Salinity injury — also known as salt stress — is one of the most common abiotic challenges facing rice cultivation, especially in coastal regions and the Mekong Delta during the dry season. When rice plants absorb excessive salt ions, they suffer stunted growth and reduced photosynthesis, leading to lower yield and poor crop performance.
To help farmers better manage salt stress, this article provides additional practical insights into how to prevent and treat salinity injury effectively.
Field Strategies to Reduce Salt Stress
A. Proper Water Management Is Fundamental
Salt accumulates in rice fields through irrigation with brackish or saline water. Managing water levels correctly helps prevent salt buildup. Key practices include:
Leach salts early by flushing fields with freshwater before planting or early in crop development.
Maintain shallow water depth (3–5 cm) to reduce capillary rise and salt deposition near the root zone.
Avoid prolonged dry soil during sunny hours which increases evaporation and salt concentration.
Improve Soil Conditions and Drainage
Good soil and water movement reduce salt accumulation around the roots:
✔ Build raised beds with good drainage tails to allow excess salts to leach deeper into the soil.
✔ Ensure adequate inlet and outlet systems to control water flow and prevent salt water intrusion during tidal influence.
✔ Consider soil additives that help improve structure and reduce compaction.
Proper Fertilization and Nutrient Balance
Salt stress reduces nutrient uptake. To help rice plants cope:
Use balanced nitrogen, phosphorus, and potassium — avoid over-application of nitrogen.
Increase potassium which helps improve stress tolerance.
Apply calcium sources such as gypsum to help displace sodium ions and improve soil structure.
Maintain organic matter in the soil to enhance nutrient availability and overall soil health.
Use of Crop Support Solutions
To help rice plants better withstand salt stress, biological support products like Cropboost AP can be used:
✔ Stimulates stronger root growth and nutrient uptake
✔ Enhances plant vigor and stress tolerance
✔ Improves chlorophyll production and leaf health
Application timing:
Spray the solution during early stages of stress when leaves begin to show salt injury symptoms for best effects.
Monitoring and Timely Intervention
✔ Scout rice fields frequently, especially in areas prone to salt intrusion.
✔ Use a soil salinity meter (EC meter) if available to track changing salinity levels.
✔ Adjust management practices quickly when rising salt stress is detected.
Conclusion
Salinity injury can severely impact rice performance and yield if not properly managed. However, by combining correct water and soil management, balanced fertilization, support products, and timely interventions, the negative effects of salt stress can be minimized.
For more guidance and tailored technical advice, please contact Minh Long Agro’s advisory team or visit your nearest authorized dealer.
MINH LONG AGRO CO., LTD.
📍 Address: 137 Tran Xuan Soan Street, Tan Thuan Ward, Ho Chi Minh City
📞 Hotline: 1900 8982
🌐 Website: www.minhlongagro.com
