Abstract

• The present study deals with three Azospirillum strains (Azo-1, 2 and 3) were isolated from the root of Saccharum spontaneum L. (Kaing), Saccharum officinarum L. (Kyan), Dichanthium caricosum (L.) A. Camus. (Padaw ni) of Poaceae family during 2019. The growth responses of rice inoculation with indigenous isolated strains were studied. These experiments were carried out with 3 isolated strains from the roots of some grasses to know the germination percentage, shoot and root length. The inoculation of isolated strains increased in germination up to 4.12%, 16.25% in shoot length and 12.97% in root length over the control by isolated strain Azo-3. In pot culture, the inoculation of isolated strains increased in plant height (21.87%), leaf area (18.78%), tillering number (27.75%), panicle length (8.88%) and fertile seed per panicle (10.94%), and 1000 grain weight (5.28%) over the control by Azo-3. These results indicated that certain diazotrophs can promote vegetative growth and yield characters of rice.