Özet:

Foliar fertilization is often performed at the intensive farming regions in the world. Surfactant-adjuvants are used for increasing the efficiency of the applied fertilizer, adherence to the leaves, providing easy entry into the leaves depending on the plant species and many other reasons. In this study, it is aimed to determine effects of some surfactant-adjuvants, actively used in the market, on the concentrations of some micronutrients (Fe, Mn, Zn and Cu) in lettuce. A total of 10 applications; control, six different surfactant adjuvants, tap water (standard), pure with pH adjusted to 6.0 and sugar water (addition of sugar to tap water) with 0.5% foliar fertilizer (5% Fe, 6% Zn, 4% Mn and 0.5% Cu) were used. The study was carried out under the controlled conditions with 3 replications, as completely randomized designs, in lettuce. Foliar fertilizer was applied one time in the middle stage of its vegetation period. The findings were examined and all applications were increased plant nutrient concentrations compared to control. The highest increase (Fe, 57.4%) was obtained compared to other applications with tap water (pH: 7.67; EC: 0.65 dS/m) is observed by commercially named “Leon” (100% Organic silicone) cationic surfactant-adjuvants. Commercially named "Miller Spray", (70% acryl polyoxyethylene glycol phosphate, nonanionic), is determined as the second product. On the other hand, Zn, Cu and Fe concentrations of plant were found lower amount with sugar water application,than the standard application. As a result, it has been seen that different chemical structures of surfactant-adjuvants have different efficiencies in foliar fertilization. It is thought that the use of surfactant-adjuvants made of organic silicone will be more successful in lettuce growth.

Anahtar Kelimeler: