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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(3): 2170-2178
DOI: https://doi.org/10.20546/ijcmas.2018.703.256


Effect of Azotobacter vinelandii strain SRIAz3 and N-source on Microbiological Properties of Rice Grown Soil
Soumya Ranjan Dehury1, Rajeswari Das1*, Pinki Seth2, Madhusmita Pradhan1and Santanu Mohanty1
1Department of Soil Science and Agricultural Chemistry, College of Agriculture OUAT, Bhubaneswar, Odisha, India
2Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, Bangalore - 560065 (Karnataka), India
*Corresponding author
Abstract:

The present investigation was carried out to assess the efficiency as well as effect of bio inoculation of free living N2 fixing bacterial strain (Azotobacter vinelandii strain SRIAz3) with N sources on enhancement of microbial properties of soil. A. vinelandii strain SRIAz3 was isolated from SRI Field (Central Farm, OUAT, Bhubaneswar) with optimum nitrogenase activity [121.09 N2-ase activity (nmole C2H4 mg-1 bacteria-1 h-1)]. Azotobacter inoculated plots significantly influenced the microbial parameters. In Azotobacter innoculated plot with 75% nitrogen source total heterotrophic bacteria, Azotobacter population, soil microbial biomass carbon, dehydrogenase, urease and phosphatase activity were enhanced by 40, 160, 80, 240, 80, 210 and 250 percent respectively over uninoculated plots. Higher Azotobacter population resulted in increased soil enzymatic (dehydrogenase, urease and phosphatase) activities and microbial biomass carbon. Use of Azotobacter vinelandii strain SRIAz3 isolated from SRI Field as biofertilizer significantly influenced soil microbial biomass and enzymatic activity, which could consequently enhance the rice yield and nutrient (N, P and K) uptake.


Keywords: Azotobacter rice, Biomass, Urease, Dehydrogenase, Phosphatise activity
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How to cite this article:

Soumya Ranjan Dehury, Rajeswari Das, Pinki Seth, Madhusmita Pradhan and Santanu Mohanty. 2018. Effect of Azotobacter vinelandii strain SRIAz3 and N-source on Microbiological Properties of Rice Grown Soil.Int.J.Curr.Microbiol.App.Sci. 7(3): 2170-2178. doi: https://doi.org/10.20546/ijcmas.2018.703.256