Soluções de niacina e estacas com diferentes números de gemas para propagação de amora-preta

Abstract

The propagation of this species is usually carried out in an asexual manner by cuttings, so the generation of information to improve this technique is fundamental. The objective of the present study was to evaluate the feasibility of the use of woody cuts, with three or four axillary buds and treatment with niacin solutions for the vegetative reproduction of blackberry. The experimental design was completely randomized, with four replicates, with a factorial of 2 x 5, corresponding to the number of axillary buds (three and four buds) and five concentrations of niacin (0, 100, 200, 300 and 400 mg L-1). After 100 days, the survival rate, the percentage of rooted cuttings, the number of shoots per live cuttings, the number of leaves per shoot, the number of roots per live cutting and the length of the largest root were evaluated. Cuttings with four buds significantly increased survival and rooting rates, while cuttings with three buds favored root elongation. The use of solutions of niacin increased the number of shoots in cuttings with three axillary buds in 63% and the number of leaves per shoot, root number and root length in 79.1%, 156.8% and 46.9%, respectively.