Influência do ácido indolbutírico e comprimento de estacas na propagação vegetativa de lavanda (lavandula dentata)

Abstract

Lavender (Lavandula dentata) is a plant of perennial subshrub size, used for the cosmetics, food, pharmaceutical and perfumery industries, as it has a great potential in the production of essential oil. The propagation by cuttings for this species is widely used because of the difficulty in producing seeds, and also because of the advantage of the descendants being equal to the matrix plant. The objective of the present work was to evaluate the vegetative propagation of lavender by different cuttings sizes and indolebutyric acid (IBA) concentrations. The experiment was conducted in an arched model environment, located in the Teaching and Research Unit (UNEPE) of the vegetable garden, at the Universidade Tecnológica Federal do Paraná, Câmpus Dois Vizinhos. The experimental design was completely randomized, in a 3 x 5 factorial scheme (3 stakes length x 5 IBA concentrations) with 3 replicates. The cuttings had a length of 6, 8 and 10 cm and were treated with concentrations of zero, 500, 1000, 1500 and 2000 mg L-1. The variables analyzed were height of the seedlings, percentage of rooted cuttings, length of the largest root, fresh and dry mass of roots and shoot. The percentage of rooting of cuttings was high for this species being 100%. The 1500 mg L1 dose of AIB is efficient for growth in height, length of the largest root, as well as, fresh and dry masses of roots and shoots. The 10 cm length of lavender cuttings resulted in higher growth in height and biomass accumulation.