🏆 It’s time to briefly discuss SUNFLOWER: its growth stages, the optimal conditions required, and the productivity elements formed during these stages.
🌻 EMERGENCE – 2-4 PAIRS OF TRUE LEAVES: soil temperature 6-8°C; soil moisture 70-80% FMC (Field Moisture Capacity). This is a critical period for Phosphorus, Boron, Zinc, and Manganese nutrition. During this period, the root system formation occurs, determining the plant stand density.
✅ Solution: foliar application of the biostimulant POWERFOL UNDARIA or POWERFOL FitoFarm (0.5 l/ha) to stimulate growth processes ➕ application of the comprehensive foliar micronutrient fertilizer NOVALON FOLIAR 10-45-15+0.5MgO+ME (1 kg/ha) ➕ SPEEDFOL B (0.5 kg/ha).
🌻 4-6 PAIRS OF TRUE LEAVES – BUDDING: optimal air temperature is 22-24°C; cumulative water consumption 20-25% of total requirement; plants utilize 60-70% of Nitrogen during this period. Adequate Potassium content increases plant drought resistance, while Phosphorus enhances seed oil content.
✅ Solution: foliar application of the comprehensive micronutrient fertilizer NOVALON FOLIAR 20-20-20+0.5 MgO+ME (1-1.5 kg/ha) ➕ SPEEDFOL B (1 kg/ha) to enhance pollination processes. The application of the stress reliever SPEEDFOL AMINO CALMAG (0.5 l/ha) helps reduce the negative effects of stress factors.
🌻 FLOWERING – MATURATION: optimal air temperature 24-25°C, maximum water consumption during this period (60%). Cloudy weather or air temperature above 28-30°C and moisture deficit result in incomplete head filling (from 30 to 35%). Stress factors lead to pollen sterility. During this period, the pollination percentage, final quantitative and qualitative yield indicators (1000-seed weight, oil content) are determined. Physiological maturity occurs when seed moisture is <28%.
✅ Solution: it is crucial to ensure plants with sufficient Boron before flowering and increase resistance using the stress reliever SPEEDFOL AMINO CALMAG.
🔔 Thus, yield quantitative indicators are formed before the flowering stage (inclusive): the number of seeds per head and the pollination percentage, and afterwards, the qualitative indicators are determined.
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