Use of plant regulators in the propagation via cutting of umbu-cajazeira

Abstract

The umbu-cajazeira is one of the most exploited native fruits in the Brazilian semi-arid region, since its fruits are highly sought after. In this sense, the objective was to evaluate the treatment of stock plants with zinc and rooting of umbu-cajazeira cuttings. The experimental design was completely randomized, with four replications. The experiment was conducted in a completely randomized design, with nine treatments, with levels determined by the matrix "Central Box Compound" for the doses of zinc (0; 5.8; 30; 34.2 and 40 mg L^-1) and combinations with AIB doses (0; 872,35; 3.000; 5.127,65 and 6000 mg L^-1), and four replicates. Treatment of stock plants with zinc did not affect the percentage of cuttings sprouts, number, length and diameter of shoots, rooting and dry mass production of umbu-cajazeira cuttings; Indolbutyric acid directly influences the rooting of umbu-cajazeira cuttings, and the maximum concentration of 6000 mg L^-1 of IBA provides the highest percentages of adventitious rooting, with 43.75% of rooted cuttings.