Evaluation of Plant Growth Promotion by Rhizobium-Inoculated Biofertilizer in Leguminous and Non-Leguminous Crops

Rhizobium species are widely recognized for their role in symbiotic nitrogen fixation in leguminous crops. However, their potential to enhance growth in non-leguminous crops remains underexplored. This study evaluates the plant growthpromoting efficiency of Rhizobium-inoculated biofertilizer on Vigna radiata (Green gram) and Zea mays (Maize) under controlled conditions. Biofertilizer formulations containing Rhizobium sp. were applied at sowing, and their effects on germination, shoot and root length, fresh and dry biomass, and chlorophyll content were assessed after 30 days. Results revealed a significant improvement (p < 0.05) in all growth parameters of Vigna radiata, while non-leguminous maize showed moderate growth enhancement. ANOVA indicated significant differences between treatments, with Rhizobium-inoculated biofertilizer outperforming control and chemical fertilizers. These findings highlight the scope of Rhizobium biofertilizers as sustainable growth promoters for leguminous crops and as potential growth enhancers for non-legumes.