Caracterização produtiva de videira cultivar bordô em função de diferentes porta-enxertos na região de Lapa-PR

Abstract

Part of the commercial vine plantations is carried out with grafted seedlings, where the canopy cultivar can be influenced by the materials used as rootstock. However, in some cultivars the grafting technique is not usually used, and then its cultivation is carried out by free foot. In view of the above, the objective of this work was to verify the influence of different rootstocks on the productive characteristics of the Bordô cultivar. As plant material, vine plants of the Bordô cultivar were used, conducted in Geneva Dupla Cortina with 1.5 m between plants and 3.5 m between rows (1,900 plants ha-1), grafted onto six rootstocks, as follows: IAC 571 -6; IAC 572; IAC 766; Kobber 5 BB; Paulsen 1103; Rupestris du Lot. The experimental design used in the field was completely randomized blocks with four plots, each plot consisting of three plants, totaling 72 plants. For the evaluation of physical and chemical characteristics of the fruits, 54 bunches were collected per block, three from each plant, nine per plot. The different rootstocks used did not statistically influence the variables: berry mass, stem mass and soluble solids. Significant effects were verified for mass, diameter and length of the bunch, number and diameter of berries, total number of bunches, production and productivity. In terms of production of the Bordô cultivar on different rootstocks, the Bordô grape plants grafted on Rupestris du Lot rootstock showed the lowest values for total production and productivity (1.265 kg/plant and 2.412 ton/ha), these values being lower when compared to rootstocks IAC 571-6 (10,227 kg/plant and 19,440 ton/ha), IAC 572 (8,045 kg/plant and 15,282 ton/ha) and Paulsen 1103 (7,695 kg/plant and 14,617 ton/ha) . In this sense, it is possible to verify that the used rootstocks exerted influences on the productive characteristics of the Bordô copa cultivar on different rootstocks.