Rooting of ‘Pedro Sato’ guava cuttings as a function of diameter, types of cuts and treatment with bioestimulant

Abstract

For the propagation of guava seedlings to occur, it is necessary to address numerous factors, therefore, the objective was to verify the influence of the diameter and type of cut on the base of ‘Pedro Sato’ guava tree cuttings. Experiment I: implemented in a 3 × 5 factorial scheme, consisting of three types of cut at the base of the cutting and five biostimulant concentrations (0, 5, 10, 15 and 20 g L-¹). Experiment II: implemented in a 2 × 5 factorial scheme, composed of two stem diameters (D1: 3 - 3,99 mm; D2: 4 - 4,99 mm) combined with five biostimulant concentrations (0, 5, 10, 15 and 20 g L-¹), and both experiments were conducted in a completely randomized design, with 4 replicates of 10 cuttings per plot. Considering the above, it could be concluded that the use of biostimulant increases the rooting rate. Cut with the removal of lateral portions at the base of the cutting promotes greater mortality, while evidencing less increase in root length. In experiment II, it was found that cuttings with diameter between 4 and 4.99 mm show greater survival rate at concentrations of 0 and 5 g L-¹, while cuttings with diameter between 3 and 3.99 mm have higher rooting rate at concentrations 0 and 5 g L-¹ but with high mortality rate at concentration of 5 g L-¹.