Foliar biofertilizer applied in cover fertilization in the production of lettuce cv. Veronica

The use of biofertilizer through leaves can be a supplement of the applied fertilization in the soil and in the fastest correction of possible deficiencies. Due to that, this practice has been increasingly used by the producers in olericultural species, especially broadleaves. The present work aimed at evaluating the performance of lettuce plants (cv. Veronica) in response to biofertilizer doses in different concentrations applied through leaves. The experiment was installed in the completely randomized blocks design with three replications and each plot was constituted by 64 plants. The treatments consisted of doses biofertilizer applied through leaves, in solution, in the concentrations: 0%; 10%; 20% and 30% of biofertilizer. The appraised characteristics were: diameter of the head (DH), number of leaves (NF), plant heigh (PH) and total fresh matter of shoot (TFMS). There was no effect of the biofertilizer concentrations over DH. NL, PH and TFMS were changed by the biofertilizer concentrations, emphasizing the concentration of 20% that tended to favor the expression of those characteristics.