Investigation on the Nitrogen Fixing Cyanobacteria (BGA) in Rice Fields of North-West Region of Bangladesh. III: Filamentous (Heterocystous)

Authors

  • MA Hasan Department of Agronomy and Agricultural Extension, Rajshahi University

DOI:

https://doi.org/10.3329/jesnr.v6i1.22075

Keywords:

Bangladesh, Filamentous-heterocystous, Nitrogen fixing cyanobacteria (BGA), North-West Region, Rice fields.

Abstract

The experiment was conducted to carry out the nitrogen fixing cyanobacterial (BGA) resources and their distribution pattern in rice fields of North-West region of Bangladesh during the period of 2011. Considering the vast importance of Blue-green algae (BGA) in agricultural land especially in rice fields, their twelve months long systematic was undertaken. A total of 10 genera with 37 species of filamentous-heterocystous blue-green algal forms were identified and recorded from this region. Out of 37 species, 9 species belonging to the genus Anabaena, 8 to Nostoc, 5 to Cylindrospermum, 4 to Calothrix, 3 to Rivularia, 3 to Gloeotrichia and 2 to Aulosira; while 1 species belonging to each genus of Anabaenopsis, Microcheate and Aphanizomenon. The distribution pattern of filamentous-heterocystous BGA in rice fields over the study area has also been observed in this study. With few exceptions, the filamentous-heterocystous BGA are more or less uniformly distributed all over the study areas. All of the BGA members have a tremendous ability to contribute on enhancing agricultural production by fixing atmospheric nitrogen and adding organic matter, vitamins, growth promoting substances etc to the soil and crops.

DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22075

J. Environ. Sci. & Natusral Resources, 6(1): 253-259 2013

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Published

2015-02-10

How to Cite

Hasan, M. (2015). Investigation on the Nitrogen Fixing Cyanobacteria (BGA) in Rice Fields of North-West Region of Bangladesh. III: Filamentous (Heterocystous). Journal of Environmental Science and Natural Resources, 6(1), 253–259. https://doi.org/10.3329/jesnr.v6i1.22075

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