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

Abstract

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

Influence of Growing Region on Targeted Anthocyanin Profile, Color, Phenolics, and Antioxidant Activity of Grape Juice

“…"Among the total reducing sugar contents of grape juices from different locations, 36% of the highest amount (393.65 g L-1) was found in MMJV, followed by 33% in MMJP (364.65 g L-1), and the lowest in MMJN (30%). Our results agree with reports that grapes grown in regions with high temperatures and low rainfall contain more sugar than grapes grown in other environments" [19]. Similar to TSS, the maximum amount of total protein was found in MMJP and the minimum in MMJN.…”

“…Due to the high average daily maximum temperature (31.9°C), the MMJP had higher mean values for acidity and TSS than the MMJV and MMJN, which indicates that the MMJP contains a greater number of solids. During growing season average maximum temperature and GDD were highest in Zhangye due to Merlot, Pinot and Vidal grapes berries from Zhangye location had higher TSS than Jiayuguan and Wuwei [19]. The °Brix/total acidity represents the balance between the acid and sweet taste of grape juice.…”

Dampak La Nina pada Produksi dan Uji Banding Waktu Pangkas Vegetatif Tanaman Anggur (Vitis Vinifera) di Kota Palu

“…Negara -negara penghasil anggur seperti Cina Buletin GAW Bariri (BGB) Vol. 4 No. 2 Tahun 2023 : 50 -59 Dampak La Nina pada Produksi …………….……….…….......................................................... Ambinari R P, dkk [4] [5] , Jerman [6] , Brazil [7] , Italia [8] , Spanyol [9] dan Cili [10] melakukan penelitian serius terkait cuaca dan iklim.…”

“…4 No. 2 Tahun 2023 : 50 -59 Dampak La Nina pada Produksi …………….……….…….......................................................... Ambinari R P, dkk [4] [5] , Jerman [6] , Brazil [7] , Italia [8] , Spanyol [9] dan Cili [10] melakukan penelitian serius terkait cuaca dan iklim. Penelitian ini bertujuan meningkatkan pemahaman tentang hubungan antara cuaca, iklim, dan produksi anggur untuk mendukung produktivitas dan kualitasnya.…”