DISTRIBUTION OF CYANOBACTERIA (BLUE-GREEN ALGAE) IN RICE FIELDS OF VARANASI
- Department of Botany, Udai Pratap Autonomous College, Varanasi-221002.
- Department of Soil Science and Agricultural Chemistry, Udai Pratap Autonomous College, Varanasi-221002.
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Cyanobacteria are the most important nitrogen fixing organism because of their autotrophic nutrition and flourish in rice fields and known to sustain the fertility of this ecosystem. The paddy field ecosystem provides a favorable environment for the growth of cyanobacteria with respect to their requirement for light, water, temperature and nutrient availability. Cyanobacteria play an important role in maintenance and build-up of soil fertility, consequently increase rice growth and yield as a natural biofertilizer. In respect to their role in increasing the fertility of rice soils cyanobacteria are of the special academic and applied interest. We survey and studied four different paddy fields of Varanasi namely Lakshmanpur, Ramnagar, Tarana and Sarnath for studying the cyanobacteria biodiversity. These paddy fields mainly comprises heterocystous and non-heterocystous blue-green algae. In the begning of rice crop Microcoleus sociatus, Lyngbya major, Phormidium truncicola and Oscillatoria subbrevis has been seen. In the middle of rice crop Oscillatoria subbrevis, Nostoc muscorum, Anabaena oryzae, A. doliolum, Cylindrospermum sphericum has been seen. At the maturity of rice crop luxurious growth of Nostoc muscorum, Anabaena doliolum, Cylindrospermum stagnale and Haplosiphon welwitschii have been found.
[Richa Singh, R.P. Singh and D.V. Singh (2015); DISTRIBUTION OF CYANOBACTERIA (BLUE-GREEN ALGAE) IN RICE FIELDS OF VARANASI Int. J. of Adv. Res. 3 (Aug). 1055-1060] (ISSN 2320-5407). www.journalijar.com
