Rosmany Aires Cunha Martins
Abstract:
Aimed to evaluate the effects of lecithin, starch and silicone on leaf fertilization efficiency, using salts and chelates as a source of micronutrients. For this, an experiment was carried out in which the effects of the addition of different adjuvants in relation to the absorption and translocation of zinc and manganese in the form of salts and chelates were evaluated. A completely randomized design with six replications, with four factors under study and two levels each, making a factorial 2x2x2x2, totaling sixteen treatments. In addition to the treatments, control was added as an additional treatment, thus making a total of 102 plots. Each plot consisted of a pot containing a cauliflower plant. The treatments consisted of combinations between 2 sources (sulfate and chelate) and the presence or absence of three substances in the spray solution: defatted soybean lecithin (L), a commercial siliconate (S) and cassava starch gel (A). The effects were determined by analyzing the zinc and manganese content of new leaves 30 days after spraying. The addition of lecithin increased the absorption of sulfate applied zinc whereas the siliconated product increased the absorption of chelated zinc alone. Both lecithin and silicon product, when added to spray solution, increased the manganese content. Starch gel did not increase the absorption of any micronutrients, leading even to a reduction in the absorption of zinc chelate.
