Differential Analysis of Fruit Quality of ‘Cabernet Sauvignon’ Grapevines with Different Shoot Densities

Abstract

The basic physicochemical indicators, phenolic composition and aroma composition of fruits from five-year-old ‘Cabernet Sauvignon’ grapevines with four shoot densities of 15, 20, 25, and 30/m from the wine production area of the Qingtong Gorge at the eastern foothill of Helan Mountain in Ningxia were analyzed, and principal component analysis (PCA) was used to investigate monomeric anthocyanin contents and comprehensive fruit quality. The results showed that there were differences in the physical indicators of grape bunches and individual grapes and the chemical indicators such as sugar, acid, phenolics, and aroma substances among different shoot densities (P 20 > 30 > 25/m. In conclusion, for ‘Cabernet Sauvignon’ grapes in the wine production area of the Qingtong Gorge, the comprehensive fruit quality was best at a shoot density of 15–20/m.

Keywords

• grape; fruit; ‘cabernet sauvignon’; shoot density; quality analysis