Enraizamento de estacas lenhosas de cultivares copa de videira americana (Vitis labrusca) ou híbrida (V. labrusca x V. vinifera)

Abstract

The present study aimed to test the rooting potential of different types of hardwood cuttings of grapevine cultivars, Niagara pink, white Niagara, Isabel Precoce, Bordô and Concord Clone 30. Rooting was done on styrofoam trays with 72 cells using substrate composed of 50% washed sand and 50% vermiculite. The substrate moisture was maintained controlled through manual watering as it was needed. The experiment was conducted in a greenhouse at the experimental area in the Federal University of Pampa - Campus Itaqui/RS, using a completely randomized design in a factorial arrangement 5x3 (five scion varieties and three types of cuttings: basal third, middle third and apical), with five replicates, each replicate consisting of 18 cuttings. The evaluations were performed after 60 days of the implantation of the experimente, being evaluated rooting percentage, percentage of cuttings with callus formation, sprouting percentage, percentage of live cuttings, percentage of dead cuttings, primary root length, bud length higher, root dry mass and dry mass of the bud. The data obtained were submitted to comparison of means by Tukey test at 5%. It can be concluded from this work that the rooting was not influenced by the different types of cuttings (basal third, middle and apical), with a significant difference only for the parameters evaluated in sprouting percentage, root dry weight and dry mass of the bud, whereas for the different cultivars significant differences was observed between them, demonstrating the superiority of the cultivate Bordô that obtained the highest averages for all parameters evaluated.