Abstract:

To improve the yield and quality of grapes and realize the steady development of grape industry in Zhangjiakou, studies on efficient and green production technologies of grape were carried out. Using 5-year-old seedlings of ‘Fengguang’ grape as the test material, we explored the effects of Zhiqianjin, a trace element and water-soluble fertilizer, on the growth indicators of ‘Fengguang’ grape, including the leaf net photosynthetic rate, leaf stomatal conductance, leaf transmittance rate, single fruit weight and fruit characters. Then, we selected the best method of Zhiqianjin application. The results showed that the best treatment was to spray Zhiqianjin twice with 800-dilution on the seedlings of ‘Fengguang’ grape. Compared with the control (spraying clear water for 3 times), it significantly increased the leaf net photosynthetic rate by 0.113 μmol/(m²·s), the leaf stomatal conductance by 0.030 mmol/(m²·s), the intercellular CO₂ concentration by 1.282 μmol/mol, the transpiration rate by 0.143 mmol/(m²·s), single grape weight by 0.72 g, and soluble solid content by 1.10 percentage points, and deepened the peel color of ‘Fengguang’ grapes and increased the sense of aroma. Expert score was increased by 8 points. The experiment can lay a solid foundation for improving the quality and efficiency of grape production.

Key words: ‘Fengguang’ grape, Zhiqianjin, net photosynthetic rate, fruit characters, quality