Key Takeaways
- String Bio and CLRRI completed the first field trial of CleanRise® in Vietnam’s Mekong Delta.
- CleanRise improved grain yield by 12% and maintained yields even with 25% reduced nitrogen use.
- Trials reported 30–40% lower greenhouse gas emissions.
- CLRRI researchers highlighted compatibility with national low-carbon rice initiatives.
- Additional multi-location trials are recommended before national scale-up.
String Bio Completes First CleanRise® Field Trial with CLRRI in Vietnam
String Bio has completed its first field trials of CleanRise® in Vietnam in partnership with the Cuu Long Delta Rice Research Institute (CLRRI), marking a key milestone in the company’s expansion of low-carbon agricultural solutions across Asia. The trial was conducted in the Mekong Delta during the Summer–Autumn 2025 season and tested the performance of the foliar microbial biostimulant in real-world paddy systems.
CleanRise®, developed using String Bio’s patented platform, is designed to enhance nutrient-use efficiency and stimulate systemic plant responses that support productive tillering and reduce grain sterility. According to previous studies in India, the product has also demonstrated the potential to reduce methane and nitrous oxide emissions by up to 50%.
Field Trial Findings
CLRRI evaluated CleanRise under four treatment scenarios, including full and reduced nitrogen applications with and without the product. Key outcomes included:
