ENRAIZAMENTO DE ESTACAS DE AZULZINHA

Abstract

The azulzinha is an ornamental plant that occurs throughout the Brazilian territory, has great landscape potential, being a plant widely used as fodder in tropical regions. The production of seedlings of the species is done through cuttings. Thus, it was proposed to evaluate the use of growth stimulator and the presence of leaves on the rooting of stem cuttings of Evolvulus glomeratus. The experiment was carried out in a greenhouse, at the Federal Institute of Goiás – Ceres Campus, located in the municipality of Ceres, State of Goiás (15°18'30" south latitude (S), 49°35'54" west longitude (W) and 571 m altitude, in a rooting bed covered with polyethylene and nebulization system, from March 16 to May 16, 2023. The design adopted was in randomized blocks (DBC), with a 4 x 4 factorial scheme, totaling 16 treatments. The treatments consisted of four doses of growth stimulator: T1 = 0 mL L-1; T2= 2 mL L-1; T3= 4 mL L-1; T4= 6 mL L-1; and four types of cuttings: SF: leafless cuttings; 1PF: cuttings with a pair of leaves; 2PF: cuttings with two pairs of leaves and 2PFC: cuttings with two pairs of leaves cut in half, with four replications. The plot was composed of 10 plants. The variables evaluated were percentage of rooting, percentage of dead cuttings, number of shoots, average number of roots, length of roots, presence of calluses and fresh biomass of the roots. The presence of leaves influenced the rooting of azulzinha, the application of rooting stimulator provided higher rates of root formation when associated with cuttings with 2 pairs of leaves and at a dose of 2 mL L-1. In the vegetative propagation of azulzinha, the presence of leaves is necessary for better development of the cuttings.