Avaliação da cultura de alface submetida a diferentes dosagens de regulador de crescimento vegetal.

Abstract

Lettuce (Lactuca sativa L.) is a plant originated from Mediterranean, belonged to Asteraceae family and has been used, for a long time, as food by the population. Its market has been growing year after year, due to the fact that it is easy to be prepared, contains a huge number of nutrients and if well combined, using different colors, with any protein, can replace a meal. Thus, the present study aims at evaluating the influence of regulator’s concentration of vegetable growth, which contains in its composition (CINETIN 0.09 g/L (0.009 % w/v)) + (GIBBERELIC ACID, as GA3 0.05 g/L (0.005 % w/v)) + (4-INDOL-3ILBUTYRICO ACID 0.05 g/L (0.005 % w/v)) in lettuce cultivation. Furthermore, pursuing improvements like better development and better number of leaves, better quality, decrease of negative effects such as stress, and harvest time. The experiment was carried out with crisp lettuce, applying four doses (0; 50 ml/ha; 100 ml/ha; 150 ml/ha) according to package insert (8 applications during the cycle, from the 4º day of implantation, with sequential applications every 4 days), in disturbed soils, with fertilization appropriate for the cultivations, in an irrigated environment and covered with shade. It was evaluated numbers like: total of commercial leaves, plant height (cm), total transverse diameter, stem diameter (cm), commercial (MFCP) and non-commercial (MFNC) fresh mass (g per plant). The regulator of growth had effect over the evaluated parameters, highlighting the treatment T4 (150 ml/ha).