| By monitoring the microclimate factors and the growth and sugar content of grape fruit in different mist control modes (WP1, spray water on the grape trellis for 1 h; WP2, spray water under the grape trellis for 1 h; WP3, spray water on the ground for 1 h) in the extreme arid area, the change of the microclimate factors in the vineyard and the relationship between the microclimate factors and the growth and sugar content of grape fruit were analyzed. The results showed that the temperature and humidity of vineyard were effectively managed by mist regulation. Compared with CK treatment, the average daytime temperature was 2.9℃~3.3℃ lower and the average temperature was 2.5℃~2.9℃ lower (conventional drip irrigation, does not spray water). The average night humidity was 4.7%~5.5%. Meanwhile, it promoted the growth and sugar accumulation of grape fruit. Compared with CK treatment, WP1, WP2, and WP3 increased the vertical berry size by 2.88, 1.76 mm, and 0.9 mm, the horizontal berry size by 1.33, 1.80 mm, and 1.76 mm, average weight of the berry by 0.22, 0.26 g, and 0.25 g, and the sugar content by 7.75%, 3.96%, and 5.53%, respectively. During the growth and development of grape berry, the average temperature and the average daytime temperature were the key microclimate factors that affected the vertical and horizontal dimensions of berry, and the average night humidity was the key microclimate factor affecting the grape weight and sugar content. The average daytime temperature was 30.4℃~33.8℃, and the average night humidity was 49.5%~50.5%. It was close to the maximum values of the modeled values of the vertical diameter, the horizontal diameter, and the average weight of the fruit. According to the relationship and regression model, it can be used to analyze and predict the growth and sugar content of grape in this area. |