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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(5): 1483-1491
DOI: https://doi.org/10.20546/ijcmas.2017.605.161


Soil Enzyme Activities, Microbial Diversity and Available Nutrients Status of an Alfisol under Long Term Fertilization
R.C. Gowda, P. Veeranagappa*, D.C. Hanumanthappa and Muneshwar Singh
All India Coordinated Research Project on Long Term Fertilizer Experiments University of Agricultural Sciences, Bengaluru, Karnataka, India
*Corresponding author
Abstract:

The changes in enzyme activities, microbial diversity and nutrients availability in soil under long term fertilization (30 years) with inorganic fertilizers alone or in combination with organics/amendments were investigated in the present study. The experiment consisted of eleven treatments with four replications with the finger millet-maize cropping sequence. Significantly higher biomass C (276.53µg/g) and biomass N (27.20 µg/g) contents were recorded with 100 % NPK+FYM+lime and 100 % NPK+FYM application respectively. Soil enzyme activities (Acid Phosphotase and Dehydrogenase) were higher in these treatments. The general soil microflora was also higher on application of NPK, FYM and lime. The results also envisaged that application of inorganics alone resulted in decreased nutrients status (available NPK) over balanced fertilizer application. Soil acidification was accelerated with application of nitrogenous fertilizers alone (-1.87 unit reduction in soil pH over initial) and the soil pH was maintained in balanced fertilization (6.46). Available nutrients in soil were higher in 100 % NPK+FYM+lime and 100 % NPK+FYM application where the combined application of fertilizers, manure and amendments were undertaken.


Keywords: Enzyme activity, Microbial diversity, Nutrients and fertilizers
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How to cite this article:

Gowda, R.C., P. Veeranagappa, D.C. Hanumanthappa and Muneshwar Singh. 2017. Soil Enzyme Activities, Microbial Diversity and Available Nutrients Status of an Alfisol under Long Term FertilizationInt.J.Curr.Microbiol.App.Sci. 6(5): 1483-1491. doi: https://doi.org/10.20546/ijcmas.2017.605.161