Variabilidade espacial do vigor, produção e qualidade na casta Trincadeira

Mestrado em Viticultura e Enologia - Instituto Superior de Agronomia / Faculdade de Ciências. Universidade do PortoIt was studied the possibility of using remote sensing for the identification and management of spatial variability of vigor, production and quality of a vineyard plot, variety Trincadeira, situated in the wine region Tejo, Sub-region of Tomar. Based on the captured of multispectral imagery, it was calculated a vegetation index, the NDVI (Normalized Difference Vegetation Index) which is related to the vigor of the vines, the plot was divided into two distinct zones and were defined two classes: High (0.08-0.18) (less vigor) and Low (0.31-0.83) (higher vigor). Additionally, with information and agronomic data collected in a sample field of grapevines it was verified that the two zones delineated based on two classes of NDVI have significant differences regarding the parameters of the canopy, yield and its components, strength, composition of the grape and wine quality. The segmentation of the harvest showed that the Low modality has significantly higher values in the parameters characterizing the canopy, yield and its components face to high modality. However, the modality High has significantly higher values for total acidity, alcohol content, anthocyanins, total phenolics, polymeric pigments and total intensity of color and organoleptic characteristics face to modality Low