Bio Assay of Different Native Isolates of Azospirillum

An experiment was conducted at ARS, Amaravathi to isolate the native strains of Azospirillum from the rhizosphere of chillies and to study their efficiency on growth, nutrient content, uptake, nitrogen forms and microbial population in soil. Chilli seedlings were grown for 45 days in the pots and were then removed carefully along with ischolar_mains. Dry weights of plant samples were recorded and were analyzed for nitrogen, phosphorus and potassium concentrations and N, P and K uptake in the seedlings were computed. Rhizosphere samples were analyzed for nitrogen forms and microbial population. Inoculation with different native isolates of Azospirillum significantly increased nutrient uptake by the chilli seedlings and also nitrogen content in soil. Among the different native isolates tested, SCH₁₈ was superior to all other native isolates and was at par with the standard strain ICM 1001.