EFFECT OF IRRIGATION INTERVALS AND SALICYLIC ACID ON SOME OF THE PHENOTYPIC PHYSIOLOGICAL TRAITS OF Pinus brutia Ten. SEEDLINGS

The experiment was conducted in the nursery of the Department of Forest Science/ University of Mosul/Faculty of Agriculture and Forestry/ during the period from April to December 2024 to study the impact of three watering periods (1 day , 3 days,5 days) and three concentrations of salicylic acid (zero, 200, 400) mg. Seedling -1 in some of the phenotypic and physiological qualities of Pinus brutia Seedlings. The results showed that watering every(1) day had a significant impact on most of the vegetative and physiological growth qualities. As for the watering period every(5) days, it gave the highest significant increase in the percentage of proline. As for the effect of salicylic acid, the results showed that the concentration of (400) mg.Seedling-1 had a significant effect on longitudinal Height seedling, leaf area, total chlorophyll and carbohydrates, while the concentration was (200)mg.L-1 has a significant impact on the diameter of the leg, while the concentration (200 and 400)mg.L-1 was given Significant increase in the quality of proline for bilateral interference between both watering periods and salicylic acid. The results showed that watering every (1) day and spraying with salicylic acid at a concentration of (400) mg.Seedling-1 has given the highest rates in most of the studied qualities, and the overlap between the watering period every 5 days and salicylic acid in concentrations of 200 and 400 mg.L-1 in the leaf content of proline.