Potassium nitrate (kno₃) seed priming enhances soybean seed performance

Area of Science:

• Agricultural Science
• Plant Physiology
• Seed Technology

Background:

• Soybean productivity relies on advanced cultivation and high-quality seeds.
• Variability in seed physiological quality impacts seedling establishment and crop yield.
• Seed priming is a technique to enhance seed performance before sowing.

Purpose of the Study:

• To evaluate the effect of potassium nitrate (KNO₃) seed priming on soybean seeds of varying physiological quality.
• To determine optimal KNO₃ concentrations for enhancing seed germination and seedling vigor.
• To assess the impact of priming on cold tolerance and biomass production.

Main Methods:

• Soybean seeds of high, medium, and low physiological quality were primed with KNO₃ solutions (0%, 1.0%, 1.5%) for 12 hours.
• Analyzed parameters included germination rate, germination speed, root protrusion, cold tolerance, seedling length, and shoot/root biomass.
• Statistical analysis was performed to determine the significance of priming treatments.

Main Results:

• Priming with KNO₃ particularly benefited low-quality soybean seeds, improving germination, cold tolerance, and biomass.
• Medium-quality seeds showed decreased germination at 1.5% KNO₃.
• High-quality seeds exhibited enhanced root biomass with 1.5% KNO₃ priming.
• Priming reduced physiological quality differences among seed lots.

Conclusions:

• Potassium nitrate (KNO₃) priming is an effective strategy to enhance soybean seed quality and performance.
• The benefits of KNO₃ priming are most pronounced in low-quality seeds, mitigating initial quality deficits.
• Careful selection of KNO₃ concentration is necessary to avoid negative impacts on medium and high-quality seeds.