Response of Wine Grape Quality to Rainfall, Temperature, and Soil Properties in Hexi Corridor

This study aimed to clarify the relationship between grape ( Vitis vinifera L.) quality and environmental factors (climate soil), elucidate theoretical basis provide technical guidance for rational planning of cultivation area precise regulation mode in future. The fruits three different cultivars, Pinot Noir, Merlot, Vidal, as well soil samples meteorological data were collected from wine growing areas (Wuwei, Zhangye, Jiayuguan) Hexi Corridor, Northwest China. Principal-component analysis (PCA) correlation conducted understand with weather conditions properties. results showed that titratable acid content berries was significantly negatively correlated average temperature August September, minimum temperatures April October, mean annual temperature, degree days total nitrogen content, positively rainfall rainfall, available potassium content. In addition, pH juice However, it PCA fruit scores ‘Vidal’ Jiayuguan, ‘Merlot’ ‘Pinot Noir’ Wuwei highest, respectively. conclusion, contents acid, pH, Brix° are greatly affected by climate factors. ‘Vidal’, ‘Merlot’, suitable planting Wuwei, Nowadays, few reports focus on conditions. Based investigation differences climate, soil, production among using statistical methods studied, which could references clarifying reasons why affect select cultivation.