ENRAIZAMENTO DE ESTACAS CAULINARES DE Bougainvillea

Abstract

Bougainvillea is one of the most widely used ornamental plants in landscaping, standing out for its hardiness, adaptability to different conditions, and the intense coloration of its bracts. The species is mainly propagated by cuttings, but it presents rooting difficulties, requiring the use of growth regulators and biostimulants. Thus, this study aimed to evaluate the rooting of stem cuttings of Bougainvillea glabra subjected to different concentrations of indolebutyric acid (IBA) with or without seaweed extract. The experiment was conducted in a randomized block design (RBD) in a 5 x 2 factorial scheme, totaling ten treatments and 320 cuttings. The treatments consisted of different concentrations of IBA (0, 1000, 2000, 3000, and 4000 mg L⁻¹), applied with and without seaweed extract. The results indicated that intermediate doses of IBA, mainly associated with seaweed extract, provided greater root and vegetative development. Among the treatments, 2000 mg L⁻¹ of IBA associated with seaweed extract stood out, showing greater root length and volume, demonstrating to be the most efficient strategy for propagating the species by cuttings.