TY - JOUR ID - TI - The Impact of humic acid and Moringa leaf extract on the growth and content of certain secondary metabolites of vinca plant AU - Baydaa Rasheed Hilo PY - 2022 VL - 14 IS - 3 SP - 206 EP - 217 JO - Euphrates Journal of Agricultural Science مجلة الفرات للعلوم الزراعية SN - 20723857 AB - In order to determine how adding humic acid and spraying with Moringa leaf extract will affect the growth of the vinca plant and its content of certain secondary metabolites for the fall of 2021–2022, the experiment was conducted in a nursery in Baghdad/Al-Saydiya.A factorial experiment (3×3) was conducted according to (RCBD) with three replicates,With nine treatments, , and five pots for each experimental unit, the averages were compared using the Least Significant Difference L.S.D test at the 5% probability level. The first factor involves adding humic acid to the soil at concentrations of (0, 1.5, 2.5) ml/liter, and the second factor involves spraying the plants with Moringa leaf extract at concentrations of (0, 10, 20) ml/liter.The findings show that the humic acid treatment at a concentration of 2.5 ml/liter was considerably better in terms of the number of branches (5.13), the number of leaves per plant (36.13), the percentage of dry matter (29.37%), and the chlorophyll ratio (40.56 mg/100 gm fresh). The total amount of phenols (2.18 mg/kg), flavonoids (39.40 mg/kg), vincristine alkaloid (278.5 g/gm), and vinblastine alkaloid (347.9 g/gm) have also increased significantly. Certain vegetative growth characteristics, such as the percentage of dry matter (26.26%), chlorophyll ratio (38.31 mg/100 g fresh), total amount of phenols (2.0 mg/kg), flavonoids (38.96 mg/kg), vincristine alkaloid (234.2 g/g), and vinblastine alkaloid (273.3), are significantly improved when plants are treated by spraying with Moringa leaf extract at a concentration of 20 ml/liter.

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