Produção de biomassa de manjericão em função de lâminas de irrigação e adubação potássica

Abstract

Irrigation and mineral nutrition of plants are one of the most important technologies used to increase productivity and enable greater efficiency and stability in agricultural production. Thus the objective of this experiment was to analyze the effect of interaction between irrigation and potassium on growth and biomass production in basil, a plant widely used for various purposes: ornamental, spice, medicinal, aromatic, industrial and perfumery. The trial was conducted in a greenhouse in the experimental area of the Campus II University of Oeste Paulista (UNOESTE), Presidente Prudente SP. The experiment was comprised, four irrigation levels (T1 - 25% ETc, T2 - 50% ETc, T3 - 100% ETc, T4 - 150% ETc) and four potassium levels (0 kg ha-1, 50 kg ha-1, 100 kg ha-1 e 200 kg ha-1) with three replications. The variables analyzed included the length of the field of basil (CPA), root length (RL), root dry mass (RDM), shoot fresh weight (FMAP), shoot dry mass (SDM) and leaf area (AF). There was no interaction between irrigation levels and potassium doses tested for the variables, except for leaf area (LA) showed that interaction between irrigation levels and potassium levels to 1% of significance, with the doses of Potassium significant only for the depth of 100%, the addition of this element in the soil caused increased leaf area. It is recommended that the dose of 200 kg ha-1 K associated with water depth of 100% of the crop water needs, aiming to increase profitability, as this blade had the highest water use efficiencies.