Sudden Temperature Fluctuations: Stress on Crops and Effective Management
Day–night temperature difference is rising significantly in winter. Day temperatures are around 28–30°C and night temperatures fall to 7–8°C, causing major physiological stress in crops.
Impact of Temperature Fluctuation on Plants
High daytime temperatures increase transpiration. Sudden cooling at night closes stomata, thickens cellular fluids and creates micro-stress in tissues. This slows growth, disturbs hormones, reduces fruit set and may lead to cracking.
Management Practices
1. Use of Biostimulants
Amino acids, humic–fulvic acids and seaweed extracts enhance stress tolerance.
2. Calcium + Boron
Strengthens cell walls, improves fruit quality and prevents cracking.
3. Potassium Management
Improves water regulation and reduces stress due to temperature changes.
4. Zinc and Manganese
Support enzyme activity during cold conditions.
5. Spray Timing
Morning or evening spraying ensures efficient absorption.
6. Mulching
Reduces soil temperature fluctuation and conserves moisture.
7. Irrigation Planning
Light irrigation before cold nights helps maintain root temperature.
