Micronutrients Status of Bio fuel Plant (Moringa) Irrigated By Diluted Seawater As Affected By Silicate And Salicylic Acid

A pot experiment was conducted in the greenhouse of the National Research Centre to evaluate the effect of salt stress and foliar amendments on mineral status of moringa plants. The treatments of salinity were irrigated by diluted seawater with 2000 and 4000 ppm salts and tap water (285 ppm) as a control. The treatments of silicate treatments were 300 ppm SiO2 as potassium silicate and 300 ppm salicylic acid + 300 ppm SiO2 more than distilled water as a control. Significant responses were detected in Zn, Mn and Cu ppm as a result of salt stress but Fe ppm without significant responds to this treatment. The depression effect in nutrients of plants received Si+SA exceeded those induced by Si alone. Generally, the all calculated ratios (Mn with N, P, K and Na) lowered by the high salinity level and the reverse were true by the lesser level of salinity. The ratios of macronutrients and micronutrients as affected by salinity, foliar application as well as the interactive effect between them were included.