scholarly journals Rice Field Blue-green Algae of Bongaigaon District, Assam

Our Nature ◽  
1970 ◽  
Vol 8 (1) ◽  
pp. 357-359
Author(s):  
A.K. Das ◽  
G.C. Sarma
Keyword(s):  
Green Algae ◽  
Rice Field ◽  
Single Species ◽  
Rice Fields ◽  
Blue Green Algae

The present study deals with the blue-green algae (BGA) from the rice fields of Bongaigaon district, Assam. 23 species of blue-green algae belongs to 12 genera has been enumerated. Maximum species were found under the genus Nostoc (4), Anabaena (4), which is followed by Scytonema (3) Aphanocapsa (2), Aphanothece (2) and Phormedium (2). Single species was represented by the genera Microcystis, Chroococcus, Merismopedia, Oscillatoria, Aulosira and Calothrix.DOI: 10.3126/on.v8i1.4344

A Comparison of the Use of Azolla and Blue-green Algal Bio-fertilizers with Green Manuring, Organic Manuring and Urea in Transplanted and Direct-seeded Rice

1989 ◽  
Vol 25 (4) ◽  
pp. 485-491 ◽  
Author(s):  
A. L. Singh ◽  
P. K. Singh
Keyword(s):  
Green Algae ◽  
Nitrogen Uptake ◽  
Rice Field ◽  
Nitrogen Sources ◽  
Poor Response ◽  
Rice Crop ◽  
Green Manuring ◽  
Blue Green Algae ◽  
Green Algal ◽  
Direct Seeded

SUMMARYAzolla and blue-green algae (BGA) inoculated in a rice field produced a higher biomass and fixed more nitrogen in transplanted than in direct-seeded rice. Application of Azolla, BGA, composts of Eichhomia and Azolla and green manuring with Sesbania increased tiller numbers, height, grain and straw yields, and nitrogen uptake by rice in both the transplanted and the direct-seeded crop. The growing and incorporating of three Azolla crops with the rice crop produced more grain than the use of other nitrogen sources but the rice crops showed a poor response to inoculation with BGA. The yield of rice following green manuring with Sesbania or the use of two crops of Azolla after transplanting was similar to that of a crop receiving 60 kg N ha−1 as urea, but smaller yields resulted from the use of composts of Azolla and Eichhornia.

Blue-green algae from rice fields in Kerala State, India

Hydrobiologia ◽  
1987 ◽  
Vol 144 (3) ◽  
pp. 223-232 ◽  
Author(s):  
N. Anand ◽  
R. S. Shantha Kumar Hopper
Keyword(s):  
Green Algae ◽  
Rice Fields ◽  
Blue Green Algae ◽  
Kerala State

scholarly journals The role of blue-green algae in nitrogen fixation in rice-fields

1939 ◽  
Vol 127 (846) ◽  
pp. 121-139 ◽  
Keyword(s):  
Nitrogen Fixation ◽  
Soil Temperature ◽  
Green Algae ◽  
Rice Fields ◽  
Harvest Time ◽  
Dry Period ◽  
Blue Green Algae

The problem, with which this paper deals, arose out of the observation that in India rice can be grown on the same land for long periods without the addition of manure to the soil (Howard 1924, p. 114). Three distinct periods are distinguishable in Indian rice fields, viz.: (1) Waterlogged period (from transplantation up to harvest time), in which there are a few inches to several feet of water above the soil and which is distinguished by the growth of abundant algae. (2) The dry period, which follows in winter after harvest and during which conditions remain very suitable for microbiology activity. (3) The desiccation period, commencing after winter when the soil temperature frequently exceeds 50° C.

Fertility build-up of rice field soils by blue-green algae

1965 ◽  
Vol 62 (6) ◽  
pp. 252-272
Author(s):  
R. Subrahmanyan ◽  
L. L. Relwani ◽  
G. B. Manna
Keyword(s):  
Green Algae ◽  
Rice Field ◽  
Blue Green Algae ◽  
Field Soils

scholarly journals Distribution of blue-green algae in soils of Chittagong University campus and their nitrogen fixing capacity

1970 ◽  
Vol 37 (1) ◽  
pp. 49-53
Author(s):  
MA Gafur ◽  
Soltana Parvin
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Rice Field ◽  
Maximum Amount ◽  
University Campus ◽  
Nitrogen Fixing ◽  
Batch Cultures ◽  
Blue Green Algae ◽  
Field Soils ◽  
Potential Maximum

Occurrence of blue-green algae in plain land, pond side, hilly area and dry rice field soils of Chittagong University Campus and N2 fixation of some of them have been studied. Twenty four species under 20 genera were identified and their number varied from 0.11×104/g to 2.8×104/g soil. Anabaena oryzae, Calothrix sp., Cylindrospermum majus and Hapalosiphon hibernicus and Nostoc spongiaeforme were selected for their nitrogen fixing potential. Maximum amount of total nitrogen was recorded in Nostoc spongiaeforme followed by Hapalosiphon hibernicus, Cylindrospermum majus, Anabaena oryzae and Calothrix sp. after 30 days growth in batch cultures.   Key words: BGA, Distribution, Nitrogen fixation doi:10.3329/bjb.v37i1.1563 Bangladesh J. Bot. 37(1): 49-53, 2008 (June)

scholarly journals Characterization of blue green algae isolated from Egyptian rice field with potential anti-hepatitis C active components

2014 ◽  
Vol 13 (9) ◽  
pp. 1086-1096 ◽  
Author(s):  
A. Amer Ranya ◽  
Abdel Wahab Abeer ◽  
M.F. Fathy Sahar ◽  
M. Salama Osama ◽  
A El Demellawy Maha
Keyword(s):  
Hepatitis C ◽  
Green Algae ◽  
Rice Field ◽  
Active Components ◽  
Blue Green Algae
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