Author(s):

Emad Saleh Hamed

Abstract: This work was carried out during the two successive seasons of 2016 and 2017 at North Sinai Governorate to study the possibility to decrease quantity of applied chemical nitrogen fertilizers to Origanum syriacum var. syriacum plants by using of foliar CO₂ nano-fertilizer "lithovit". The experiment included five treatments:- application of the full recommended N dose, 3/4 N dose + foliar spray with lithovit, 1/2 N dose + foliar spray with lithovit, 1/4 N dose + foliar spray with lithovit and foliar spray with lithovit only. The work was planned as a complete randomized block design. Results showed that application of 3/4 N dose followed by 1/2 N dose + foliar spray with lithovit significantly super passed full N dose in growth, herb and oil yield characters while in other cuts these variations were non-significant. 1/2 N dose + foliar spray with lithovit could be recommended as the best treatment. The identified components of volatile oil were α-pinene, β-pinene, myrcene, ρ-cymene, γ-terpinene, α-phellandrene, terpineol, thymol and carvacrol.

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