Resumo

RAMIREZ-VILLALOBOS, Maribel del Carmen  e  SEGUNDO-URDANETA-FERNANDEZ, Aly. Effect of auxin treatments on the rooting of two Malpighia species through the air layering technique. Pastos y Forrajes [online]. 2017, vol.40, n.2, pp. 96-101. ISSN 2078-8452.

A study was conducted in order to determine the effect of auxin treatments on the rooting of two Malpighia species (semeruco), through the air layering technique. Air layers were made on branches of M. glabra and M. emarginata, and then eight auxin treatments were applied (AT): 0, 2 000, 4 000 and 6 000 mg kg^-1 of naphthalene acetic acid (NAA) and of indole butyric acid (IBA). A completely randomized design was used, with factorial arrangement and six repetitions. After seven weeks the percentage of rooted layers (PRL), percentage of live layers (PLL), number of roots per layer (NR) and length of the longest root (RL), were evaluated. No interaction of the studied factors (species by AT) was found. There were no significant differences either between the species in the evaluated variables. With the doses of 4 000 and 6 000 mg kg^-1 the highest PRL were found (85,2 and 87,5 %, respectively), as well as the highest NR and RL, without differing significantly between them. Good rooting was also obtained (62,5-64,0 %) with the AT of 0 mg kg^-1 (control), which differed significantly from the other treatments. The propagation of the two species through the air layering technique was achieved by the application of 4 000 and 6 000 mg kg^-1 of NAA and IBA, which produced the best rooting.

Palavras-chave : auxin; concentration; vegetative propagation.

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