P- ISSN: 0976-1675
E- ISSN: 2249-4538

© CARAS (Centre for Advanced Research in Agricultural Sciences)
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Population Dynamics of Bacteria and Physiochemical Properties of Soil in Different Agricultural Fields of Tiruvarur District, Rice Bowl of Tamil Nadu

Rice plants are in close contact with the soil through their roots. Microbes inhabited on the root surface (rhizoplane), inside the root (endosphere), and in the soil surrounding the root surface (rhizosphere) play a crucial role in plant immunity and yield. But there is very little information regarding the microbial consortia in the rhizosphere during different seasons of rice cultivation. Therefore, the objective of our study was to assess, contrast and correlate the bacterial population observed during different seasons among various places in Tiruvarur district along with their physiochemical parameters. This study revealed 21 bacterial species that belong to three major phyla, four classes, eight orders, ten families, and fifteen genera. In the Tiruvarur rice fields, bacterial genera such as Aeromonas, Azotobacter, Azospirillum, Bacillus, Bradyrhizobium, Enterobacter, Escherichia, Flavobacterium, Pseudomonas, Rhizobium, Salmonella, Serratia, Shigella, Vibrio, and Yersinia were found. The soil physiochemical characteristics like pH, electrical conductivity, organic carbon, available nitrogen, phosphorus, potassium, zinc, copper, iron, and manganese were studied during the pre-monsoon, monsoon, post-monsoon, and summer seasons in five places in the Tiruvarur rice field. Additionally, the Pearson correlation coefficient analysis was also done on the obtained databases and the level of significance was seen at P<0.05. The results of the study demonstrate that a special consortium of bacteria inhabited the rice soil during different seasons which may help to improve crop yield.

Research Article | Published online : 02-Dec-2023