Vegetative development of vine rootstock cultivars in brazilian cerrado conditions

In the State of Goias, studies related to the vine\u0027s responses to the region\u0027s edaphoclimatic conditions are scarce. Therefore, the objective of this work was to evaluate the growth of three vine rootstock cultivars, IAC 572 \u0027Jales\u0027, IAC 313 \u0027Tropical\u0027 and IAC 766 \u0027Campinas\u0027, in the region of Goiânia, GO, after drastic pruning for uniformity. To evaluate the growth of rootstocks, the experiment was carried out in random blocks, in a double factorial scheme (3x7), with five replications, each repetition formed by a plant. The first factor consisted of three rootstocks: IAC 313 ‘Tropical’, IAC 572 ‘Jales’ and IAC 766 ‘Campinas’. The plants were evaluated after 45 days after a drastic uniformization pruning, totaling seven evaluations (45, 60, 75, 90, 105, 120, 135 days after pruning), this being the second factor. The diameter of the main branch at the height of grafting (80 cm) and length of the main branch were evaluated. With the data on the diameter and length of the main branch, the absolute growth rate was calculated. The IAC 572 \u0027Jales\u0027 rootstock cultivar has greater vigor for branch growth, being 69% and 47.3% longer in length, and 49.8% and 18.8% longer in diameter than the IAC rootstock. IAC 313 \u0027Tropical\u0027 \u0027and\u0027 IAC 766 \u0027Campinas\u0027, respectively. The IAC 766 ‘Campinas’ rootstock cultivar, although it has low vigor in branch growth, presents satisfactory development.