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Effect of acidic soil on bacterial diversity in selected wheat fields of Gopalganj district in North Bihar

Basant Narain Singha* & Amarendra Kumar Jhab
a*Principal, Dr. Shukla Singh (SS) School, Khairatia(Malikana) Gopalganj, Bihar, India
Received : 11th December, 2016 ; Revised : 22nd February, 2017

Abstract : The present study was related to documentation of Bacterial diversity in selected sites with difference in soil acidity as pH is critical factor for shaping the microbial patterns in wheat field soils. The site 1 represented acidic soil, while site 2 was neutral due to upland location. Enumeration of heterotrophic bacteria and fungi were performed through heterotrophic plate count (HPC) with three replicates using conventional plating techniques from soils decimally diluted by sterile distilled water. The bacterial phyla retrieved from site 1 were more diverse than those at site 2, and their bacterial compositions were quite different. Almost one third phyla at site 1 were protobacteria with 6 other phyla and in contrast soil at site 2 comprised of three main phyla as Actinobacteria, Bacteroidetes and Proteobacteria. Furthermore, only two species was common at both sites. The acidic soil of site 1 represented a non-optimal pH for bacterial growth and thus bacterial diversity, eveness and richness at this site were higher than those found in the site 2. These results and the indices of population parameters examined in this study indicated that acidity might not play a main role for bacterial diversity in soil.

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