Abstract: [Objective] Effects of spraying water-soluble, amino acids-containing fertilizer on the phenophase and leaves of the vines, as well as the appearance and fruit quality of Kyoho grapes, were studied.[Method] Five-year-old Kyoho grapevines cultivated in a rain-free shelter were sprayed 3 times with water-soluble, amino acids-containing fertilizers in 15 d intervals after the beginning of flowering. The vine growth, leaf properties, and fruit quality were monitored for comparison.[Result] Directly spraying the fertilizers on leaf surface hastened the fruit maturation, promoted the peel coloration, accelerated the maturity and aging of fruit-bearing and vegetative branches, increased the leaf thickness and shoot girth, and significantly raised the soluble solid content in fruit. Among the 4 differently formulated fertilizers, Treatment 4 (containing amino acid ≥ 100 g·L^-1, yellow humic acid ≥ 100 g·L^-1, trace element combination of B, Fe, Zn and Mn ≥ 20 g·L^-1) was found to allow the grapes mature for market 12 d earlier than control. The treatment also significantly increased the leaf thickness, shoot girth, leaf area, and chlorophyll content benefitting photosynthesis. Meanwhile, it enabled 90% of the one-year-old and 76% of the vegetative branches on the vines to reach maturity significantly facilitating nutrient accumulation and flowering for the following year.[Conclusion] The Kyoho grapes of Treatment 4 had the desirably dark purple color, of appealing eating quality with 18.1% soluble solids and a soluble solid:acid ratio of 54.66, and a high gross revenue of 20 000 yuan per 667 m².

Key words: water-soluble, amino acids-containing fertilizer, kyoho grape, growth, fruit quality, effects