期刊名称：Journal of Environmental Science and Natural Resources
印刷版ISSN：2408-8633
出版年度：2013
卷号：5
期号：2
页码：185-192
语种：English
出版社：Bangladesh Society for Conservation of Environment and Natural Resources
摘要：The experiment was conducted to carry out the nitrogen fixing cyanobaterial (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, twelve months long systematic observation was undertaken. A total of 15 genera with 42 species of non-filamentous (unicellular and colonial) blue-green algal forms were identified and recorded from this region. Out of 42 species, 9 species belonging to the genus Aphanocapsa , 8 to Chroococcus , 5 to Gloeocapsa , 4 to Aphanothece , 3 to Gloeothece , 3 to Merismopedia and 2 to Coelosphaerium ; while 1 species belonging to each genus of Chroococcidiopsis , Synechococcus , Synechocystis , Dactylococcopsis , Microcystis , Myxosarcina , Hydrococcus and Xenococcus . The distribution pattern of non-filamentous BGA in rice fields over the study area has also been observed in this study. With few exceptions, the non-filamentous 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.v5i2.14812 J. Environ. Sci. & Natural Resources, 5(2): 185-192 2012
