What to Do When Grapes Bloom
The blooming period of grapes is a crucial stage that determines fruit yield and quality. Scientific management measures directly affect pollen activity and successful pollination. This article systematically explains the key points of flowering maintenance and artificial intervention techniques, helping growers accurately master each operational link.
Three Key Management Points During Grape Bloom Period
Standardized Operation of Spike Thinning
Strong branches should retain 1-2 healthy spikes, while weak branches need to be completely cut. Keep the complete secondary spike during thinning and use a disinfected pair of scissors to trim at a 45-degree angle. It is recommended to retain 15-20 high-quality spikes per square meter of trellis to ensure nutrient concentration (G-Y).
Key Points of Boron Fertilizer Application
Apply a 0.2% borax solution during the bud formation stage and early blooming stage, and combining with a 0.3% potassium dihydrogen phosphate solution for better results. Perform operations before 10 a.m. on a sunny day, focusing on spraying the flower spike area, with an interval of 7-10 days between the two sprays. On boron-deficient land, apply 1.5 kg of borax per mu as a base fertilizer.
Technical Parameters of Water Management
Keep the soil moisture content at 60%-65% during the flowering period and control the air humidity between 50%-60%. Use a drip irrigation system to supply water in sections and avoid excessive watering. Excavate drainage ditches in advance during the rainy season to ensure no waterlogging in the orchard.
Grape Artificial Pollination System Solution
Optimization Measures for Natural Pollination
Female flower varieties need to be planted with 10%-15% bisexual flower varieties as pollination trees, with an inter-row spacing of no more than 8 meters. Releasing 200-300 wall bees per mu during the flowering period can increase the natural pollination rate by over 35%.
Steps of Artificial Auxiliary Pollination
Collect bisexual flowers about to open between 8-11 a.m. and dry them in the shade at 25°C for 24 hours to collect pollen. Use an electric pollination device with a wind speed of 0.5 m/s or adopt the bristle pen dotting method. Focus on treating 30-50 flowers in the middle of the spike and repeat the operation 2-3 times.
Key Points of Management After Pollination
Avoid spraying within 24 hours after pollination and maintain a temperature of 20-28°C. Check the ovary expansion after 3 days and replenish pollination promptly. When the fruit setting rate reaches over 60%, perform spike setting and eliminate poorly developed spikes.
Scientific flowering management can increase the fruit setting rate by 40%-60%, and combining precise artificial pollination techniques can improve fruit uniformity by two grades. It is recommended to integrate with an IoT monitoring system to adjust temperature and humidity parameters in real-time, achieving standardized production management.