Different Varieties of Grape Blossom Period Introduction
Grapes, as an important economic fruit tree, their flowering period directly affects the quality and yield of the fruit. Different grape varieties show significant differences in their flowering periods, and mastering these characteristics is crucial for improving planting benefits. This article will provide a detailed analysis of the flowering characteristics of mainstream grape varieties and share professional flowering management solutions.
Mainstream Grape Varieties Flowering Characteristics
Early Maturing Variety Representative: Summer Black Grapes
Originating from Japan, Summer Black grapes inherit the excellent genes of the Kyoho series. After germination in late March, they enter full bloom in mid-May. The development cycle of their flowers is about 110 days, and they can be harvested by late July. This variety has compact berries without seeds, with a fruit flesh hardness of 18-20°Brix, and a perfect balance of sugar and acidity at maturity.
Mid to Late Maturing Variety Model: California Green Grapes
The Eurasian green grapes bloom in April to May, and mature in August to September in the northern production areas. The improved early maturing strains can be harvested as early as June, with conical clusters covered with bloom, making them highly storage and transportation-resistant, with a commercial rate of over 90%, especially suitable for large-scale planting.
Special Hybrid Variety: Golden Finger Grapes
The European and American hybrid Golden Finger grapes germinate in early April, bloom in late May, and complete their development cycle by early August. Their long conical clusters can reach 800g, with yellow-white skin enclosing fruit flesh with a sugar content of 17-21%, and the skin toughness index is 30% higher than that of conventional varieties.
Key Techniques for Grape Flowering Management
Accurate Temperature and Humidity Control
Keep the daytime photosynthesis temperature at 28±2°C and the nighttime respiration temperature at 16-18°C. The air humidity during the flowering period is strictly controlled at 50%RH, and the soil moisture content is maintained at 60% of the field capacity, which can reduce the incidence of gray mold by over 40%.
Nutrition Supply Strategy
Apply high-phosphorus water-soluble fertilizer (N-P₂O₅-K₂O=10-50-10) 7 days before flowering, combined with a 0.3% boric acid foliar spray. After the flowers fall, apply a balanced fertilizer (20-20-20) and add 5% humic acid to improve fertilizer utilization efficiency, increasing the fruit-setting rate to 85-92%.
Through scientific variety selection and precise flowering period management, the economic benefits of grape planting can be significantly improved. It is recommended that growers establish a flowering period management log, record daily temperature and humidity changes and phenological progress, and develop personalized management plans based on variety characteristics to achieve the goal of high-quality and high-yield production.