تأثير سيليسيم بر روي عناصر غذايي و مقدار نيترات در كاهو

The Effect of Silicon on Nutrient and Nitrate Content in Lettuce

Considering the positive effects of silicon On salinity resistance by some agricultural plants, an investigation was conducted with a completely randomized design of three replications. The main objective was to determine the effect of silicon on nutrient content and nitrate accumulation in lettuce. Electrical conductivity wasadjusted at 3 mmhos/cm through addition of NaG Silicon was added through addition of a silicate compound in the ratio of 0, 0.5, 1.0 and 2.0 mM/lit. Mean analysis showed that calcium and magnesium contents of lettuce were increased in 0.5 mM L" treatment while a higher amount of silicon decreased the amount of calcium, magnesium and phosphorus. Increasing of Si up to 2.0 mM L" increased the amounts of potassium, total nitrogen and nitrate in the plant, whereas the amount of Na was decreased through this addition of silicon