Introduction
In the age of climate change, farmers are constantly seeking sustainable ways to improve crop productivity without burdening the environment. A recent study has shed light on a groundbreaking solution: cyanobacterium-based bacterial and fungal biofilms for Bt-cotton cultivation in rainfed Vertisol soils.
The Science Behind Biofilms
Cyanobacteria, often called blue-green algae, are ancient microorganisms known for nitrogen fixation and enhancing soil health. When combined with beneficial bacteria and fungi into dual- or multi-species biofilms, they create a synergistic ecosystem that boosts root growth, improves nutrient uptake, and strengthens plant defense mechanisms.
Key Findings of the Study
- Yield Boost: Dual-species biofilms increased Bt-cotton yields by 57–71% compared to untreated controls.
- Soil Health: Biofilm application improved organic carbon, nitrogen, phosphorus, and micronutrient availability, ensuring long-term fertility.
- Economic Benefits: Farmers using seed + soil drench (SSD) methods gained up to US$ 576 per hectare more than conventional practices.
- Fiber Quality: Staple length and fiber strength showed significant improvement, meeting industrial standards.
Why It Matters
Rainfed cotton farming often faces challenges like moisture stress, nutrient deficiencies, and low yields. Chemical fertilizers help but come at a cost—both financially and environmentally. This biofilm technology not only reduces chemical fertilizer dependency but also promotes sustainable agriculture.
The Climate-Smart Edge
With climate change threatening crop resilience, these microbial biofilms provide a nature-based solution by improving soil biology, enhancing drought tolerance, and reducing greenhouse gas emissions associated with synthetic fertilizers.
Conclusion
The use of cyanobacterium-based biofilms in Bt-cotton farming represents a win-win: higher yields, better soil health, and greater profitability, all while safeguarding the environment. It’s a promising leap toward sustainable and climate-smart agriculture.
Reference
Velmourougane, K., Prasanna, R., Angamuthu, M., Harinkhede, L. R., Bansod, P. T., Vaidya, J. B., & Prasad, Y. G. (2025). Cyanobacterium-based bacterial and fungal biofilms as economically viable and climate smart biostimulants for Bt-cotton in rainfed Vertisol. Journal of Applied Phycology. https://doi.org/10.1007/s10811-025-03671-1
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