DEVELOPMENT OF THE SAUVIGNON BLANC VARIETY (Vitis vinifera) ON ROOTSTOCK GRAVESAC AND 101-14 IN THE MUNICIPALITY OF SÃO JOAQUIM – SC

Resumo

The altitude region of Santa Catarina stands out for the production of grapes and wines of excellence due to the climatic conditions of temperature, radiation and volumes of rain favorable to the development of vines. One of the varieties of interest is the Sauvignon Blanc of the Vitis vinifera species. Plants of this variety tend to be vigorous and require careful pruning treatment. Rootstocks can influence the vigor of the cultivar, affecting the productivity and maturation of the grapes. The objective of this work was to evaluate the productive characteristics of the Sauvignon Blanc vine on Gravesac and 101-14 rootstock. The experiment was carried out at the experimental station of the Agricultural Research and Extension Company of Santa Catarina, a region classified by Köppen as Cfb, with a humid temperate climate with a temperate summer. The productive indices of average bunch weight, production per plant, and productivity were evaluated. The productivity per plant was obtained from the average weight of the bunches. The production data per plant (kg), planting density (plants/hectare), were used to stipulate the production per hectare of each block. The number of branches and leaves were used to estimate the leaf area per branch, plant and hectare. Data were submitted to analysis of variance (ANOVA). The contents of Total Soluble Solids (°Brix) and Total Titratable Acidity (meq.L-1) were also determined. In terms of productivity and quality of the grapes, an average production of 2.66 kg per plant and 7.06 t/ha was observed, with soluble solids and total titratable acidity of 20.6 °Brix and 99.31 meq. .L, respectively. Regarding productivity, different rootstocks significantly influenced the cultivar scion. Grape quality variables did not differ between the evaluated rootstocks. There was no influence of the rootstocks on the productive and qualitative aspects under the conditions of the present study.