RESPONSE OF THE OLIVE SEEDLINGS OF MANZINILLO VARIETY TO FOLIAR SPRAY WITH SOME GROWTH STIMULI

A study was carried out in the lath house at Horticulture and Landscape Department, College of Agriculture and Forestry, University of Mosul during the 2020 growing season. The aim was to demonstrate the importance of foliar spraying with three levels for each of the Nano iron chelate (15, 30 and 45 mg. L-1), liquid organic fertilizer (Compo) (2, 4, and 6 ml. 1 liter-1) and seaweed extract fertilizer (Alga600) (5, 10 and 15 g. 1 liter-1) in improving vegetative growth and mineral content of olive seedlings variety "Manzanillo. The comparison treatment consisted of spraying with distilled water only." The most important results obtained showed the significant superiority of the treatment of foliar spray with liquid organic fertilizer (Compo) in most of the studied characteristics. This was particularly obvious in the spraying treatment with a concentration of 6 ml. 1-1. This recorded a significant superiority over the rest of the treatments, especially the comparison treatment, in terms of leaf content of nitrogen, zinc, chlorophyll, carbohydrates, protein, and the increase in seedling height. This was followed by the treatment of foliar spraying with nano iron chelate fertilizer at a concentration of 45 mg. L-1 was significantly superior to the comparison treatment with compared with the traits, the iron content of the leaves and the increase in the diameter of the seedlings. There were no significant differences in all the fertilizer treatments, including the comparison treatment compared with the traits, the leaves content of phosphorus and potassium.