Effect of Mineral, Bio-NPK Soil Application of Young Olive Trees and Foliar Fertilization on Leaf and Shoot Chemical Composition

The present study was carried out on one year -old two olive cultivars, Coronaiki as oil cultivar and Manzanillo as double purpose (table and oil) cv. in a private farm located at western desert along Cairo, Alexandria Road (50 km from Cairo), Egypt and planted at 5 x 6 meter apart in sandy soil and irrigated with drip irrigation system trees were similar in growth vigour and received the common horticultural practices. The main objectives of the research was studying the effect of mineral and Bio-NPK soil application on leaf and shoot chemical composition. Results indicated that Manzanillo leaves were the richest in chlorophyll A&B and the poorest in Caratenoids, while the reverse was true in Coronaiki leaves during the two seasons of study. On the other side, Coronaiki cultivar had the richest leaves and exceeded statistically the Manzanillo olive cultivar regarding leaf, N; P; K; Ca, Mg; Fe; Mn and Zn contents from one hand, but the poorest leaves of least value of Cu content from the other hand. Coronaiki plants were statistically the richest in both shoot nitrogen and total carbohydrates contents as well as C/N ratio while the reverse was found with Manzanillo young trees. The obtained results revealed that, bio -NPK fertilizer treatments soil applied significantly increased all leaf amino acid content and mineral composition, shoot nitrogen and total carbohydrates as well as C/N ratio contents increased by T6 (Kotengin + Biofertilizer + K SO ) soil applied solely which were the superior in this respect.