Enraizamento de estacas em cultivares de oliveiras promissores para a Serra da Mantiqueira

Abstract

Currently, there is lack of information about cutting rooting of olive cultivars for the highlands of Mantiqueira Range, in Minas Gerais. The objective of this study was to evaluate the rooting of different cultivars using perlite and sand as substrates. Cuttings of cultivars Maria da Fé, Mission, Penafiel, Grappolo 575, Galega, Ascolano 315 and Grappolo 54 were collected in January and prepared with approximately 12 cm in length, 4 mm in diameter and 4 internodes, keeping four leaves in the first two nodes. The cuttings were treated with 3 mg L-1 IBA for five seconds and, then, put to root in plastic trays, containing perlite or sand and kept under intermittent nebulization system in a greenhouse. Both substrates were fertilized with Nippoterra® , (diluted to 25 g L-1), in the rate of 62 mL of solution per liter of substrate. The percentage of cuttings forming callus, rooting and the average number of roots were determined after 61 days. Cuttings of the cultivars Ascolano 315 and Maria da Fé showed the best results. The substrate sand increased the rhizogenic capacity of olive cuttings.