SUMMARYNostocs are motile, filamentous mucilaginous gelatinous colonial form of algal taxa belonging to order Nostocales and family of Nostecase. This is a common alga of both terrestrial and aquatic habitats. Terrestrial species grow on bare soil or intermingled with leafy plants many species are known to grow in the paddy fields and in alkaline user soil. Lazaroff (1973) summarized his own and other investigation of the life history of Nostoc are related to nutrition and light. Enormous information is available on occurrence and distribution of nostocales from various part of India. Nostoc species has been used most frequently in fundamental research to improve soil qualities and crop production. These algal specimens which are more frequently found in the soil of rice field were collected during 2008-2009 were dominant in the soil of rice fields. Nostoc commune, N. linekia were recorded throughout the year. A. azollae is found symbiotically with Azolla plant during summer season. As there is no report of any kind of algal investigation in rice field at Ranchi district. Survey was made for the collection and identification of order Nostocales algal specimen during the period of Nov. 2008 to 2010. Present paper deals with the total 8 species of Nostoc belonging to order Nostocales.

The blue green algal flora found in the paddy field of Jharkhand is comparatively poorly known. Only few workers described the blue green algae principality growing in water habitats. In this investigation total 68 taxa of blue green algae belonging to 20 genera viz.

Cyanobacteria are the largest and morphologically diverse group of prokaryotes which occur in almost all habitats on the Earth. They are the only nitrogen fixing organisms that have on oxygen evolving Photosynthetic system. Cyanobacteria are also use as a biofertilizer to improve soil quality, productivity and yield components of paddy. Producing mass culture of BGA for industrial purposes represents novel Biotechnology. Blue green algal biomass has been considered since long as an alternative source of protein that could supplement conventional food and feed production. Producing mass culture of BGA for industrial purposes represents novel Biotechnology. It is well known that it is extremely difficult if not impossible to get pure growth of desired alga in nature. During this investigation four local filamentous strains were selected for cultural studies these stains are Aulosira fertilissma, Sytonema simplex, Cylindrospermum musicola and Nostoc commune. As all the members of blue green algae studies in above mentioned experiments belong to heterocystous group. Experiment was set up in order to study the growth of the above BGA separately as well as association. The mixed culture was prepared taking two member of BGA in different possible combination. Biomass cultured specimens has been expressed in dry weight in mg/l. Result indicate that the growth of all organisms follows an increasing trends with increase in time of incubation under in vitro culture. The maximum biomass founded in Aulosira fertilissma 48.7 mg/l and minimum 16 mg/l, Nostoc commune 20 mg/l, Sytonema simplex 18.5mg/l, respectively after 3o days growth. Present result on mix culture shown the maximum biomass weight founded in the combination of Aulossira fertilissma and Nostoc commune 64 mg /l after 30 days and minimum weight of biomass have been recorded in the combination of Scytonema simplex and Nostoc commune.HOW TO CITE THIS ARTICLE : Mahto, Ashmrita and Sahu, Radha (2018). Mass production of blue green algae under artificially controlld condition. Asian J. Environ. Sci., 13(1&2): 23-25,

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