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.
الاستاذ الدكتور أياد العلاف | Dr. Ayad Hani Alalaf | 19962