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Journal of Agronomy
  Year: 2010 | Volume: 9 | Issue: 3 | Page No.: 102-110
DOI: 10.3923/ja.2010.102.110
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Impact of Organic and Inorganic Fertilizers on Microbial Populations and Biomass Carbon in Paddy Field Soil

N. Nakhro and M.S. Dkhar

A field experiment was conducted to examine the microbial populations and microbial biomass carbon under organic and inorganic farming practices in paddy (variety IR-64) fields. The organic fertilizer used was a mixture of farmyard manure, rock phosphate and neem cake, while on the other hand for inorganic fertilizer, a mixture of urea, single super phosphate and muriate of potash was used. Microbial population counts were analysed from samples collected from the surface (0-15 cm) and sub-surface (15-30 cm) soil depths of the treated plots by soil plate and dilution plate methods for fungi and bacteria, respectively. Results obtained showed that the organically treated plot recorded the maximum microbial population counts (fungal and bacterial) and microbial biomass carbon, followed by the inorganically treated plot and control. A significant variation in fungal population was found between control and treated plots (organic and inorganic) at the surface soil depth, whereas at the sub-surface soil depth it was between all the plots (Tukey’s test at p≤0.05). Organic plot exhibited a significant variation in bacterial population (both the soil depths) with the inorganically treated plot and control (Tukey’s test at p≤0.05). Organic carbon showed significant positive correlation with fungal and bacterial populations (p≤0.05). The application of organic fertilizers increased the organic carbon content of the soil and thereby increasing the microbial counts and microbial biomass carbon. The use of inorganic fertilizers resulted in low organic carbon content, microbial counts and microbial biomass carbon of the soil, although it increased the soil’s NPK level which could be explained by the rates of fertilizers being applied.
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  •    Biodiversity Comparison between Paired Organic and Conventional Fields in Puducherry, India
  •    Effect of Panchagavya, Humic Acid and Micro herbal Fertilizer on the Yield and Post Harvest Soil of Soya Bean (Glycine max L.)
  •    Volatiles of Artemisia annua L. as Influenced by Soil Application of Organic Residues
  •    Enumeration of Arthropods Density in Context to Plant Diversity and Agricultural (Organic and Conventional) Management Systems
How to cite this article:

N. Nakhro and M.S. Dkhar, 2010. Impact of Organic and Inorganic Fertilizers on Microbial Populations and Biomass Carbon in Paddy Field Soil. Journal of Agronomy, 9: 102-110.

DOI: 10.3923/ja.2010.102.110


28 August, 2010
Sanjib ketan Sahoo:
My suggetion is further experiment may be done by other organic resources because due to availablity of organic manure please go for other resourse but i am well greate full to you .
31 August, 2010
Neilhousano Nakhro:

Thank you so much for your valuable suggestion. i am also interested in doing further experiments with other organic resources as well.





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