Perfil vitivinícola, fenologia e exigência térmica de videiras “Niágara rosada” e “branca” na região de Laranjeiras do Sul/PR

Abstract

The cultivation of vines occurs in several regions of Brazil, however in the state of Paraná there is a lack of information about the crop, especially in the region of Laranjeiras do Sul/ PR. The study of phenology is pertinent because it allows to verify the variations of the answers that the plants can give according to the climatic changes of the environment in which they are inserted. In addition, from the record of the duration of phenological stages, the producer can program crop management. Therefore, the objective of this work was to register the phenology and the thermal requirement of the cultivars Niágara Rosada and Branca in the region of Laranjeiras do Sul/PR. The experiment was carried out at a family farmers' property located in Laranjeiras do Sul/PR. The evaluations were carried out every two days, from pruning, being evaluated five phenological stages: green tip; Full bloom (50% of open flowers); Grain size "pea"; Beginning of bunch compaction and full maturation. The experimental design was completely randomized (DIC) with 10 replicates. The sample unit consisted of 20 plants, totaling 10 plants per cultivar. For "Niagara White", 124 days cycle and thermal accumulation of 1273,159 GD and for "Rosada", 132.1 days and 1425 GD were registered. The cycle, as well as the accumulation of degree-days of cultivar "Niagara Rosada" was superior when compared to the one of the "Niágara Branca".