• Srabanika Bardhan

The present communication deals with the blue green algal flora of West District of Tripura. The survey comprises 20 blue green algae belonging to Cyanophyceae. Describe the use of blue green algae as an alternative source to the synthetic nitrogen fertilizers. In cropping system, nitrogen is the most common limiting nutrient needed to increase agricultural production. This nitrogen can be obtained at high cost from commercial fertilizer or at very cost through biological nitrogen fixation by blue green algae as bio fertilizer can minimize the ecological disturbance. They are cost effective, ecofriendly and when they are required in bulk can be generated at the farm itself. The other plus point is that after using 3-4 years continuously there is no need of application of bio fertilizers because parental inoculums are sufficient for growth and multiplication. The addition of nitrogen fixing blue green algae, as a bio fertilizer, to paddy fields, is a prerequisite for the improve yield and continued high standard of rice cultivation at Tripura. Bio fertilizers can protect the natural atmosphere without any pollution. These are harmless and ecofriendly low cost input supplementary to chemical fertilizers which can also save the ecological and economical condition of tribal communities.

Blue Green Algae, Biofertilizer, Heterocyst, NPK, Pollution, Ecofriendly

"BLUE GREEN ALGAE USE AS A BIOFERTILIZER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 5, page no.d897-d900, May-2021, Available :http://www.jetir.org/papers/JETIR2105514.pdf

"BLUE GREEN ALGAE USE AS A BIOFERTILIZER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 5, page no. ppd897-d900, May-2021, Available at : http://www.jetir.org/papers/JETIR2105514.pdf