Abstract

• Blue Green Algae perform as a bioindicator for paddy field and play the important roles in agricultural soils. The algae specimens and soil samples were collected from paddy field of Bo taug kone village, Patheingyi Township during the months from June 2022 to January 2023. A total of twenty-four species belonging to eleven genera of division Cyanophyta were identified according to their morphological characteristics. The soil pH, electrical conductivity, nitrogen, phosphorus, potassium, moisture and soil texture were measured. Nitrogen fixation blue green algae such as Anabaena ambigua, A. orientalis, A. variabilis, Cylindrospermum muscicola, Nostoc ellipsosporum, N. microscopicum, N. commune, N. paludosum, N. spongiforme, Gloeotrichia raciborskii and others blue green algae species were found in the paddy field soil. The present study concludes that the blue green algae enhances soil fertility and is capable of nitrogen fixation for agriculture soil.