rate of (0.8713 mg ml-1, 3.723%) (239.1, 596.8, 649.6) mg gm-1, plant and concentration (3) ml liter 1-algae extract was significant, as it gave the highest rate of (0.8860 mg ml-1, 4.268%) (606.3, 1045.7, 1047.6) mg gm-1, compared to the comparison treatment, which gave the lowest rate of (0.8768 mg ml-1). -, 4.035%) (369.9, 714.5, 859.7) mg gm-1 plant. As for the interaction between the two study factors, it gave the highest rate of (0.9100 mg ml-1, 4.330%) (993.5, 1199.7, 1479.9) mg gm-1 plant, as compared to the control treatment, as it gave the lowest rate of (0.8700 mg ml-1, 3.410%) (175.4,407.1, 589.5) mg gm-1. Significant superiority in all physical properties of volatile oil and active compounds.