Nitrogen fixing efficiency and physiological characteristics of Azospirillum isolates from the paddy fields of North Bengal
DOI:
https://doi.org/10.3329/jujbs.v3i1.28277Keywords:
Azospirillum, isolates, north Bengal, pH, temperature, salinity, biofertilizerAbstract
The microbial activity of ten selected Azospirillum isolates was measured in terms of the amount of CO2 evolved by the isolates after incubation for 5 days which ranged from 6.88 to19.25 mg. Nitrogen fixing efficiency all of the isolates was determined by microkjeldhal method and the nitrogen fixing efficiency ranged from 10.03 to 13.11 mg N/g substrate. The growth of Azospirillum isolates was significant affected by different physiological factors such as pH, temperature and salinity. Most of the isolates showed optimum growth at pH 6.8, temperature 37°C and in the absence of NaCl. Azospirillum has the potential to be used as a substitute and or supplement of N-fertilizers. Further research is needed to estimate N-supplement potentials of biological nitrogen fixation (BNF) systems at the farm level.
Jahangirnagar University J. Biol. Sci. 3(1): 47-53, 2014 (June)
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(c) Jahangirnagar University Journal of Biological Sciences.
Articles in the Jahangirnagar University Journal of Biological Sciences are Open Access articles published under the Creative Commons CC BY License (https://creativecommons.org/licenses/by/4.0/). This license permits use, distribution and reproduction in any medium, provided the original work is properly cited.