Ayad H. E. Alalaf , Ayad T. Shayal Alalam , Waleed M.E. Fekry
الملخص الانجليزي
The expansion of the use of safe alternatives such as bio-fertilizers and organic fertilizer programs in
fruit seedlings has become part of a system known as clean cultivation because of its many
advantages that contribute to improving growth, productivity, quality and production of a safe crop as
well as preserving the environment by reducing or avoiding the use of chemical fertilizers, Therefore,
this study was conducted to demonstrate the importance of adding biological fertilizer (Gorabac G)
in three concentrations (5, 10 and 15 grams. Seedlings-1), liquid organic fertilizer (Compo) in three
concentrations (4, 6 and 8 ml-1) and organic fertilizer (Rice residues (in three concentrations (0.5,
1.0 and 1.5 kg. Seedlings-1) in addition to the comparison treatment (without adding any type of
fertilizer) in improving the vegetative growth and mineral content of grapefruit seedlings grafted on
Sour orange, he biological fertilizer (Gorabac G) used in the study and in particular the concentration
was 15 grams. Seedlings-1 had a significant effect in obtaining the highest values for most of the
studied traits, as this treatment was significantly superior to the comparison treatment with the traits
(leaf content of nitrogen, phosphorus, potassium, iron, chlorophyll, carbohydrates and proteins in
addition to the increase in the height and diameter of seedlings), so within similar circumstances the
study recommends using This concentration of this vital fertilizer is to get strong, well-growing
seedlings.
الاستاذ الدكتور أياد العلاف | Dr. Ayad Hani Alalaf | 21379