Tipo de poda e cianamida hidrogenada no crescimento vegetativo e reprodutivo de videira variedade Cabernet Sauvignon na fronteira oeste do RS

Abstract

Vitiviniculture is an expanding activity in the state of Rio Grande do Sul, showing promise in regions still little explored as the West Frontier of the state. In this context, research on the effect of pruning type and breaking dormancy in vines in the wine growing region is incipient. The objective of this work was to evaluate the influence of the guyot type and spore cord pruning with and without the use of hydrogen cyanamide the vegetative and reproductive development of Cabernet Sauvignon grapevines. Plants with 13 years of age, carried out in a trellis system, were subjected to pruning of the guyot type and sporulated cord which were treated and not treated with commercial product Dormex® containing hydrogen cyanamide, sprayed on plants at 2% v / v concentration. The experimental design was completely randomized in a 2x2 factorial scheme, with two types of pruning, with and without regulator application, where the treatments consisted of 10 replications, totalizing an experimental area of 40 plants. The variables were analyzed 70 days after the dry pruning and included: average diameter of branches, average length of branches, number of leaves per branches and number of bunches per plant. The results were submitted to analysis of variance and comparison of means by means of the F test and Tukey test at 5% of probability. The spore cord pruning produces thicker branches and more leaves than pruning guyout and the use of cyanamide increases the diameter of branches, number of leaves and length of branches. The number of bunches is not influenced by the types of pruning nor the application of cyanamide.