The extemporaneous production of vines was evaluated, through a second annual prune, in the climatic conditions of the South of Minas Gerais. The experiment was carried out in a non irrigated vineyard, of the cultivar Syrah, clone 747 ENTAV-INRA, grafted on 3309 C and conducted in the vertical system, with spacing of 2,50 x 1,50 meters. The first pruning of plant's formation was accomplished in August of 2002, while the production pruning was in the month of January in branches completely lignified. The complete cycle of production was of 164 days and the precipitation accumulated in this period was 480 mm, being that wasn't registered any precipitation on the last 15 days before the harvest. The values of the water potential stayed low (absolute mark) during the whole cycle, at the same time that, the transpiration of the leaves and the assimilation of the carbon stayed in high levels, characterizing the absence of water stress during the production cycle. The production reached 8,45 t.ha-1 with 21,75° brix and 100 Meq.l-1 in the harvest, allowing to conclude that in the conditions of this experiment is possible to obtain an autumn cycle for the vine with good production rates, without the employment of the irrigation.
pruning; water supply; gas exchange; Vitis vinifera
