Indian Journal of Agricultural Research

  • Chief EditorT. Mohapatra

  • Print ISSN 0367-8245

  • Online ISSN 0976-058X

  • NAAS Rating 5.20

  • SJR 0.293

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Indian Journal of Agricultural Research, volume 56 issue 4 (august 2022) : 401-407

Distribution of Soil Microorganisms in Field under Potatoes due to Fertilizer and Organics

Stefan Shilev, I. Mitova, V. Kuncheva, N. Dinev, Lyudmila Kabaivanova
1The “Stephan Angeloff” Institute of Microbiology, Bulgarian Academy of Sciences, “Acad. G. Bonchev” str. 26, Sofia, Bulgaria.
Cite article:- Shilev Stefan, Mitova I., Kuncheva V., Dinev N., Kabaivanova Lyudmila (2022). Distribution of Soil Microorganisms in Field under Potatoes due to Fertilizer and Organics. Indian Journal of Agricultural Research. 56(4): 401-407. doi: 10.18805/IJARe.A-669.
Background: Using organic manure derived from animal or vegetable matter is often associated with balanced crop production. The influence of organics and fertilizers on soil sustainability during cultivation of potatoes in field was studied. 
Methods: Vegetable experiment comprising 10 years (2011-2021), having a control variant (no fertilization), independent mineral, organics (compost) and their combination (50:50%). Changes in the amount and distribution of microbial groups in experimental variants and associated untreated controls were evaluated. Total bacterial number, spore-forming bacteria, fungi, nitrogen-utilizing bacteria and actinomycetes were assessed.
Result: Applied organics and fertilizers had statistically proven a positive effect on growth parameters of potatoes. Organics and fertilizers supplied with mineral and foliar feeding registered taller plants with increased number of branches, number and mass of leaves and stem and root masses, compared to potatoes with organic and organic-mineral combination. Application of compost led to a significant increase in populations of all physiological groups of microorganisms excluding spore-forming bacteria and bacteria utilizing mineral nitrogen, which is a good indicator of increased soil microbial activity in respective treatments. Mineral fertilization had a positive effect on total number of bacteria and on absorption of mineral nitrogen. The treatment in variant (50:50 %) at rhizosphere soil was associated with organic manure application and at non-rhizosphere soil with mineral fertilizer.

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