Dynamics of microbial communities in red sanders (Pterocarpus santalinus) rhizosphere soil Vennila S*, Silambarasan S, Krishnaveni A Agricultural College and Research Institute, TNAUVazhavachanur, Tiruvannamalai606753Tamil Nadu, India *Email for correspondence: vennila.s@tnau.ac.in
Online Published on 25 January, 2024. Abstract The rhizosphere soil microbial dynamics and fertility status of the red sanders at different locations viz Rangapuram, Athiyandal, Karumandurai, Balapuram and Attur were studied. In order to find out the impact of Red Sanders on soil microbes, the microbial dynamics and fertility status of non-rhizosphere soils were also assessed. In general, the dynamics of microflora varied widely among locations as well as between red sanders rhizosphere and non-rhizosphere soils. The results showed that Balapuram rhizosphere was most rich in bacterial but poor in fungal population; Rangapuram rhizosphere soils were most rich in actinomycetes but poor in bacterial population and Attur rhizosphere soils were most rich in fungal but poor in actinomycetes population, among the five locations. The mean rhizosphere soils and non-rhizosphere soils ratio of microflora was maximum (1.64) at Rangapuram. Highest pH of 6.57 each was recorded in rhizosphere soils at Karumandurai and Attur, EC in rhizosphere soils (1.10 dS/m) at Athiyandal and organic carbon in rhizosphere soils at Athiyandal and Balapuram (0.87% each). Maximum available N in rhizosphere soils (459.94 kg/ha) was at Karumandurai; available P in rhizosphere soils (16.42 kg/ha) at Attur and available K in rhizosphere soils (280.00 kg/ha) at Karumandurai. While comparing rhizosphere and non-rhizosphere soils, it was found that non-rhizosphere soils were microbially more diverse. The beneficial microbes viz Azotobacter, Azospirillum and phosphate solubilizing microorganisms were isolated from soil samples collected from different locations. Top Keywords Red sanders, Microbial communities, Rhizosphere, Non-rhizosphere. Top |