Resumen

ALBANY V., Nilca R. et al. Propagación asexual del guayabo mediante la técnica de acodo aéreo. Agronomía Trop. [online]. 2004, vol.54, n.1, pp.63-73. ISSN 0002-192X.

Most of the guava, Psidium guajava L., trees grown in the northwestern Zulia State (Venezuela) have been propagated by seed, bringing about high genetic variability in commercial plantations. For such a reason, an evaluation of air layering as a technique of vegetative propagation of guava, Psidium guajava L., was performed. In the first experiment, a study was made of the application of naphthaleneacetic acid (NAA) and indolebutyric acid (IBA) at 5.000 mg kg^-1 each and a mixture of both (2.000 and 1.000 mg kg^-1, respectively) using river peat as substrate. In a second experiment, we applied 5.000 mg kg^-1 NAA and evaluate two substrates: river peat and the mixture of river peat+phenolic foam (3:1v/v). Experiments were carried out in a five-year-old commercial orchard, in Mara County-Zulia State. The experimental design was of blocks at random, with twelve repetitions per treatment. The mixture of river peat+phenolic foam media favored a bigger percentage of rooted layerings (92,07%). Based on the percentage of rooted air layerings, number and longitude of primary roots, we concluded that NAA at 5 000 mg kg^-1 was the best stimulative for the formation of roots in air layers using media mixture of river peat+phenolic foam.

Palabras clave : Psidium guajava L.; guava; naphthalene acetic acid; indole-3-butyric acid; media.